mlso.events.1999 ---------------- The following is a list of activity as seen by the observers at the Mauna Loa Solar Observatory (MLSO) in Hawaii. Additional information may be added by the personnel at the High Altitude Observatory (HAO) where the data is processed and analyzed. The initials of the HAO personnel are indicated in parenthesis. Dates are given by calendar day and by year/day-of-year. Key of abbreviations: ADF - Active dark filament AFS - Arch filament system AP - Active Prominence APR - Active Prominence Region AR - Active Region ASR - Active Surge Region BOU - Boulder, Colorado Observatory BSD - Bright surge on the disk BSL - Bright surge on the limb CME - Coronal Mass Ejection CRN - Coronal rain DPMON - Digital prominence monitor DSD - Dark surge on the disk DSF - Disappearing filament EPL - Eruptive prominence on the limb MDP - Mound prominence MLSO - Mauna Loa Solar Observatory QP - Quiescent prominence PA - Position angle (measured counterclockwise from north pole. eg. east equator = 90 degrees, west equator = 270 degrees) RV - Radius vector UT - Universal Time WL - White light NOTE: (bracketed letters indicate observer's initials) ***************************************************************************** 1/01/1999 99d001 No data taken at MLSO today. 1/02/1999 99d002 Mk3 data: 17:37 -> 23:23 No apparent coronal activity. (td) 1/03/1999 99d003 Mk3 data: 17:37 -> 22:06 No apparent coronal activity. (td) 1/04/1999 99d004 Mk3 data: 21:08 -> 21:44 Only a few images were taken today due to clouds. No apparent coronal activity is visible from them. (td) 1/05/1999 1999d005 Mk3 data: 17:28 -> 22:54 Very small spike appears at PA 310 at 19:22UT. Difficult to determine what it is. It remains throughout the rest of the day. (td) 1/06/1999 1999d006 Mk3 data: 17:35 -> 19:22 Lots of clouds today. No visible coronal activity. (td) 1/07/1999 1999d007 Mk3 data: 19:52 -> 21:14 Short day due to clouds. No apparent coronal activity. (td) 1/08/1999 1999d008 No MK3 data. 1/09/1999 1999d009 No MK3 data. 1/10/1999 1999d010 No MK3 data. 1/11/1999 1999d011 Mk3 data: 17:39 -> 22:08 No apparent coronal activity. (td) 1/12/1999 1999d012 Mk3 data: 18:05 -> 22:07 No apparent coronal activity. (td) 1/13/1999 1999d013 Mk3 data: 17:47 -> 23:01 No apparent coronal activity. (td) 1/14/1999 1999d014 Mk3 data: 17:47 -> 23:07 No apparent coronal activity. (td) 1/15/1999 1999d015 Mk3 data: 17:35 -> 18:30 Short data coverage due to clouds. No apparent coronal activity. (td) 1/16/1999 1999d016 Mk3 data: 17:58 -> 22:23 No apparent coronal activity. (td) 1/17/1999 1999d017 Mk3 data: 17:58 -> 23:38 CME visible starting at 22:33UT and remains visible in MK3 until approximately 23:28. Data is somewhat noisy during this time period. CME is centered at PA 122. Width is approximately 22 degrees. There is an outer loop and cavity feature along with brighter prominence material following in a south-eastern trajectory. (td) CHIP shows a huge eruptive prominence in the SE starting at ~22:20. There is also a lot of activity on the disk in the NE, and a cool active region in SE on the disk. (hg) 1/18/1999 1999d018 No data taken at MLSO today. 1/19/1999 1999d019 Mk3 data: 17:28 -> 22:09 No apparent coronal activity. (td) 1/20/1999 1999d020 Mk3 data: 17:40 -> 23:19 CME visible from 18:42-19:43. Very wide CME, width approximately 45 degrees centered at PA 64. There is a LOOP/CAVITY/CORE structure visible. The magnetic fields associated with the LOOP strucutre appear to push the outer areas of the helmet streamer apart, making this a very large event. Because the event is in the MK3 field of view for roughly one hour suggests a relatively fast moving ejection. CHIP shows material structured along radial field lines around PA 70 starting at ~20:10 (after the CME in this location). The material may be draining down to the limb. No indication that the CME was a front side event. (hg) 1/21/1999 1999d021 Mk3 data: 18:32 -> 23:13 No apparent coronal activity. (td) 1/22/1999 1999d022 No MK3 data. 1/23/1999 1999d023 No MK3 data. 1/24/1999 1999d024 Mk3 data: 17:49 -> 22:39 No apparent coronal activity. (td) 1/25/1999 1999d025 Mk3 data: 17:45 -> 22:07 No apparent coronal activity. (td) 1/26/1999 1999d026 No MK3 data. 1/27/1999 1999d027 Mk3 data: 17:59 -> 21:46 No apparent coronal activity. (td) CHIP shows cool activity along a filament in an active region in the north- material appears to be flowing north along the filament. (hg) 1/28/1999 1999d028 No MK3 data. 1/29/1999 1999d029 No MK3 data. 1/30/1999 1999d030 Mk3 data: 21:32 -> 22:53 No apparent coronal activity. (td) 1/31/1999 1999d031 No MK3 data. 2/01/1999 1999d032 Mk3 data: 17:46 -> 18:21 Short observing day due to bad weather. No apparent coronal activity. (td) 2/03/1999 1999d034 No data taken at MLSO today. 2/04/1999 1999d035 Mk3 data: 17:50 -> 23:04 No apparent coronal activity. (td) 2/05/1999 1999d036 Mk3 data: 17:26 -> 23:20 CME visible on SW limb. Very well defined cavity and core (prominence) features. There is an outer loop visible, but it is not as well defined as the other two features. The prominence appears relatively slow and first becomes visible in the MK3 FOV at 19:34 UT. It leaves the FOV by 22:29. The event is centered at PA 230 with a width of about 46 degrees. As the prominence lifts off of the limb, the loop and surrounding corona appear to widen. (td) 2/06/1999 1999d037 Mk3 data: 17:57 -> 23:11 Very thin, tenuous eruptive prominence centered at PA 233. It first appears in MK3 FOV at 18:26 UT and leave around 19:48 UT. Most of the mass appears to string out over most of the MK3 FOV. No indications of any associated loop or cavity features. (td) 2/07/1999 1999d038 Mk3 data: 17:32 -> 23:18 Extremely faint CME centered at PA 257. Visible (barely) from 18:50 - 20:17 UT. CME has an estimated width of 15 degrees. Appears as a thin, loop-like structure slowly moving southward from limb. (td) Nothing visible in CHIP at PA 257 besides a quiescent prominence. There is some interesting activity toward the north pole- a sort of swirling around of material. (hg) There is a filament-like structure in NW quadrant of CHIP data that may be associated with the AR mentioned above. It begins around 20:10 and remains visible throughout the rest of the observing day. Not sure if it is associated with the MK3 CME or not. (td) 2/08/1999 1999d039 No data taken at MLSO today. 2/09/1999 1999d040 Mk3 data: 17:23 -> 21:51 No apparent coronal activity. (td) 2/10/1999 1999d041 Mk3 data: 17:42 -> 23:03 No apparent coronal activity. (td) 2/11/1999 1999d042 Mk3 data: 17:50 -> 21:02 No apparent coronal activity. (td) 2/12/1999 1999d043 Mk3 data: 17:21 -> 21:25 No apparent coronal activity. (td) 2/13/1999 1999d044 Mk3 data: 17:49 -> 23:36 CME centered at PA 70. Very faint loop and cavity can be seen. Width is approximately 74 degrees. Visible from ~18:05 until 18:51 UT. CHIP data shows a nice two-ribbon flare in NE quadrant from around 19:01 until the end of the day, possibly associated with the MK3 CME. (td) 2/14/1999 1999d045 Mk3 data: 20:01 -> 23:32 No apparent coronal activity. (td) CHIP shows a possible small EPL at PA 80 from ~22:39-23:12. (hg) 2/15/1999 1999d046 No data taken at MLSO today. 2/16/1999 1999d047 Mk3 data: 17:23 -> 22:05 Very faint CME centered at PA 275, width is approximately 22 degrees. Visible in MK3 at the beginning of the day (seems to be in progress at the start of the observing day). First image in which it is visible is 17:42 and there appears to be a LOOP/CAVITY structure to it. The cavity feature can be seen widening the surrounding corona until about 18:37 UT. CHIP data shows a prominence near the same P-angle later in the day but it is difficult to tell if it is erupting or not, the time cadence of the movie loop is too long, not enough images. (td) CHIP also surge of material originating N of large AR in NW quadrant. Seems to travel SW-ward. Difficult to tell if it is eruptive or not. There is also a bright feature which appears just to the SW of the same AR at the end of the day. It appears to go out, then retreat. (td) 2/17/1999 1999d048 Mk3 data: 17:50 -> 23:10 No apparent coronal activity. (td) CHIP data shows material swirling over the large AR in the NW quadrant. There also appears to be an eruptive looking event (flare?) which occurs in the AR on the N central meridian. It begins ~20:34 UT. The material from this does not appear to retreat. (td) 2/18/1999 1999d049 Mk3 data: 17:49 -> 21:39 No apparent coronal activity. (td) CHIP data for today is poor but activity can be noted. The AR on the N central meridian has dark material swirling over it throughout the day. A surge of material can be seen just to the north of the AR, it appears ~18:45 UT. (td) 2/19/1999 1999d050 Mk3 data: 17:17 -> 20:53 No apparent coronal activity. (td) CHIP shows a thin wisp of material which appears to lift off of solar surface in the SE quadrant near the south-central meridian at about 18:46. Material appears to travel SE-ward. (td) 2/20/1999 1999d051 No MK3 data. 2/21/1999 1999d052 No MK3 data. 2/22/1999 1999d053 Mk3 data: 18:36 -> 18:39 Only two images for the day. Poor weather. (td) 2/23/1999 1999d054 Mk3 data: 17:18 -> 22:05 No apparent coronal activity. (td) CHIP: There is a large AP at PA 320-330 degrees. It is active throughout the day but does not appear to erupt. (td) 2/24/1999 1999d055 Mk3 data: 17:58 -> 23:31 No apparent coronal activity. (td) CHIP: Large AP at PA 320 still visible. Large AR in NW quadrant contains a filament-like feature which appears to be stretched over it. No eruptive events noted. (td) 2/25/1999 1999d056 Mk3 data: 17:59 -> 22:02 No apparent coronal activity. (td) CHIP: No apparent eruptive activity. (td) 2/26/1999 1999d057 Mk3 data: 17:18 -> 22:06 No apparent coronal activity. (td) CHIP: No apparent eruptive activity. (td) 2/27/1999 1999d058 Mk3 data: 17:36 -> 23:10 No apparent coronal activity. (td) CHIP sees a nice, large EPL in the NW starting at ~22:35. (hg) 2/28/1999 1999d059 Mk3 data: 17:54 -> 22:49 No apparent coronal activity. (td) CHIP: Large AP at PA 85 and a much larger one at PA 320-350. The larger AP appears to be the top part of a larger one over the limb. No apparent eruptive activity. (td) 3/01/1999 1999d060 Mk3 data: 17:12 -> 17:48 CHIP: Large AP at PA 320-340. No apparent eruptive activity. (td) 3/02/1999 1999d061 Mk3 data: 17:39 -> 22:03 Data is of poor quality due to weather. No coronal activity visible. (td) CHIP: Large band of AP's along west limb, from PA 270 to 340. AR on N. meridian appears to have a surge of activity but it is difficult to tell if anything is erupting. (td) 3/03/1999 1999d062 Mk3 data: 17:55 -> 23:13 Slow moving CME centered at PA 245. Visible in MK3 beginning at 18:50 UT and continues throughout the day (22:19). There is a LOOP/CAVITY/CORE structure apparent with the outer loop feature measuring approximately 28 degrees. (td) CHIP: EPL @ PA 245-255 from 18:19-20:41 UT. Large AR in NW quadrant shows a surge of activity ~20:23 UT. Two other large AP's on at PA 270 and another at PA 320-335. (td) PICS: EPL @ PA 250. Appears to lift off of limb and travel over the limb to the opposite side of the sun. In PICS disk data, there is a brightening in the AR in the NW quadrant from 20:23- 21:14 UT. The brightening appears to travel along the contour of the AR. This seems to match the activity mentioned in CHIP above. (td) 3/04/1999 1999d063 Mk3 data: 17:38 -> 21:48 No apparent coronal activty. (td) CHIP: Large AP @ PA 330. No apparent eruptive activity. (td) PICS: Large AP @ PA 320. No apparent eruptive activity. (td) 3/05/1999 1999d064 Mk3 data: 17:22 -> 21:53 Clouds at the observatory prevented obtaining much data for the day. No apparent coronal activity visible in images taken. (td) PICS: Possible flare in SE quadrant from 19:10-20:46. Occurs in small AR. (td) CHIP: AR in SE shows high activity from 19:15 UT - 20:10 UT possibly related to the h-alpha flaring event. An apparent wave can be seen propogating NE-ward at about the same time (almost simultaneousy). It is difficult to determine for certain whether the wave originates at the AR or not. (td) 3/06/1999 1999d065 Mk3 data: 17:40 -> 22:39 No apparent coronal activity. (td) CHIP: AR on S. central meridian seems to surge(?) briefly but does not erupt. No apparent eruptive activity. (td) PICS: There is a brightening on the S. Central meridian which coincides with the surge mentioned above. There does not appear to be any AR associated with this brightening in h-alpha. No apparent eruptive activity. (td) 3/07/1999 1999d066 Mk3 data: 17:48 -> 23:15 No apparent coronal activity. (td) CHIP: No apparent eruptive activity. (td) PICS: There is a possible flare event in an AR on the extreme eastern limb of the disk which appears 20:36-21:21 UT. It looks like a flaring event where material lifts and then falls southward. Because of the angle, it is difficult to say for sure that this event is associated with an active region. (td) 3/08/1999 1999d067 Mk3 data: 17:10 -> 22:08 Exceedingly faint CME centered at PA 257 degrees. Width is approximately 8 degrees. Visible as a thin sliver of material from 17:45-18:07 UT. Seems to be travelling radially outward. No LOOP or CAVITY features could be discerned. (td) CHIP: Very faint EPL visible at PA 280 from 19:38-20:23 UT. This may correspond to the CME observed in MK3. The AR in the south central hemisphere appears to surge from 19:59-20:34 UT and may be related to "jet" of material observed in PICS. (td) PICS: No apparent eruptive activity on the limb. The AR located in the South central hemisphere appears to emit a "jet" of material from 19:53-20:25 UT which travels southward very quickly. Not sure if this classifies as an eruptive event. (td) 3/09/1999 1999d068 Mk3 data: 17:05 -> 22:04 No apparent coronal activity. (td) CHIP: Flare event in AR near east limb from 18:34-19:34 UT. There were clouds during this period so event may not show up in animations for the day. (td) PICS: There is a flare event on the eastern disk near PA 110 which seems to correspond with event seen in CHIP data. PICS limb data shows an EPL at PA 120 which ends by 19:25UT. A start time for the EPL could not be determined due to clouds. (td) 3/10/1999 1999d069 No data taken at MLSO today. 3/11/1999 1999d070 Mk3 data: 17:28 -> 22:08 No apparent coronal activity. (td) LASCO reports a possible halo CME extending from PA 140 -> 270. Since there is no corresponding EIT activity, they report that it is a possible backside CME. They estimate its' speed to be ~210 km/s at PA 215. Later in the day they ammended the report to say that the event was possible a frontside event. (td) CHIP: There is some material which may be leaving the AR in the SW quadrant but due to the time cadence of the animation, it is difficult to tell. I will amend this entry once the full dataset from this day arrives. (td) (Ammended 3/26/99) There is some activity in the southwestern AR but nothing appears to erupt from it, it just looks like an "active" active region. There is some material which appears to leave the AR in the SE, slowly travelling SW-ward but this also does not appear eruptive. (td) PICS: Really quiet day on limb. AR in SW quadrant shows some activity, but no apparent eruptive activity seen. (td) 3/12/1999 1999d071 No MK3 data. CHIP: No apparent eruptive activity. (td) PICS: No apparent eruptive activity. (td) 3/13/1999 1999d072 No data taken at MLSO today. 3/14/1999 1999d073 No data taken at MLSO today. 3/15/1999 1999d074 No MK3 data. CHIP: Large APL at PA 310-330 degrees. Large AR in NW quadrant. No apparent eruptive activity. (td) PICS: Large APL at PA 310. No apparent eruptive activity. (td) 3/16/1999 1999d075 Mk3 data: 17:10 -> 20:21 No apparent coronal activity. (td) CHIP: Large APL visible at PA 320. Large AR in NW quadrant. No apparent eruptive activity. (td) PICS: EPL at 320 degrees is visible in limb data. Possible flare in eastern disk AR (17:25-21:04 UT). AR appears to brighten and then subsides toward the end of the day. (td) 3/17/1999 1999d076 No data taken at MLSO today. 3/18/1999 1999d077 Mk3 data: 17:04 -> 20:40 No apparent coronal activity. (td) CHIP: EPL at PA 305 can be seen but it is interrupted by clouds. (20:57-21:54 UT). PICS: EPL not visible in limb images due to cloud obscuration. No apparent eruptive activity. (td) 3/19/1999 1999d078 Mk3 data: 17:23 -> 21:13 Few images taken today due to clouds. No apparent coronal activity visible in images that were taken. (td) CHIP: No apparent eruptive activity. (td) PICS: No apparent eruptive activity. APL at PA35 degrees. (td) 3/20/1999 1999d079 No data taken at MLSO today. 3/21/1999 1999d080 No data taken at MLSO today. 3/22/1999 1999d081 Mk3 data: 21:48 -> 22:28 No apparent coronal activity. (td) CHIP: No apparent eruptive activity. (td) PICS: No apparent eruptive activity. (td) 3/23/1999 1999d082 Mk3 data: 17:26 -> 22:36 No apparent coronal activity. (td) CHIP: Filter temperature problems. Only one image from the day.(td) PICS: No apparent eruptive activity. (td) 3/24/1999 1999d083 Mk3 data: 17:29 -> 22:37 Very faint CME centered at PA 296 degrees. Appears as an elongated loop structure which appears to have a cavity underneath. It is visible in MK3 from 19:26-20:32 UT and has an approximate width of 11 degrees. Seems to be a slow moving structure. (td) CHIP: No data. PICS: EPL @PA 235 can be seen in the disk images from 19:19-21:17ut. Appears to lift off of limb and travel due eastward over surface of disk. Seems to stay close to disk surface but it is difficult to tell. (td) 3/25/1999 1999d084 Mk3 data: 17:21 -> 21:08 Data quality poor due to clouds throughout the day. No images were usable. (td) CHIP: No data PICS: filament in NE quadrant shows some activity surrounding it. Activity appears as a brightening on each side of the filament which begins at the top of the filament and travels southward, spreading apart as it goes. (td) 3/26/1999 1999d085 No MK3 data. 3/27/1999 1999d086 No MK3 data. 3/28/1999 1999d087 No data taken at MLSO today. 3/29/1999 1999d088 Mk3 data: 19:08 -> 20:36 Short day observing day due to clouds. No apparent coronal activity. (td) CHIP: No data. PICS: No apparent eruptive activity. Large filament in disk images near N. Polar region. (td) 3/30/1999 1999d089 No MK3 data. CHIP: No apparent eruptive activity. (td) PICS: No apparent eruptive activity. (td) 3/31/1999 1999d090 No data taken at MLSO today. 4/01/1999 1999d091 Mk3 data: 17:48 -> 22:11 No apparent coronal activity. (td) CHIP: EPL @PA 55 degrees (18:32-18:50 UT). Nearby material swirls southward very quickly. (td) PICS: EPL @PA 50 degrees (18:28-18:58 UT). Material appears to lift off and then settle back down. Filament on disk possibly associated with EPL disappears ~18:45 UT. (td) 4/02/1999 1999d092 Mk3 data: 16:48 -> 18:22 No apparent coronal activity. (td) PICS: APL at PA320. No apparent eruptive activity. (td) CHIP: APL at PA330. No apparent eruptive activity. (td) 4/03/1999 1999d093 No data taken at MLSO today. 4/04/1999 1999d094 No data taken at MLSO today. 4/05/1999 1999d095 Mk3 data: 19:54 -> 22:12 No apparent coronal activity. (td) PICS: Poor contrast due to clouds. No apparent eruptive activity. (td) CHIP: Large AR in NE and SE quandrants. No apparent eruptive activity. (td) 4/06/1999 1999d096 Mk3 data: 18:44 -> 21:35 Poor quality images due to clouds. No apparent coronal activity. (td) PICS: No apparent erutive activity. Large filament on SE limb appears to arc over limb. (td) CHIP: Large AR's in NE, SE, and SW quadrants. APL @PA 45 degrees. No apparent coronal activity. (td) 4/07/1999 1999d097 Mk3 data: 17:00 -> 22:00 Poor data quality due to clouds. No apparent coronal activity. (td) PICS: Limb data shows tiny-looking eruptions (spicules?) which seem to jet out and then return to limb. Disk data shows a possible flare event in AR in SW quadrant, it appears as a brightening which travels SE-ward from center of AR. The AR in the NE quadrant shows some activity as well, but doesn't appear to be a flare event. (td) CHIP: Filament on central meridian appears to erupt with the material on the east side of filament travelling outward and the western-most material appears to drain back down to the surface. This is evident in the velocity data as well. Velocity data also shows some structure motion coming from the AR in the SW, travelling Northward. (td) 4/08/1999 1999d098 Mk3 data: 19:21 -> 19:43 No coronal signal in images due to clouds. No activity noted. (td) PICS: Contrast in disk images poor due to clouds. No solar activity visible in limb data. Filament across south polar region. No apparent eruptive activity. (td) CHIP: Filament(?) on S central meridian appears to eject some material but it is difficult to say for sure if this is an eruption of some kind. (td) 4/09/1999 1999d099 Mk3 data: 17:55 -> 20:27 No coronal signal in images due to clouds. No activity noted. (td) CHIP: Possible EPL at PA 120 from 18:46-20:35 UT. This EPL is more evident in velocity data where an expanding loop can be seen. Further, the portion of the prominence visible on disk (the filament) disappears at a time coincident with the eruption. Clouds prevent any detailed obseration but there is activity seen in the AR on central meridian, velocity data suggest that this activity may be a filament eruption. (td) PICS: Poor contrast due to clouds. There is an AR on central meridan which brightens from 18:11-19:38 UT but it is extremely difficult to tell if anything erupts because the image is shifting around quite a bit due to cloud related pointing problems. (td) 4/10/1999 1999d100 No data taken at MLSO today. 4/11/1999 1999d101 No data taken at MLSO today. 4/12/1999 1999d102 Mk3 data: 16:47 -> 20:08 No coronal signal in images due to clouds. No activity noted. (td) CHIP: Large APL at PA 300-320. Large filament across S polar region evident. No apparent eruptive activity. (td) PICS: Large APL at PA 300-320. AR's in NW and SE quads. Large filament stretching across S polar region. No apparent eruptive activity. (td) 4/13/1999 1999d103 Mk3 data: 16:44 -> 20:16 No apparent coronal activity. (td) CHIP: AR in SE quadrant (near south-central meridian), shows some activity, possibly a surge? Appears as an increase in absorption on the disk. Difficult to determine if anything is erupting or not. Velocity data suggests that material is travelling toward surface (away from observer). (td) PICS: Two ribbon flare in AR in SE quadrant from 17:37 UT until the end of observing day. Flare seems coincident with event mentioned in CHIP log. Material seems to spread eastward along surface of disk. This is consistent with CHIP velocity data showing motion away from observer (material is travelling away from us toward limb). There is also a large filament stretched across the S polar region. (td) 4/14/1999 1999d104 Mk3 data: 17:13 -> 21:02 No apparent coronal activity. (td) PICS: AR in SW quadrant brightens briefly (18:37-18:58 UT). Large filament stretching across south polar region. No apparent eruptive activity. (td) CHIP: AR's in NW and SW quadrants. Large filament along south pole. No apparent eruptive activity. (td) 4/15/1999 1999d105 Mk3 data: 16:54 -> 19:27 No apparent coronal activity. (td) PICS: A few QP's along the limb and a number of smaller AR's and filaments on disk (except for one large filament along south pole), but no apparent eruptive activity. (td) 4/16/1999 1999d106 No data taken at MLSO today. CHIP: Data quality poor die to clouds. Large AR's in SE, SW quadrants. Large filament along south pole. No apparent eruptive activity. (td) PICS: No limb activity visible due to clouds. Disk data show Large filament stretchin across south pole. AR's in SW, SE quadrants. Small filament in NW quadrant may be lifting off the disk late in the day but it is difficult to say for certain because the data end right at about the time filament appears to lift. (td) 4/17/1999 1999d107 Mk3 data: 16:58 -> 22:27 No apparent coronal activity. (td) PICS: Filament mentioned yesterday is gone. Disk data show a disappearing filament early in the day which is gone by 18:17 UT. Filament is located on south-central meridian at about 40 degrees south latitude. Material appears to lift off and travel eastward. Tiny AR in NW quadrant brightens from 18:11-18:50 UT. (td) CHIP: Disappearing filament on south-central meridian early ine the day. Material appears to lift and then drain to either side of the center of the eruption. Velocity data shows a quick darkening followed by a brightening to either side of the center of the eruption. This is consistent with the idea that bright features in velocity data are travelling away from the observer and dark features are coming toward the observer. Most of the material appears to travel eastward along the disk. (td) 4/18/1999 1999d108 Mk3 data: 16:58 -> 22:28 No apparent coronal activity. (td) PICS: No apparent eruptive activity on the limb. Disk data shows a brightening in a tiny AR in the extreme NE quadrant (~15 degrees north, near limb). No other apparent eruptive activity. (td) CHIP: Large AR in SW quadrant appears to eject some material eastward. This is especially evident in the velocity data. Tiny AR in the NE quadrant near the limb also shows some structure motion in the velocity data which appears to be travelling away from the AR and toward the observer, travelling westward along the surface of the disk. Motion is harder to see in the HE intesity data. (td) 4/19/1999 1999d109 Mk3 data: 16:43 -> 22:09 No apparent coronal activity. (td) PICS: Possible EPL at PA 315 degrees late in the day. Begins around 21:19 UT. May be coming from behind limb. Disk data shows a couple of small AR's near the equator and a large filament across south polar region, with west end of filament dipping toward pole. No apparent eruptive activity. (td) CHIP: Possible EPL @PA 320 degrees. Begins ~ 21:19UT. (td) 4/20/1999 1999d110 Mk3 data: 16:38 -> 21:44 Very faint CME centered at PA 247 degrees. Visible in MK3 FOV from 18:44-19:42 UT. Preliminary width estimate is 22 degrees. Helmet streamer South of CME appears to be deflected southward slightly. Faint LOOP structure visible. No CAVITY or CORE feature evident in the direct images. (td) PICS: Very quiet day on limb. No apparent eruptive activity. Disk data is pretty quiet as well. A few AR's scattered about and a large filament stretching across south pole but no apparent eruptive activity. (td) CHIP: Possible EPL @ PA 310 from 17:38-18:16 UT. Velocity data shows a corresponding brightness at this location. (td) 4/21/1999 1999d111 Mk3 data: 16:55 -> 22:02 No apparent coronal activity. (td) PICS: Possible EPL at PA 220 degrees but it is difficult to say for certain. Material appears to travel over limb down to surface. Disk data shows a few scattered AR's and filaments but no apparent eruptive activity. (td) CHIP: APL @PA 310. Suspended material off limb @PA 340 degrees. May be a prominence eruption but there isn't enough detail to tell for sure. Velocity data show some structure motion in the SW quadrant which appears to move eastward. (td) 4/22/1999 1999d112 Mk3 data: 17:13 -> 20:19 No apparent coronal activity. (td) PICS: APL @PA 140. A few AR's and filaments. No apparent eruptive activity. (td) CHIP: Very small (filament?) lifts off of disk at 20:49-21:28 in NE quadrant. Material appears to travel southward. Velocity data shows a corresponding darkening of this event. (td) 4/23/1999 1999d113 Mk3 data: 16:40 -> 22:38 No apparent coronal activity. (td) PICS: Nice EPL at PA 150 degrees. Some material is ejected while the rest can be seen draining back down. Eruption starts at ~18:13 UT. Ejected material separates at ~19:22 UT. (td) CHIP: EPL visible in CHIP from 18:25-20:43 UT. Some material appears to leave the limb while most seems to loop back toward the limb. (td) 4/24/1999 1999d114 Mk3 data: 02:37 -> 23:05 No apparent coronal activity. (td) PICS: Short day due to alignment tests. AR in NE quadrant appears to brighten early in the day. No apparent eruptive activity. (td) CHIP: Eruption of either a filament or AR in extreme NW quadrant near the limb from 18:14-18:39 UT. Location of event on disk makes it diffcult to say for sure what actually erupted. Active filament in SE quadrant from 19:51-21:32 UT. Active filament shows up in velocity data as a darkening followed by a brightening as the filament recedes. (td) 4/25/1999 1999d115 Mk3 data: 02:26 -> 18:41 Faint CME centered at PA 265 degrees, width is approximately 20 degrees. Visible in the MKIII instrument from 17:44-17:57 UT. Unfortunately, data for this day is marred by electronic noise and a few satruated pixels making identification of features extremely difficult. Probably the most noticable feature is a dark depleted region which may be the CAVITY of the event. No other features apparent. It may be possible to obtain more details from subtraction images. (td) PICS: Short day due to PICS maint. Observations stopped at 18:45 UT. No apparent eruptive activity. (td) CHIP: Break in the day due to maintenence. No apparent eruptive activity. (td) 4/26/1999 1999d116 Mk3 data: 16:43 -> 22:22 Exceedingly faint motion in MK3 FOV from 18:58-20:27 UT. Motion is centered at PA 261 degrees and the structure associated with it appears to be about 36 degrees wide. I hesitate to call this a CME because the data for this day is riddled with instrument problems. The motion observed does appear to be in the corona and not associated with the instrument errors. (td) CHIP: Possible filament eruption in NW quadrant from 18:46-19:34 UT. Material appears to lift off and travels SW-ward. Active filament between two AR's in NE quadrant as well. (td) PICS: Pointing errors and intstrument maintenence made viewing activity difficult. No apparent eruptive activity. (td) 4/27/1999 1999d117 Mk3 data: 00:28 to 4991:39 No apparent coronal activity. (td) PICS: No apparent eruptive activity. (td) CHIP: Some motion in AR in NE quadrant. Motion travels N-ward and something appears to travel southward. (td) 4/28/1999 1999d118 Mk3 data: 16:51 -> 23:29 No coronal signal in image today due to clouds. No activity noted (td). PICS: No activity visible in limb data due to clouds. Contrast poor in disk images. Large AR's on N central meridian. No apparent eruptive activity. (td) CHIP: Small disappearing filament near equator ~19:01-19:43 UT. 4/29/1999 1999d119 Mk3 data: 16:59 -> 23:03 No apparent coronal activity. (td) PICS: No apparent eruptive activity. (td) CHIP: No apparent eruptive activity. (td) 4/30/1999 1999d120 Mk3 data: 16:43 -> 21:33 No apparent coronal activity. (td) PICS: No apparent eruptive activity. (td) CHIP: Possible prominence eruption at PA 250 early in the day. Hints of activity can be seen in CHIP intensity data but event is most noticable in velocity data. (td) 5/01/1999 1999d121 Mk3 data: 16:59 -> 22:33 Noisy data. No apparent coronal activity. (td) PICS: Very large active filament arching over NE limb. Active throughout the day. No apparent eruptive activity. (td) CHIP: Large filament arching over east limb shows lots of activity. Large AR near east limb. No apparent eruptive activity. (td) 5/02/1999 1999d122 Mk3 data: 16:59 -> 22:12 Noisy coronal data. No apparent coronal activity. (td) PICS: Disappearing filament in progress at start of observing day and lasts until 18:12 UT. Filament is located initially over the AR in the NE quadrant and appears to lift off almost immediately. (td) CHIP: Very interesting eruptive activity in AR in NE quadrant coinciding with activity mentioned in PICS. (td) 5/03/1999 1999d123 Mk3 data: 18:00 -> 21:44 No coronal signal in data for today. No activity noted. (td) PICS: There are three AR's in the northern hemisphere which brighten perceptibly and almost simulatneously. One is in NE quadrant (and is the brightest), another is in the NW quadrant near the meridian (and may be a surge), the third is in the NW quadrant, near the west limb. These brightenings may not be related to each other. (td) CHIP: There is some activity visible in the three AR mentioned above but no apparent eruptive activity was visible. (td) 5/04/1999 1999d124 Mk3 data: 17:45 -> 22:10 No apparent coronal activity. (td) PICS: AR in NE quadrant appears to flare from 18:22-19:28 UT. The southern portion of the nearby filament remains intact, while the northern portion appears to lift off and a good percentage of the material appears to drain back down. This is evidenced by the slightly less dense appearance of the northern part of the filament after the flare. Another filament near the NE limb (a little NE of the flaring AR) disappears just after the flare. A compressive wave can also be seen originating from the area of the disappearing filament travelling outward. (td) CHIP: Flare mentioned in PICS log is visible. Disappearing filament and the compressive wave which follows it is also visible in CHIP data. (td) 5/05/1999 1999d125 No MK3 data. CHIP: Data for this day has large data gap due to spar tracking problems. No apparent eruptive activity. (td) PICS: Contrast poor due to clouds. Short day due to camera maintenence. Active filament near NE limb. Large filament in NW quadrant. AR on central meridian. No apparent eruptive activity. (td) 5/06/1999 1999d126 Mk3 data: 16:51 -> 22:18 No apparent coronal activity. (td) CHIP: Lots of active filaments on disk but no apparent eruptive activity. (td) PICS: New camera was installed today. Data begins around 19:45UT. Lots of filaments on disk. Large filament in NW quadrant, along with a large AR in the same region. No apparent eruptive activity. (td) 5/07/1999 1999d127 Mk3 data: 16:28 -> 22:06 No apparent coronal activity. (td). CHIP: Temperautre controller has failed. Instrument down until it is replaced. No activity noted. (td) PICS: AR in NE quadrant brightens from 18:36-20:05 UT, possibly a flare. Event seems to correspond to a possible surge of material seen in limb data on the NE limb, around the same time period. (td) 5/08/1999 1999d128 Mk3 data: 16:59 -> 20:26 No apparent coronal activity. (td) PICS: Apparent activity in AR's located in NW quadrant, near west limb (possible flare?). Activity is in progress at beginning of observing day and is gone by 19:44 UT. Scattered filaments and AR's on disk. (td) CHIP: No observations. 5/09/1999 1999d129 Mk3 data: 17:04 -> 22:31 Very large, bright CME centered at PA 304 degrees from 18:04-18:41 UT. Nice LOOP/CAVITY/CORE structure. Width is approximately 33 degrees. The helmet streamer to the north seems to be deflected, or pushed away as the CME travels outward, in fact, the CME itself seems to be pulled northward. The event is travelling relatively quickly through the MK3 FOV. (td) PICS: Small EPL which seems to be associated with CME. Possible flare in NW quadrant later in the day, visible from 22:19 until the end of observing day. CHIP: No observations. 5/10/1999 1999d130 Mk3 data: 16:30 -> 22:09 Very faint CME at PA 314 visible in MK3 from 17:45-18:00 UT. Width is approximately 13 degrees. This event is very faint and thin, spreading slightly as it travels outward. There were no discernable features but perhaps an outer loop could be seen in subtractions. (td) PICS: Disappearing filament in SW quadrant. Begins ~17:39 UT. Not all material appears to leave disk. (td) CHIP: No observations. 5/11/1999 1999d131 Mk3 data: 16:37 -> 22:01 Somewhat faint CME centered at PA 115 degrees late in the day from 21:38-21:57 UT. Width is approximately 42 degrees. This is a wide, fast CME with a nice LOOP and CAVITY feature. No prominence material could be seen. Trajectory measurements possible direct images but event will be much easier to track in subtractions. (td) PICS: Lots of movement on disk today. Active filaments in NE quadrant. The AR in the SE quadrant brightens twice, I believe the second brightening (which occurs at the end of the observing day) may be a flare. (td) CHIP: No observations. 5/12/1999 1999d132 Mk3 data: 16:52 -> 22:26 There is some sort of structure motion in the corona from 18:48-21:11 UT. This may be a CME but it is difficult to say for certain because there was a data dropout due to clouds at MLSO during this time. The motion is centered at PA 231 with an approximate width of 20 degrees. (td) PICS: APL at PA 220 degrees. May be somewhat related to motion described above. The APL does not erupt, however. Disk data shows a large active filament in the SW quadrant and some structure motion is visible in filament located in the NE quadrant. No apparent eruptive activity. (td) CHIP: No observations. 5/13/1999 1999d133 Mk3 data: 20:40 -> 22:44 Short day due to clouds. No apparent coronal activity. (td) PICS: No apparent eruptive activity. (td) CHIP: No observations. 5/14/1999 1999d134 Mk3 data: 16:26 -> 21:55 No apparent coronal activity. (td) PICS: Disappearing filament in SE quadrant from 20:19-21:22UT. Filament appears as a small dot on the surface which lifts off and travels SE-ward. (td) CHIP: No observations. 5/15/1999 1999d135 Mk3 data: 16:50 -> 22:32 No apparent coronal activity. (td) PICS: Large APL at PA 40 and a possible EPL at PA 110 late in the day. (td) 5/16/1999 1999d136 Mk3 data: 17:12 -> 20:31 Data quality rather poor today due to clouds. No apparent coronal activity. (td) PICS: Lots of clouds today. Possible EPL at PA 260-270 degrees but clouds make it hard to see. AR in SW quadrant is very active and seems to coincide with EPL. (td) CHIP: No observations. 5/17/1999 1999d137 No MK3 data. 5/18/1999 1999d138 Mk3 data: 16:26 -> 20:04 MK3 Data for the day suffers from polarization darkening effects due to bright sky conditions at the observatory. No apparent coronal activity. (td) PICS: AR in NE quadrant is showing lots of interesting activity. It appears to brighten throughout the day and swirl as it does so. Filament just to the north of it may lift off at the end of the day but it is hard to tell for sure because the data end. (td) CHIP: No observations. 5/19/1999 1999d139 Mk3 data: 17:09 -> 22:06 MK3 data has some polarization darkening early in the day. No apparent coronal activity. (td) PICS: Large AR in NE very active. No apparent eruptive activity. (td) CHIP: No observations. 5/20/1999 1999d140 Mk3 data: 16:56 -> 22:08 There are two possible CME's today, both are moving very slowly. Both events are on west limb. One is centered at PA 273 degrees with an approximate width of 22 degrees, visible in MK3 from 17:45-2049. The second one begins a little later, centered at PA 273 degrees, width approximately 44 degrees. Visible from 20:01 UT until the end of the observing day. There appears to be a LOOP and depleted CAVITY region in both events but no apparent core feature in either of them. (td) PICS: Very dim APL at about 270 degrees but it does not appear to erupt. Lots of AR's and filaments on the disk but no apparent eruptive avtivity. (td) CHIP: No observations. 5/22/1999 1999d142 Mk3 data: 16:49 -> 19:08 No apparent coronal activity. (td) PICS: Possible EPL @PA 130-150 degrees. Much of the material appears to drain back to surface but a small amount may have actually left the limb. AR in NW quadrant of disk appears to brighten late in the observing day but it is too late to tell for certain if it was a flare. Active filament in AR in SW quadrant. (td) CHIP: No observations. 5/23/1999 1999d143 Mk3 data: 16:56 -> 22:39 No apparent coronal activity. (td) PICS: Possible flare from AR in SE quadrant (17:29-18:58 UT). AR in NW quadrant is active as well but doesn't appear to flare. (td) CHIP: No observations. 5/24/1999 1999d144 Mk3 data: 16:38 -> 22:12 No apparent coronal activity. (td) PICS: Two AR's appear to demonstrate eruptive activity today. One is in the SE quadrant (it's the same one mentioned yesterday): it erupts from 17:35-18:32 UT. The other is in the NW quadrant near the west limb. It erupts from 17:59-18:50 UT. CHIP: No observations. 5/25/1999 1999d145 Mk3 data: 16:23 -> 22:10 No apparent coronal activity. (td) PICS: Very active day on the disk. Three AR's all appear to erupt. One is near the central meridian in the south. The other two are located in the north, one near the east limb and the other near the west limb. It appears as though they are flares. (td) CHIP: No observations. 5/26/1999 1999d146 Mk3 data: 16:55 -> 22:15 Exceedingly faint motion in the SE from 21:00 UT until the end of the observing day. Possibly a CME but difficult to tell for certain due to instrument noise. Motion is centered at PA 128 degrees, and has an approximate width of 25-30 degrees. (td) PICS: EPL @ PA 130 from 19:23-22:09UT. Eruption seems to be located on far side of limb because there is no filament visible on the disk at that location. Material appears to whip over from far side to near side leg. Only a portion of material seems to leave the limb. Most seems to stay behind. Nice flare from AR in NE quardant from 19:13-20:46 UT. Possible surge on SW limb at PA 250 from 18:58-19:22 UT. The surge seems to be over the limb. CHIP: No observations. (td) 5/27/1999 1999d147 Mk3 data: 16:58 -> 22:03 Very wide, but faint CME centered at PA 77 degrees visible from 18:17-19:37 UT. Width is approximately 70 degrees. This CME appears to have a faint outer LOOP and CAVITY structure and there is a feature at PA 59 degrees which may be prominence CORE material. This CORE feature appears as a bright sliver which moves upward during the CME. This CME might best be viewed using subtractions. (td) PICS: Large EPL @PA 65 from 18:46-19:31UT. Material flows out of a thin column. Some goes out, but more of it seems to return to limb. There is no filament visible at this location in disk data. Filament eruption in AR in SW quadrant from 20:00-20:54 UT. Some material seems to lift off and leave the disk and some seems to stay behind and return to the disk. CHIP: No observations. (td) 5/28/1999 1999d148 Mk3 data: 16:27 -> 22:06 No apparent coronal activity. (td) PICS: Active filament in SW quadrant. No apparent erutpive activity. (td) CHIP: No observations. (td) 5/29/1999 1999d149 No MK3 data. PICS: Data quality poor due to clouds. No apparent eruptive activity. (td) CHIP: No observations. 5/30/1999 1999d150 Mk3 data: 20:35 -> 22:17 No apparent coronal activity. (td) PICS: Short observing day due to clouds. No apparent eruptive activity. (td) CHIP: No observations. 5/31/1999 1999d151 No data taken at MLSO today. 6/01/1999 1999d152 Mk3 data: 16:30 -> 22:08 Somewhat faint CME centered near the North polar region from 18:26-18:53. CME appears centered at about 336 degrees and has an approximate width of 44 degrees. This event appears somewhat strange in MK3 and this may be due to the orientation of the CME. There is an outer LOOP visible which stretches across the pole and appears to move rather quickly. Following the loop is what may be prominence material centered at PA 4 degrees and travelling northward more slowly than the LOOP. The width of this material is about 39 degrees. It's motion coincides with the motion of the LOOP. (td) PICS: Possible EPL at PA 310-350 from 18:38-19:08 UT. Appears faint in limb data, possibly because it is occuring over the limb. There is no corresponding filament visible in disk data. CHIP: No observations. 6/02/1999 1999d153 Mk3 data: 16:42 -> 22:17 Very bright CME centered at PA 294 degrees. This event has a well defined LOOP/CAVITY/CORE structure visible in the MK3 field of view from 20:47-21:32 UT. Approximate width of the outer LOOP structure is approximately 46 degrees at its widest. (td) PICS: Small filament in NW quadrant, near equator, disappears 20:27-21:22 UT. Material lifts and appears to travel southward along field lines, toward large AR near south-central meridian. AR in NW quadrant, near limb, flares from 19:21-20:21 UT. (td) CHIP: No observations. 6/03/1999 1999d154 Mk3 data: 16:57 -> 21:05 Possible structure motion in the low corona (I hesitate to call this a CME) centered at PA 226 degrees with an approximate width of 33 degrees. This motion is very faint and I could probably be convinced that it isn't even there, but I thought I'd make a note of it. Motion is visible from 17:08 until the end of observing day. (td) PICS: EPL in progress early in the day at PA 280 degrees. Visible until 17:07 UT. Not very bright in limb data. AR near west limb appears to eject material-coinsiding with EPL visible in limb data. (td) CHIP: No observations. 6/04/1999 1999d155 Mk3 data: 16:27 -> 21:59 No apparent coronal activity. (td) PICS: EPL in progress @PA 30 degrees. Material lifts up and most of it loops back down to limb. Hard to say for certain how much material left the limb. Gone by 20:22 UT. (td) CHIP: No observations. (td) 6/05/1999 1999d156 Mk3 data: 16:44 -> 21:12 No apparent coronal activity. (td) PICS: Swirl of activity around AR's in NE quadrant, near limb. No apparent eruptive activity. (td) CHIP: No observations. 6/06/1999 1999d157 Mk3 data: 16:44 -> 22:11 No apparent coronal activity. (td) LASCO and EIt observed a full halo CME, 1999/06/08, with first appearance in C2 at 21:26 UT. EIT observations show that the halo is in fact multiple events, all occurring behind the limb. (from Simon Plunkett) PICS: Lots of AR's and filaments, primarily along mid-north and -south latitudes. No apparent eruptive activity. (td) CHIP: No observations. 6/07/1999 1999d158 Mk3 data: 16:28 -> 21:22 No apparent coronal activity. (td) PICS: Filament in NE quadrant appears to lift off of surface ~18:19 UT. Some material appears to return but it is difficult to say how much left and how much remained behind. (td) CHIP: No observations 6/08/1999 1999d159 Mk3 data: 17:34 -> 22:05 No apparent coronal activity. (td) PICS: Possible EPL over NW limb ~PA 290 from 20:34-21:01 UT. This event appears to occur over the limb. Cannot determine if any material leaves the limb. Possible flare from AR in NE quadrant, near central meridian from 17:51-19:12 UT. (td) CHIP: No observations. 6/09/1999 1999d160 Mk3 data: 16:53 -> 21:58 No apparent coronal activity. (td) PICS: Faint EPL at PA 340 degrees from 17:05-17:34 UT. Appears to be over the limb. Flare and possible filament eruption. from AR in NW quadrant, near meridian, from 18:51-21:31 UT. Faint filament to north of this AR may be lifting off. AR in NW quadrant, near limb, brightens from 20:40-21:07 UT and some filament material travels westward, toward limb. (td) CHIP: No observations. 6/10/1999 1999d161 Mk3 data: 16:32 -> 22:05 No apparent coronal activity. (td) PICS: Large active prominence at PA 30-50 degrees. Prominence is active thoroughout the day. AR in NW quadrant brightens throughout the day but appears brightest at about 20:57 UT. This may be a flare. (td) CHIP: No observations. 6/11/1999 1999d162 Mk3 data: 18:58 -> 20:03 MK3 data quality poor due to clouds. (td) PICS: Contrast poor due to clouds. Structure motion along filament channel in AR in NW quadrant. (td) CHIP: No observations. 6/12/1999 1999d163 Mk3 data: 16:58 -> 22:16 No apparent coronal activity. (td) LASCO and EIT observed a partial halo CME late on Friday, 1999/06/12. The event began in EIT at about 04:36 UT, with an eruption and dimming in the corona to the north and west of active region AR 8569 (located at N20 W41). This was followed at 22:12 UT by an eruption an active region 8583 at S13 E46 (Gareth Lawrence -GSFC) PICS: Possible EPL at PA 255 ~ 19:30 UT. Very fast and dim. Large flare in NW quadrant, 21:10-end of observing day. Motion seems to travel northward. (td) CHIP: No observations. 6/13/1999 1999d164 Mk3 data: 16:52 -> 21:49 No apparent coronal activity. (td) PICS: Possible disappearing filament in SE quadrant. Filament appears progressively smaller throughout the day. Data end before it is gone entirely. AR near NW limb appears to flare ~21:21UT. AR on NE limb shows motion, possible associated with a flare, travelling toward north pole early in the day. (td) CHIP: No observations. 6/14/1999 1999d165 Mk3 data: 16:22 -> 22:03 No apparent coronal activity. (td) PICS: Possible surge @PA 275 ~20:47UT. Only visible in one image. (td) CHIP: No observations. (td) 6/15/1999 1999d166 Mk3 data: 17:13 -> 22:07 Data quality poor late in the day due to high cirrus clouds. No apparent coronal activity. (td) PICS: No apparent eruptive activity. (td) CHIP: No observations. 6/16/1999 1999d167 Mk3 data: 17:00 -> 22:20 No apparent coronal activity. (td) PICS: Possible EPL @PA 250 degrees in progress at beginning of observing day. Data is somewhat dim so it is difficult to determine how much material actually lifted off. Gone by 17:49UT. Disk data shows an interesting, very small brightening next to AR in NW quadrant. Small jet of material seems to shoot out from it. Looks too small to be a flare. Event occurs from 17:21-20:36 UT. (td) 6/17/1999 1999d168 Mk3 data: 16:53 -> 22:19 CME centered at PA 306, visible in MK3 from 17:30-17:53 UT. LOOP and CAVITY structure is evident and I think there is a dim CORE visible. Width is approximately 33 degrees. (td) PICS: Filament associated with AR in South is active. Surge appears over limb ~PA 290 from 17:27-18:22 UT, may be associated with CME seen in MK3. This would suggest that the CME is partially over the west limb. (td) 6/18/1999 1999d169 No data taken at MLSO today. 6/19/1999 1999d170 Mk3 data: 16:58 -> 22:18 A rather fast moving CME centered at PA 280 degrees is visible inn MK3 from 18:40-19:29 UT. The event appears to have a LOOP/CAVITY/CORE structure. The approximate width of the CME is 29 degrees. The motion of the event suggests that the CME is oblique WRT line of sight, the southern leg appears closer to us than the Northern leg. An examination of H-alpha, or CHIP data from a few days earlier may provide some insight into the exact orientation of the CME. (td) PICS: Three possible EPL's. One is at PA 290 visible from 18:47-19:21 UT. The second is at PA 320 visible from 20:43-22:18UT. The third EPL is on east limb at PA 80, visible from 18:53-19:15 UT. Appears to be moving very fast. AR on East limb appears to flare from 18:46-19:14, which seems to coincide with the east limb EPL mentioned above. (td) 6/20/1999 1999d171 Mk3 data: 16:55 -> 21:52 No apparent coronal activity. (td) PICS: A few small QP's along the limb. Possible surge or EPL at PA 230 from 19:08-19:35 UT. Bright flare near NE limb 19:04-19:49 UT. Another flare (but not as bright) near SW limb, appears almost simultaneously with the first flare from 19:07-19:19 UT. (td) 6/21/1999 1999d172 Mk3 data: 19:08 -> 20:43 Short observing day at observatory due to equipment maintenence. No apparent coronal activity. (td) 6/22/1999 1999d173 Mk3 data: 16:30 -> 22:10 No apparent coronal activity. (td) LASCO and EIT observed a halo CME on 1999/06/22, apparently associated with an M1 flare in AR 8592 (N24E30). EIT observed the flare in 195 A images beginning at 18:24 UT, with post-flare loops for several hours afterwards. The CME was first visible in LASCO C2 at 18:54 UT as a bright, thick front in the NE. This front later became a full halo, although it was very faint in the S. The projected speed measured in C3 at PA 40 (the brightest part of the leading edge) was 740 km/s. (Simon Plunkett) 6/23/1999 1999d174 Mk3 data: 17:20 -> 22:17 No apparent coronal activity. (td) 6/24/1999 1999d175 Mk3 data: 17:00 -> 00:26 No apparent coronal activity. (td) CHIP: Reinstalled today. No activity noted. (td) 6/25/1999 1999d176 Mk3 data: 16:31 -> 22:05 No apparent coronal activity. (td) PICS: No observations. CHIP: No apparent eruptive activity. (td) 6/26/1999 1999d177 Mk3 data: 17:02 -> 22:22 No apparent coronal activity. (td) PICS: No observations. CHIP: Two large AR's but no apparent eruptive activity. (td) 6/27/1999 1999d178 Mk3 data: 16:57 -> 22:24 No apparent coronal activity. (td) LASCO and EIT observed a partial halo event today, 1999/06/27. This event started in EIT with AR 8592, now located at [N 22.5 W26.9] just East of central meridian producing an M1 class flare 08:48 UT with associated wave projected over the full NE quadrent. In the SE from an un-numbered active region now coming over the limb located at S26, E78, there was a CME at 18:12 UT which is contributing to the 'halo' in the corona in LASCO. The CME first appeared in the C2 field at 08:30 with the LE on East limb due to the smaller CME in the south. At 09:06 UT the LE of the flare event is seen over the North pole at PA 343 deg. The force of these two simultaneous events produce emmission in the corona from PA 200 in W to PA 115 in East giving an extent of over 300 degrees. The speeds calculated through C2 and C3 fields to 645 km/sec at PA 344 degrees. (Kevin Schenk - GSFC) CHIP: Large AR in NW quadrant shows some motion at the end of the observing day. It appears as though the motion could be a filament eruption. Event begins ~21:45 UT. (td) 6/28/1999 1999d179 Mk3 data: 16:31 -> 21:28 Faint CME in southeast in noisy data ~20:50 until end of observations (jb) PICS: No observations. CHIP: Very strange looking 'jet-like' structure coming from AR in NW quadrant from 20:55-21:24 UT. Not quite sure what to call it. Material appears to 'whip out' from disk. (td) 6/29/1999 1999d180 No data taken at MLSO today. 6/30/1999 1999d181 Mk3 data: 17:22 -> 22:20 No apparent coronal activity. (td) CHIP: No apparent eruptive activity. (td) 7/01/1999 1999d182 Mk3 data: 16:56 -> 20:31 No apparent coronal activity. (td) PICS: No observations. CHIP: No apparent eruptive activity. (td) 7/02/1999 1999d183 Mk3 data: 16:36 -> 22:11 No apparent coronal activity. (td) CHIP: Large APL at PA 30-40 degrees. Possible EPL @PA 320 from 20:00-21:50 ut. The southern leg of the EPL appears to "whip out" while the northern-most leg seems to stay put. Possible filament eruption in AR in SW quadrant from 20:13-21:14 UT. (td) 7/03/1999 1999d184 Mk3 data: 16:54 -> 22:25 No apparent coronal activity. (td) LASCO and EIT observed a partial halo CME on Saturday, 1999/07/03. Part of the loop system connecting ARs 8602 and 8603 (NW and SW quadrants of the solar disk) begin to move off-limb around 18:36 UT in EIT images. This movement is accompanied by a dimming of the on-disk corona in the same region. The biggest changes in the off-limb structure in EIT take place some time later, after 20:24 UT. The activity is best seen in a difference movie. The CME was first visible in the C2 field at 19:54 UT, as a bright loop in the NW. It became a partial halo, extending from about PA 235 to PA 5 (apparent width about 130 degrees). The projected speed in C3 at PA 300 was 480 km/s. (Simon Plunkett - GSFC) PICS: EPL in progress at beginning of day ~PA 90-110 degrees. Gone by 19:00 UT. Lots of brightenings in AR's along N/S latitudes. No apparent eruptive activity. (td) CHIP: Possible filament eruption from AR n NW quadrant from 17:30-18:47 UT. Appears as a swirling motion in AR. I thought I saw a very faint wave travelling SE-ward from AR but I couldn't see it in velocity data so maybe it was just wishful thinking. If there was a wave, it was travelling pretty quickly. (td) 7/04/1999 1999d185 Mk3 data: 16:54 -> 19:27 Short observing day due to clouds. No apparent coronal activity. (td) PICS: Lots of clouds today. No apparent eruptive activity. (td) CHIP: A few AR's belt the N/S latitudes but no apparent eruptive activity. (td) 7/05/1999 1999d186 Mk3 data: 19:16 -> 20:50 Data quality poor due to clouds. No apparent coronal activity. (td) PICS: Lots of clouds today. No apparent eruptive activity. (td) CHIP: Short observing day due to clouds. No apparent erutpive activity. (td) 7/06/1999 1999d187 Mk3 data: 18:21 -> 21:58 No apparent coronal activity. (td) LASCO observed a full 360 degree halo CME yesterday, 1999/07/06, with first appearance in C2 at 17:06 UT. The event was highly structured over the N pole, with what appears to be prominence material behind a bright leading edge, and was less structured elsewhere. The measured speed in C3 at PA 0 (N pole) was 750 km/s. EIT images show that the event came from behind the limb, with coronal dimming visible above the limb near the N pole. (Simon Plunkett, GSFC) 7/07/1999 1999d188 No data taken at MLSO today. 7/08/1999 1999d189 No data taken at MLSO today. 7/09/1999 1999d190 Mk3 data: 16:41 -> 22:05 Very faint CME centered at PA 255 degrees. I get the distinct feeling that I'm not looking at the whole thing (primarily because I saw this event in MKIV and it looked much larger), possibly MK3 is seeing only the CME CORE material. Width of the moving material is 11 degrees. The event passes through MK3 field of view from 17:28-18:13 UT. There is a larger structure to either side of the moving material which could be the legs of the outer loop, width of those legs is approx, 30 degrees. (td) PICS: Several flares were recorded today. AR in SW quadrant appears to flare ~18:51-19:13 UT. This event seems to be preceeded by a filament eruption or at least a very active filament. A second flare occurs in the same AR a little later, but more toward the southeast ~20:43 UT. Material from this event travels along the neutral line s-east ward. Material is gone by 21:52 UT. A third flare in AR in SE quadrant appeared to flare ~17:53 and lasted until 18:24 UT. (td) CHIP: Lots of filament eruptions in CHIP today. Large AR in SW quadrant shows two (possibly three) filament eruptions. The first one appears at 18:16-19:34. This may actually be two closely spaced events. Material appears to travel SW-ward. The second eruption from this AR occurs at 20:26-22:04 UT. Material from this AR travels along field lines SW-ward. The filament located in the NE quadrant partially erupts from 19:13-20:41 UT. Only the northern half of the filament lifts off, the rest seems to remain behind. Velocity data suggest that the material is initially travelling along surface away from observer and then travels toward observer as material twists along flux rope. (td) 7/10/1999 1999d191 Mk3 data: 16:57 -> 22:25 No apparent coronal activity. (td) PICS: EPL @PA 215 (21:02-21:47 UT). This prominence may be part of the south polar crown filament visible in disk data. If so, material associated with the leg nearest to the observer appears to whip up and out toward far leg, travelling outward as it whips over. Small AR in NE quadrant appears to eject material from 18:14-19:52 UT. (td) CHIP: EPL at about PA 220 degrees from 21:05-21:35 UT. Filament eruption from loop-like filament from AR in NE quadrant, erupts from 19:04-19:34 UT. (td) 7/11/1999 1999d192 Mk3 data: 16:58 -> 20:26 No apparent coronal activity. (td) PICS: Partial disappearing filament from small filament near SE limb from 20:55-21:52 UT. Only the portion closest to limb lifts off, the rest remain behind. Wispy, filamentary material in SW quadrant, near equator disappears ~17:58 and is gone by 19:52. Small surge on SE limb 18:23-18:56 UT, PA 110 degrees. (td) CHIP: Possible EPL @PA 130 from 21:31-22:37 UT. Surge on limb at PA 100 from 18:24-18:54 UT. (td) 7/12/1999 1999d193 Mk3 data: 17:10 -> 00:35 No apparent coronal activity. (td) PICS: No apparent eruptive activity. (td) 7/13/1999 1999d194 Mk3 data: 16:25 -> 22:10 Data quality poor due to clouds. No apparent eruptive activity (td) PICS: Partial disappearing filament in SE quadrant from 00:10-01:07 UT. Approximately 1/2 of the material seems to lift off. EPL at PA 255 degrees which begins at 00:58 UT. EPL remains visible until the end of the observing day. Disappearing filament in NE quadrant, near limb from 16:24-17:39 UT. Filament eruption from AR in SE 16:57-17:39 UT. Ejection appears to travel northward from AR. Filament eruption from AR in NW quadrant, near central meridian from 21:10-21:40 UT. No much material appears to leave the region. (td) 7/14/1999 1999d195 No MK3 data. PICS: No apparent eruptive activity. (td) CHIP: No apparent eruptive acvitity. (td) 7/15/1999 1999d196 Mk3 data: 16:37 -> 22:04 No apparent coronal activity. (td) PICS: EPL @ PA 135 degrees from 18:21-19:10 UT. APL at PA 50-70 degrees. (td) CHIP: Possible EPL at PA 230 from 18:22-19:04 UT. Appears as a thin sliver of material (this may even be a large surge). Material streams outward and some of it returns to the limb. (td) 7/16/1999 1999d197 No data taken at MLSO today. 7/17/1999 1999d198 Mk3 data: 16:59 -> 22:28 No apparent coronal activity. (td) PICS: No apparent eruptive activity. (td) CHIP: No apparent eruptive activity. (td) 7/18/1999 1999d199 Mk3 data: 16:47 -> 22:36 No apparent coronal activity. (td) PICS: No apparent eruptive activity. (td) CHIP: No apparent eruptive activity. (td) 7/19/1999 1999d200 Mk3 data: 16:40 -> 22:05 No apparent coronal activity. (td) PICS: Small filament eruption from small AR near SW limb from 21:11-21:41 UT. (td) CHIP: No apparent eruptive activity. (td) 7/20/1999 1999d201 Mk3 data: 16:31 -> 21:56 No apparent coronal activity. (td) PICS: Brightening in AR on SE limb from 17:41-19:31 UT. AR in NE quadrant also shows activity throughout the day. (td) CHIP: No apparent eruptive activity. (td) 7/21/1999 1999d202 Mk3 data: 20:21 -> 22:02 Data quality poor today due to clouds. No apparent coronal activity. (td) PICS: EPL in progress at PA 50 degrees. It is gone by 17:50 UT. Loop-like filament in NW quadrant becomes disrupted at around 19:09 UT. Difficult to tell for certain if it is an eruption. (td) CHIP: Filament mentioned above is visible in CHIP data as well. (td) 7/22/1999 1999d203 Mk3 data: 16:39 -> 22:05 No apparent coronal activity. (td) PICS: AR in NW quadrant shows brightening of material along filament channel, travelling NE-ward from 18:16-19:28 UT. Large AR in NE quadrant brightens perceptibly from 20:52-22:01 UT. (td) CHIP: Possible filament eruption at AR in NW quadrant 18:09-19:37 UT. Material looks as if it is travelling along filament channel with some material returning. Velocity data suggest that the material is following a spiral trajectory NE-ward. (td) 7/23/1999 1999d204 No MK3 data taken today. MK4 data shows a slow moving CME centered at PA 121 degrees with an approximate width of 40 degrees. CORE material is visible as well as an outer LOOP (I could not make out a CAVITY feature). The CME is first visible in MK4 at 19:33 UT and slowly traverses the field of view throughout the observing day. (td) PICS: EPL at PA 300 from 21:00-21:25. Event was very small and faint. Flare in AR near N-Central meridian. Appears from 18:24-21:33 UT. (td) CHIP: AR near N-central meridian shows small bursts of activity late in the day, beginning around 20:01 UT and lasts until the end of the observing day. (td) 7/24/1999 1999d205 No MK3 data taken today. MK4: No apparent coronal activity. (td) PICS: EPL just to the south of the APL at PA 130 degrees. Occurs from 19:13-20:06 UT. Difficult to see any ejected material, most of the flow of material is toward the limb. The AR associated with the limb activity at PA 130 appears to eject material at 18:55-19:15 UT. Filament eruption from AR near N-Central meridian in NW quadrant from 20:21-21:12 UT. Small flare in SE quadrant 19:18-19:33 UT. Appears to affect nearby tiny filament to the NE. (td) CHIP: EPL mentioned above is visible in CHIP data from 17:27-18:39 UT. No other eruptive activity noted. (td) 7/25/1999 1999d206 Mk3 data: 16:58 -> 22:20 No apparent coronal activity. (td) MK4: No apparent coronal activity. (td) PICS: Very nice two-ribbon flare in NW quadrant visible in PICS from 20:05 UT until the end of the day. It begins with a filament lifting off of surface, disappears and is followed by two ribbons underneath, spreading outward from each other. Disappearing filament in SW quadrant 18:21-19:47 UT. (td) CHIP: Nice two ribbon flare visible in NW quadrant from 20:26 - 22:14 UT. Filament can be seen lifting off just prior to event. (td) 7/26/1999 1999d207 Mk3 data: 16:32 -> 22:08 No apparent coronal activity. (td) MK4: Faint CME centered at PA 117 is visible in MK4 data from 20:52 UT until the end of the day. The width of the CME is approx 30 degrees. There is a faint outer LOOP structure which can be seen expanding outward. I could not make out any CAVITY or CORE features. (td) PICS: EPL at PA 110-120 degrees. Most of the material from this eruption appears to drain back down to limb. Two possible surges at PA 75 degrees. One occurs from 17:25-18:14 UT and the other 21:24-22:05 UT. Small AR in SE quadrant appears to eject material from 18:22-19:09 UT. AR over west limb (it could only be viewed obliquely) appears to raise some material from 21:32 until the end of the observing day. (td) CHIP: EPL at PA 110-120 degrees visible in CHIP from 20:19-21:15 UT. Can't make out any ejected material, legs of prominence appear to retreat over the far side of the East limb. (td) 7/27/1999 1999d208 Mk3 data: 16:32 -> 22:46 No apparent coronal activity. (td) MK4: No apparent coronal activity. (td) PICS: APL at PA 70-80 degrees. No apparent eruptive activity on limb. Tiny disappearing filament in SW quadrant 19:09-20:39 UT. (td) CHIP: Very interesting motion near small filament near the North central meridian. Two diffuse darkenings which travel out ward from either side of the filament can be seen between 18:00-19:00 UT. Difficult to say precisely what they are but our coronal group determined that they are probably not associated with a two-ribbon flare. The filament never erupts and the event is not visible in velocity data. (td) 7/28/1999 1999d209 Mk3 data: 16:30 -> 21:00 No apparent coronal activity. (td) MK4: No apparent coronal activity. (td) PICS: Flare in AR in SE quadrant (17:38-19:22 UT) which appears to affect the nearby smaller AR to the NW by causing it to flare immediately afterward (19:22-20:52 UT). Nearby filament is disrupted but reforms after the event. Interesting wave motion near AR in NE quardaant, near limb. AR near NW limb also appears quite active. (td) CHIP: Possible filament eruption in the AR on the S meridian from 19:19-20:17 UT. A loop-like filament appears to blow out and cause a brightening in the AR in CHIP. There is also an intense brightening in AR in SE quadrant from 16:58-18:41 UT.(td) 7/29/1999 1999d210 Mk3 data: 16:51 -> 22:23 No apparent coronal activity. (td) MK4: No apparent eruptive activity. (td) PICS: Filament eruption over AR in SE quadrant, near meridian from 16:55-17:19 UT. Another one from AR near NE limb from 19:35-20:05 UT. (td) CHIP: Possible filament eruption from large AR in SE quadrant, 16:56-17:43 UT. Filament eruption in NW quadrant from 20:56-22:05 UT. Material appears to travel NE-ward. (td) 7/30/1999 1999d211 Mk3 data: 16:30 -> 21:34 Lots of clouds today. No apparent coronal activity. (td) MK4: Data quality poor due to clouds. No apparent eruptive actvitiy. (td) CHIP: Polar crown filament very active but does not appear to erupt. (td) 7/31/1999 1999d212 Mk3 data: 16:59 -> 22:13 No apparent coronal activity. (td) MK4: No apparent eruptive activity. (td) PICS: Possible filament eruptionin AR in SW quadrant, 17:50-18:43. Brightening in AR in NE quadrant (flare?), 18:15-18:40 UT. There is also a corresponding brightening due east of the flare event which is large and appears to travel along a faint filament channel. The brightening occurs at the same time as the flare mentioned above. (td) CHIP: Possible filament eruption in NE quadrant. The northern-most tip of a tenuous N/S oriented filament appears to erupt from 18:35-19:23 UT. (td) 8/01/1999 1999d213 Mk3 data: 17:00 -> 22:05 CME centered at PA 344 degrees and visible in MK3 field of view from 19:80-20:21 UT. No LOOP or CAVITY feature visible in this event, it looks as if we are seeing primarily CORE material. Width of the event is approximately 13 degrees. (td) MK4: CME centered at PA 346 degrees (at 1.9 Rsun) with an approximate width of 16 degrees at 1.75 Rsun is visible in the MK4 field of view from 19:05 - 20:27 UT. Upon the onset of the event, there is a faint LOOP followed by a CAVITY, the LOOP and CAVITY structure appears to be at an oblique angle to the observer, suggesting that it straddles the limb. The prominence material follows behind in a long, spiral shape stretching almost completely across the field of view of the MK4 instrument. The coronal group believes this to be a back- side event. (td) CHIP: Large eruption visible over the NW limb @PA 310 degrees. The event is visible from 19:11-19:41 UT. Not sure what type of eruption it is, perhaps a filament eruption associated with the CME visible in MK4. This would suggest that the event is a backside event. Possible filament eruption in NE quadrant from 18:38-19:11 UT. Seems to come from filament in smaller AR in NE quadrant. Velociry data suggest that the material is travelling away from the observer. (td) 8/02/1999 1999d214 Mk3 data: 17:25 -> 21:02 Poor data quality due to clouds. No apparent coronal activity. (td) MK4: Data quality poor due to clouds. No apparent coronal activity. (td) CHIP: Poor data quality due to clouds. No apparent eruptive activity. (td) 8/03/1999 1999d215 Mk3 data: 16:32 -> 22:08 No apparent coronal activity. (td) PICS: Possible EPL at PA 50-55 degrees. Clouds make it difficult to tell if any material lifted off of limb. Swirling activity in AR on N-central meridian. No apparent eruptive activity. (td) CHIP: Possible EPL at PA 40-55 degrees visible in CHIP data from 20:58-21:25 UT. Prominence disappears soon after lifting off of limb. (td) 8/04/1999 1999d216 No MK3 data. 8/05/1999 1999d217 Mk3 data: 16:57 -> 22:04 2 part CME. CME in progress centered at PA 72 degrees with an approximate width of 43 degrees is visible in mk3 from start of observing day -> 21:00 UT. The brightest feature is the prominence CORE material but a faint outer LOOP structure can be seen as well. Deflections. 2nd, faint front just north of first CME from ~19:48 until 21:00. Appears to be a continuation of the first loop/cavity and core.(td, jb, as) 1st Loop Width: 50 degrees (39 to 89 degrees) at 1.3 Rsun at 17:40 2nd Loop Width: 31 degrees (14 to 45 degrees) at 1.3 Rsun at 20:03 CHIP: Lots of clouds today. Possible EPL at PA 60 from 18:29-20:17 UT. (td) 8/06/1999 1999d218 Mk3 data: 17:00 -> 22:07 MK4 data from 17:00 -> 22:07 Slow, faint mound shaped CME on west limb. Speed measurement may be possible with subtraction images. Slow expansion of coronal material on west limb in progress when observations begin at 17:00. Front is best seen from ~18:00 -> 20:00 UT. Width measurement in direct images: 273 -> 297 degrees (24 deg wide) at 2.0 solar radii at 20:10 UT Remeasure using subtraction images since this is so faint. Is this the core of an earlier CME? Upon viewing LASCO C2 data: CME(s) all day on west limb. Data gap between 15:50 and 17:50 in daily movie. CME is visible out to at least 5 Rsun in C2 at 17:50 and continues until next day. MK4 probably sees core of this event. (jb) PICS: No apparent eruptive activity. (td) CHIP: No apparent eruptive activity. (td) 8/07/1999 1999d219 Mk3 data: 17:05 -> 22:11 Faint structure, possibly a CME, centered at PA 244 is visible in mk3 from 20:56-21:52 UT. Data for this time period is pretty noisy so it is difficult to say for certain whether this is a mass ejection, but I think I saw a LOOP-like structure at about this time period. I couldn't make out any other features. Approximate width if the structure is 16 degrees. (td) MK4 data from 17:05 -> 22:11 Faint structure seen in MK3 is a CME as seen in MK4. Visible from 20:52 - ~22:11 (maybe gone before 22:11). Fast, irregularly shaped CME - no clear front in direct images. Back end of core is U- shaped in 21:15 image and V-shaped by 21:37. Deflections visible just south of event. Center: ~246 degrees at 21:15 ~249 degrees at 21:52 Width: 27 degrees: 233-260 at 1.7 and at 2.0 solar radii at 21:15 32 degrees: 233-265 at 1.85 solar radii at 21:52 UT LASCO: CME visible in same location from 21:26 to ~23:50. Appears to be fast. Looks like MK3/4 is seeing the beginning of the LASCO event. (jb) (jb) PICS: No apparent eruptive activity. (td) CHIP: No apparent eruptive activity. (td) 8/08/1999 1999d220 Mk3 data: 16:56 -> 22:17 No apparent coronal activity. (td) PICS: No apparent eruptive activity. (td) CHIP: No apparent eruptive activity. (td) 8/09/1999 1999d221 Mk3 data: 16:34 -> 22:14 Possible CME (very faint) in Mk3 data: 19:29-20:59 UT. Appears as a widening of the corona which may travel outward. Motion is centered at PA 298 degrees and has an approximate width of 28 degrees. No discernable features were observed. (td) PICS: No apparent eruptive activity. (td) 8/10/1999 1999d222 No data taken at MLSO today. 8/11/1999 1999d223 Mk3 data: 16:57 -> 21:25 No apparent coronal activity. (td) MK4: No apparent coronal activity. (td) PICS: No apparent eruptive activity. (td) CHIP: No apparent eruptive activity. (td) 8/12/1999 1999d224 Mk3 data: 16:55 -> 22:03 Poor data quality due to clouds over Hawaii. No coronal activity. (td) MK4: Poor data quality due to clouds. No apparent coronal activity. (td) PICS: Possible surge on limb at PA 65 degrees from 18:37-19:15 UT. Western-most portion of polar crown filament disappears beginning around 18:45 UT. (td) CHIP: Long, thin surge at PA 60 degrees from 18:37-19:04 UT. Material appears as a thin jet shooting radially outward. Portion of North polar crown filament can be seen travelling rapidly eastward. Small filament eruption from tiny AR in SE quadrant. Visible in CHIP from 21:31-22:04 UT. (td) 8/13/1999 1999d225 Mk3 data: 16:46 -> 21:14 Mk3: No apparent coronal activity (als) PICS: Active filament at PA 50-60. No apparent eruptive activity. Small brightening in AR in SW quadrant but no apparent eruptive activity. (td) CHIP: No apparent eruptive activity. (td) 8/14/1999 1999d226 Mk3 data: 16:53 -> 21:59 Mk3: No apparent coronal activity (als) MK4: Very narrow "ray-like" CME visible in MK4 from 19:36 until 20:06. The event is centered at PA 60 with an approximate width if 7 degrees at 2.0 Rsun (approximately). (td) PICS: Large active prominence on NW limb but no apparent eruptive activity. AR near NE limb is active throughout the day. (td) CHIP: No apparent eruptive activity. (td) 8/15/1999 1999d227 No MK3 data. PICS: Data quality poor due to clouds. No apparent eruptive activity. (td) CHIP: data quality poor due to clouds. No apparent eruptive activity. (td) 8/16/1999 1999d228 Mk3 data: 16:34 -> 22:06 Mk3: No apparent coronal activity (als) MK4: Another narrow CME that may qualify for the "ray-like" CME category. Visible in MK4 from 17:22-18:35 UT and centered at PA 114. Approximate width is 9 degrees. While prominence material is the predominately visible component to this event, the is a faint outer LOOP. (td) PICS: Small EPL at PA 70. Time: 16:56,17:38 UT. Material loops over from the south to the north. Most of the material appears to return to the limb. Another, narrow EPL at PA 117 degrees which seems to coincide with MK4 CME, 17:20-18:15 UT. Material ejects in the form of a jet. Hard to say how much material leaves the limb. On the disk, the thin filament eruption mentioned in limb data is visible in disk data as well. Small filament eruption originating from small AR on the south meridian. Material ejects from the east side of the AR from 16:52-17:04 UT. (td) CHIP: Interesting looking jet-like eruption from the SE limb at PA 115 degrees from 17:24-18:15 UT. Material appears to travel radially outward in a stream. (td) 8/17/1999 1999d229 Mk3 data: 16:38 -> 22:20 Mk3: No apparent coronal activity (als) MK4: No apparent coronal activity. (td) PICS: Two ribbon flare in progress at start of observing day in NE quadrant. The flare appears to affect two nearby filaments, one small one to the NE disappears at 17:12 UT and another filament to the south also appears to be affected. (td) CHIP: Short observing session due to work on mk4. No apparent eruptive activity. (td) 8/18/1999 1999d230 Mk3 data: 17:10 -> 22:30 Mk3: No apparent coronal activity (als) MK4: No apparent coronal activity. (td) PICS: No apparent eruptive activity. (td) CHIP: Portion of large filament in the NW quadrant appears to erupt beginning at 17:42 UT. Only the northern-most tip of the filament seems affected. (td) 8/19/1999 1999d231 Mk3 data: 16:56 -> 21:58 Mk3: No apparent coronal activity (als) MK4: No apparent coronal activity. (td) PICS: No apparent eruptive activity. (td) CHIP: No apparent eruptive activity. (td) 8/20/1999 1999d232 Mk3 data: 16:37 -> 20:36 MK3: No apparent coronal activity (td) MK4: CME visible in MK4 data from 18:33-19:24 UT. The CME is centered at PA 104 degrees and has an approximate width of about 40 degrees. There is a reasonably prominent LOOP feature behind which a CAVITY could be discerned. (td) CHIP: Arcade of loops on the SE limb at PA 120 are active throughout the day but I saw no eruptions from them. There is also a large prominence on NW limb which appears to erupt but I can't tell the start time. The material is gone by 18:13 UT. (td) PICS: Large APL @PA 330-350 degrees. Material arches over northward toward the pole. Not much, if any, material leaves the limb. Nice arcade of loops in SW at PA 120 degrees. Wispy, faint material high above the surface in NW quadrant lifts off. (td) 8/21/1999 1999d233 Mk3 data: 17:05 -> 22:10 MK3: No apparent coronal activity (td) MK4: No apparent coronal activity. (td) CHIP: No apparent eruptive activity. (td) PICS: Flare visible in AR on central meridian early in the day. The brightening from the flare extends outward from the AR in both an easterly and westerly direction. (td) 8/22/1999 1999d234 Mk3 data: 16:54 -> 22:02 MK3: No apparent coronal activity (td) MK4: No apparent coronal activity. (td) CHIP: Possible filament eruption from west side of large AR in SW quadrant, 18:15-19:18 UT. Material appears to travel northward and southward from either side of AR. (td) PICS: No apparent eruptive activity. (td) 8/23/1999 1999d235 Mk3 data: 16:57 -> 22:05 MK3: No apparent coronal activity (td) MK4: No apparent coronal activity. (td) CHIP: Possible prominence eruption from large AR in SE quadrant, along the west side, 18:03-18:39 UT. Most of the material appears to return to the surface. (td) PICS: Filament eruption, associated with a flare in the AR in the SE quadrant visible from 18:00-18:19 UT. Material appears to travel NE ward. (td) 8/24/1999 1999d236 Mk3 data: 16:36 -> 22:03 MK3: No apparent coronal activity (td) MK4: No apparent coronal activity (td) CHIP: Flare from large AR in SE quadrant, 16:48-18:51 UT. (td) PICS: The flare seen in CHIP (mentioned above) looks like a two ribbon flare it is located in large AR in SE quadrant. Visible in CHIP from 16:48-18:25 UT. (td) 8/25/1999 1999d237 Mk3 data: 18:11 -> 22:54 MK3: Not many images due top maintenence work on MK4 instrument. No apparent coronal activity (td) MK4: Not much coronal activity visible due to adjustments of the instruments. No apparent eruptiive activity. (td) CHIP: Interesting filament eruption in SW quadrant, 18:05-18:59 UT. The filament eruption is followed by a circular wavefront which is is followed by an apparent two ribbon flare. There is also an active filament on the NW limb. (td) PICS: Filament eruption in SW quadrant (18:05-18:32 UT). Filament is very small and there was no visible wave as there was in CHIP data. There was a second filament eruption near NE limb (18:44-20:13 UT). Again, the filament was very small. Large AR on south-central meridian flares from 20:10-21:10 UT. Small flare from tiny AR in nW quadrant from 18:26-19:34 UT. (td) 8/26/1999 1999d238 Mk3 data: 18:11 -> 22:54 MK3: CME centered at PA 145 degrees with an approximate width of 30 degrees was visible in Mk3 data: 16:48-17:14 UT. There is an identifiable LOOP associated with this event but I could not make out any CAVITY or CORE features. (td) MK4: CME centered at PA 145 degrees, width is approximately 26 degrees. Visible from 16:52-17:44 UT. Nice LOOP and CAVITY structure but no visible core features. There is also a second, jet-like structure just to the north of the CME loop which seems to follow behind it. This may be a second CME. (td) PICS: Disappearing filament in NE quadrant from 20:29-21:35 UT. It appears to be affected by a nearby brightening so it may not actually erupt. Large AR in NE shows flaring activity throughout the day. Small filament near the south pole appears to lift off of surface @ 1735 UT. (td) CHIP: Surge visible at PA 290 from 21:18-21:57 UT. Disappearing filament in Ne quadrant visible from 20:29-21:35 UT. (td) 8/27/1999 1999d239 Mk3 data: 16:44 -> 22:11 MK3: CME visible in MK3 from 19:53-20:20 UT. Very faint LOOP and CAVITY, no visible CORE. CME is centered at PA 65 degrees at 1.8 Rsun and has an approximate width of 28 degrees at 1.6 Rsun. LOOP appears to widen slightly as it travels outward on a somewhat SE-ward trajecotry. (td) MK4: CME centered at PA 62 visible from 19:49-20:45 UT. There are two faint, large loops visible in the MK4 data. The outer one may be the loop front, followed by a dark region (possible cavity). The second loop brings up the rear. The second loop is the brighter of the two and I'm pretty sure this is what I saw in MK3. Approximate width of the CME is 43 degrees at 1.8 Rsun. (td) CHIP: Jet-like eruption from large AR in SW quadrant, 18:17-19:05 UT. Material appears to shoot straight out from the AR. (td) PICS: Two ribbon flare in progress from AR in SW quadrant at beginning of observing day (16:39 UT). Appears to last until 20:44 UT. At 18:10 UT, there is a small, bright flare followed by a jet-like eruption (also visible in CHIP). (td) 8/28/1999 1999d240 Mk3 data: 17:03 -> 22:13 MK3: CME visible from 18:05-18:41 UT. Very wide and fast, centered at PA 200 degrees at 1.9 Rsun with an approximate width of 80 degrees at 1.9 Rsun. CME quickly emerges from limb and spreads out to cover a wide range. (td) MK4: Very large, fast CME visible from 18:09-19:01 UT. Located near S. polar region, this event has a wide loop travelling southward from pole. Centered at PA 192, width is ~76 degrees at 1.9 Rsun. (td) PICS: Large two ribbon flare on east side of AR in SW quadrant. Flare travels along neutral line marked by the filament visible prior to the event. (td) LASCO: LASCO and EIT observed a partial halo CME on Saturday, 1999/08/28. The CME was associated with an X1.1 flare in AR 8674. The event was first visible in C2 at 18:26 UT as a bright structured front over the SW limb, with excess coronal brightness and outward motion visible over about 260 degrees in PA, from PA 20 (NE) to PA 280 (W). The projected speed of the leading edge in C3 was 400 km/s at PA 215 (SW). EIT observed the X flare beginning at about 18:00 UT, followed by evacuation of the corona over the SW limb. (Simon Plunkett, GSFC) 8/29/1999 1999d241 Mk3 data: 17:06 -> 22:16 No apparent coronal activity (td) MK4: No apparent coronal activity. (td) CHIP: No apparent eruptive acvtivity. (td) PICS: No apparent eruptive activity. (td) 8/30/1999 1999d242 Mk3 data: 16:38 -> 22:13 No apparent coronal activity (td) MK4: Faint CME centered at PA 4 degrees with an approximate width of 45 degrees at 1.8 Rsun, visible in MK4 from 18:11- 18:47 UT. Faint loop structure visible, no other features evident. (td) CHIP: Large filament eruption from large AR on North central meridian from 20:54-22:08 UT. A second filament eruption occurs from the AR just to the south. (td) PICS: Bright flare in AR on N-central meridian, 17:38-20:38 UT. There is a second flare just to the east of this AR visible from 20:51-21:30 UT. This flare is long and thin with a N-S orientation. (td) 8/31/1999 1999d243 No data taken at MLSO today. 9/01/1999 1999d244 No MK3 data. 9/02/1999 1999d245 Mk3 data: 16:59 -> 21:42 MK4: No apparent coronal activity. (td) PICS: Flare and filament eruption from AR in NW quadrant, 17:42-20:39 UT. Small disappearing filament near south pole, 17:29-18:40. Another small disappearing filament on south-central meridian, 17:29-18:09 UT. (td) CHIP: Flare from AR in NW quadrant visible from 17:42-20:39. Appears as a swelling in the AR. This is the same flare as the one mentioned in PICS above. (td) 9/03/1999 1999d246 Mk3 data: 16:49 -> 20:17 MK4: No apparent coronal activity. (td) PICS: Two ribbon flare in NW quadrant visible in disk data from 17:16-19:09 UT. (td) CHIP: Two ribbon flare visible in NW quadrant, 17:10-18:57 UT. 9/04/1999 1999d247 Mk3 data: 16:41 -> 20:40 MK4: CME visible in MK4 from 18:07-20:09 UT. Centered at PA 106 degrees with an approximate width of 30 degrees. There is a faint outer LOOP and CAVITY visible, but the striking feature is the bright prominence materialor CORE. It is very bright and easy to track in MK4 FOV. (td) PICS: Large, slow EPL at PA 90-110 degrees. In progress at the beginning of observing day and visible in PICS until 20:05 UT. Most of the material in this prominence appears to leave the limb. On the disk there is a flare from AR in NE quadrant, near limb. Small disappearing filament in SE quadrant, begins around 18:53 UT. (td) CHIP: Large EPL in progress at PA 90-110 degrees. It is gone by 20:10 UT. (td) 9/05/1999 1999d248 No MK3 data. 9/06/1999 1999d249 No data taken at MLSO today. 9/07/1999 1999d250 Mk3 data: 16:47 -> 22:14 MK4: Lots of clouds in the middle of the observing day, no apparent eruptive activity. (td) PICS: No apparent eruptive activity. (td) CHIP: EPL visible at PA 230-240, 20:20-21:40 UT. Most material seems to return to limb. (td) 9/08/1999 1999d251 Mk3 data: 16:51 -> 22:02 MK4: No apparent coronal activity. (td) PICS: Small filament eruption from small AR in NE quadrant, 21:55-22:07 UT. Material appears to be travelling westward. (td) CHIP: Small filament eruption from AR in NE quadrant, 21:21-22:07 UT. (td) 9/09/1999 1999d252 Mk3 data: 16:57 -> 22:25 MK4: CME visible in SW from 19:37-20:54 ut. Centered at PA 239 degrees, width is approximately 31 degrees at 2.8 Rsun. No LOOP or CAVITY visible, I have a feeling that most of what is visible in MK4 is the CORE, or prominence material. (td) PICS: Large APL on SW limb. Lots of material moves around but I don't thing anything leaves the limb. Small EPL at PA 235, 17:59-18:24 UT Partial filament eruption followed by a two-ribbon flare in NW quadrant from 17:40-20:09 UT. Part of a long E-W filament erupts, and a two ribbon flare can be seen immediately afterward. The remaining part of the filement (the westernmost part erupts), swirls longitudinally after the eruption. (td) CHIP: Large APL visible on SW limb. Filament eruption in NW quadrant followed by a two-ribbon flare visible from 17:33-20:09 UT. First, filament lifts off and then the flare can be seen. The nearby filament swirls with activity during and after the event. (td) 9/10/1999 1999d253 Mk3 data: 16:47 -> 22:04 MK4: Faint CME visible from 17:01-17:32 UT. Centered at PA 28 degrees, width is approximately 21 degrees at 2.0 Rsun. This appears to be primarily prominence material, no LOOP or CAVITY features visible. (td) PICS: Large active filament in NE quadrant but no apparent eruptive activity. (td) CHIP: No apparent eruptive activity. (td) 9/11/1999 1999d254 Mk3 data: 16:57 -> 22:30 MK4: No apparent coronal activity. (td) PICS: No apparent eruptive activity. (td) 9/12/1999 1999d255 Mk3 data: 16:43 -> 23:05 MK4: No apparent coronal activity. (td) PICS: No apparent eruptive activity. (td) CHIP: Possible (small) filament eruption on south side of AR in SE quadrant, 18:06-19:09 UT. Material seems to rise, spread out and most of it seems to return to surface. Small surge on limb at PA 75 degrees, 19:21-20:31 UT. (td) 9/13/1999 1999d256 Mk3 data: 17:01 -> 21:45 MK4: No apparent coronal activity. (td) PICS: AR on North-central meridian displays flaring activity throughout the day. Material can be seen slowing back and forth along nearby field lines. (td) CHIP: Active filament at the center of the disk early in the day. No other apparent eruptive activity. (td) 9/14/1999 1999d257 Mk3 data: 16:41 -> 22:05 MK4: CME visible in MK4 from 20:55-21:36 UT. Centered at PA 56 degrees with an approximate width of 30 degrees at 2.2 Rsun. Large expanding LOOP/CAVITY strucutre. No core visible. (td) PICS: No apparent eruptive activity. (td) CHIP: No apparent eruptive activity. (td) 9/15/1999 1999d258 Mk3 data: 17:16 -> 22:14 MK4: No apparent coronal activity. (td) PICS: Very large filament stretching across NE quadrant, I'll keep an eye on that. Difficult to see activity because pointing is bad througout the day. Possible filament eruption from small AR in SE quadrant, 19:15-20:00 UT. (td) CHIP: Possible filament eruption from AR in NE quadrant, near the limb, 19:30-2020 UT. Didn't really see anything lift off of surface, might be a surge. Very large active filament in NE quadrant, doesn't erupt. (td) 9/16/1999 1999d259 Mk3 data: 16:56 -> 22:15 MK4: CME in progress at start of observing day. Centered at PA 358 degrees and has an approximate width of 55 degrees at 2.3 Rsun. The CME is gone by 18:22 UT. There is a faint LOOP/CAVITY visible and the large core is easily visible but is diffuse, it has no bright boundary. (td) PICS: Limb Events : Large EPL in progress at start of observing day. It is high over the north pole by the time the first image is taken. It stretches from PA 340-360. Disk Events : Two ribbon flare from AR in NE quadrant appears at 18:13 UT. There seems to be an active filament associated with it just to the west of it. None of the material in the filament seems to lift off, just swirls back and forth. Another flare/filament eruption from AR in SW, 20:17-20:53 UT. Material seems to return to surface. A third eruption from AR in NW quadrant, 21:05-21:56 UT. (td) CHIP: Two ribbon flare visible in NE quadrant, seems to begin around 17:47 UT and seems associated with filament activity occurring in the AR just to the south of it. Material from the filament appears to lift up, swirl around and then return to the surface. (td) 9/17/1999 1999d260 Mk3 data: 16:43 -> 22:02 MK4: No apparent coronal activity. (td) PICS: Two small surges on limb at PA 60. The first one occurs at 17:59-18:31 UT. The second one is much larger and appears more like a jet of material streaming out. It occurs at 19:52-20:34 UT. Filament eruption near AR in NE quadrant, near equator. Visible from 18:42-19:45 UT. AR seems to flare just prior to filament eruption, material leaves the AR and travels along filament, disrupting it. (td) CHIP: The two surges mentioned in the PICS comment above are visible in CHIP as is the filament eruption. (td) 9/18/1999 1999d261 Mk3 data: 06:58 -> 22:01 MK4: No apparent coronal activity. (td) PICS: Interesting activity around a ring-shaped filament in NW quadrant, near limb. A small flare appears ~18:14 UT from which material leaves and then splits up. One section travels around the ring clockwise, and the other section of material travels CCW. Part of the ring filament may actually leave the surface. (td) CHIP: No apparent eruptive activity. (td) 9/19/1999 1999d262 Mk3 data: 17:02 -> 22:06 MK4: No apparent coronal activity. (td) PICS: No apparent eruptive activity. (td) CHIP: Filament in NE quadrant appears to lift off at about 19:03 UT. Material travels SW-ward. (td) 9/20/1999 1999d263 Mk3 data: 16:42 -> 22:05 MK4: No apparent coronal activity. (td) PICS: Disappearing filament in the NE quadrant. Very long, wispy filament, oriented NE to SW, slowly lifts off throughout the day. Material appears to travel SW-ward. (td) CHIP: No apparent eruptive activity. (td) 9/21/1999 1999d264 Mk3 data: 16:48 -> 21:23 MK4: No apparent coronal activity. (td) PICS: Lots of clouds throughout the day. No apparent eruptive activity. (td) CHIP: No apparent eruptive activity. (td) 9/22/1999 1999d265 Mk3 data: 17:00 -> 22:04 MK4: No apparent coronal activity. (td) PICS: Large EPL at PA 260 degrees but it doesn't appear to erupt. (td) CHIP: No apparent eruptive activity. (td) 9/23/1999 1999d266 Mk3 data: 17:02 -> 22:35 MK4: No apparent coronal activity. (td) PICS: Disappearing filament on S-central meridian, near the pole. Very thin line of material extending SE-ward from large AR in the SW lifts off beginning around 17:58 UT. (td) CHIP: No apparent eruptive activity. (td) 9/24/1999 1999d267 Mk3 data: 16:46 -> 22:03 MK4: No apparent coronal activity. (td) PICS: Tiny filament eruption near SE limb at 19:21 UT. Partial filament eruption in SW quadrant, near large AR in SW. Occurs at about 20:12 UT. (td) CHIP: Tiny filament eruption in NE quadrant, 20:22-20:40 UT. Material shoots SE-ward. (td) 9/25/1999 1999d268 Mk3 data: 17:03 -> 22:00 MK4: No apparent coronal activity. (td) PICS: Small active filament in SW quadrant. Filament seems very active until it finally disappears ~18:57 UT. Did not see any material lift off of surface. (td) CHIP: Filament eruption in SW quadrant, 18:09-19:19 UT. Large APL at PA 350 disappears by 20:32 UT. (td) 9/26/1999 1999d269 Mk3 data: 17:00 -> 20:47 MK4: No apparent coronal activity. (td) CHIP: Filament in SW quadrant may be lifting off toward the end of the day. The data end before I can tell for sure. AP at PA 115 degrees. (td) PICS: Filament in SW does appear to lift a bit toward end of day. (td) 9/27/1999 1999d270 Mk3 data: 16:43 -> 21:56 MK4: Small prominence eruption visible from 18:53-19:33 UT. Event is centered at PA 356 degrees and has an approximate width of 6 degrees at 1.1 Rsun. I couldn't see any LOOP or Cavity features with this eruption. (td) CHIP: Prominence eruption on NW limb at PA 300 degrees from 18:33-19:28. Tiny surge-like event from small AR in NW quadrant, 17:37-18:06 UT. (td) PICS: Disappearing filament near north-central meridian, gone by 19:31 UT. Surge from small AR in NW quadrant, 17:40-18:11 UT. (td) 9/28/1999 1999d271 Mk3 data: 16:42 -> 18:16 MK4: Short observation day due to work on instrument. No apparent eruptive activity. (td) CHIP: Short observing day due to work begin done on MK4. Instruments were stopped at 19:15 UT. No apparent eruptive activity. (td) PICS: Possible small two ribbon flare in AR in SW quadrant. Filament on s-central meridian may also lift off but the data end before I can tell for certain. (td) 9/29/1999 1999d272 Mk3 data: 19:51 -> 21:43 The MK3 instrument was decommisioned today. Last day of MK3 observations. (td) MK4: Another short day due to maintenence on MK4. No apparent coronal activity noted. (td) CHIP: Tiny eruption (and I hesitate to even call it that), from small AR near the NW limb, 18:43-19:16 UT. No other apparent eruptive activity. (td) PICS: Small flare in NW quadrant, near limb, 18:42-19:13 UT. Another flare in SE quadrant, followed by a jet of material from 20:07-20:40 UT. (td) 9/30/1999 1999d273 Mk3 data: 16:53 -> 21:00 MK4: No activity noted. Lots of adjustments on the MK4 instrument made observing activity difficult. (td) CHIP: There is a data gap in CHIP data from 17:45-20:24 UT while the observers were working on MK4 instrument. Large filament stretching across north pole disappears sometime during the data gap. It is gone by 20:24 UT. (td) PICS: Large polar crown filament has changed appearance by the end of the day, but it has not disappeared as it seemed to in the CHIP data. There was a data gap from 17:47-20:24 UT. (td) 10/01/1999 1999d274 Mk4 data: 16:41 -> 23:18 MK4: No apparent coronal activity. (td) CHIP: Very faint filament eruption in SE quadrant, near equator, 17:57-18:39. Event occurs just south of the large AR in the NE quadrant. and is really visible only in fast animations. (td) PICS: Small flare on the N meridian, just below a small E-W oriented filament. The eruption is followed by a small, thin, E-W spreading of material along a field line (this is not a two ribbon flare). Event occurs from 16:44-17:08 UT. (td) 10/02/1999 1999d275 Mk4 data: 17:00 -> 20:50 MK4: CME visible from 17:50-19:58 UT. Centered at PA 123 degrees, width is approximately 20 degrees at 1.5 Rsun. Prominence material is the dominent feature. There is a data gap from 17:50-19:06 UT so the formation of the CME isn't evident, can't really tell if there was anything other than prominence material visible. (td) CHIP: Large EPL at PA 125 degrees, 17:48-19:3y UT. As the prominence travels outward, there appears to be a corresponding structure motion on the disk, just off of the limb. Velocity data suggest that prominence material is travelling toward the observer along the disk, channeled through magenetic field lines. (td) PICS: Limb Events : Large EPL at PA 125 degrees starts to lift off at 18:26 UT and remains visible until ~19:54 UT. Disk Events : Filament eruption corresponding to EPL mentioned above. Possible wave motion as well, travelling northward. (td) 10/03/1999 1999d276 Mk4 data: 17:04 -> 21:56 MK4: No apparent coronal activity. (td) CHIP: No apparent eruptive activity. (td) PICS: Small two ribbon flare on the S meridian, 17:25-18:35 UT. (td) 10/04/1999 1999d277 Mk4 data: 16:53 -> 23:36 MK4: No apparent coronal activity. (td) PICS: Flare from AR in NE quadrant, near limb, 21:08-22:02 UT. This AR shows activity throughout the day. (td) CHIP: Noticable wave-like motion visible in NE quadrant, near limb. Beginning around 2:12 UT and lasting until the end of the day, the motion is centered on a small filament near limb. The motion is roughly circular and a small filament can be seen leaving the surface just prior to the event. (td) 10/05/1999 1999d278 Mk4 data: 16:43 -> 22:30 MK4: No apparent coronal activity. (td) PICS: Tiny two ribbon flare from AR in NE quadrant, 18:56-19:51 UT. Another tiny flare in NW, 18:44-19:06 UT. (td) CHIP: Small flare in NW quadrant, 18:10-18:57 UT. (td) 10/06/1999 1999d279 No MK4 data. 10/07/1999 1999d280 No MK4 data. 10/08/1999 1999d281 Mk4 data: 17:00 -> 19:45 MK4: No apparent coronal activity. (td) PICS: Pointing errors caused by clouds made locating features on disk very difficult. No disk activity noted. CHIP: EPL at PA 35 in progress, gone by 18:07 UT. Filament on equator, near west limb may be starting to lift off around 20:19 UT but the data end before I could tell for certain. (td) 10/09/1999 1999d282 Mk4 data: 16:46 -> 22:17 MK4: No apparent coronal activity. (td) CHIP: No apparent eruptive activity. (td) PICS: No apparent eruptive activity. (td) 10/10/1999 1999d283 Mk4 data: 16:57 -> 22:09 MK4: Exceedingly faint motion (I hesitate to call this a CME) centered at PA 207 degrees, with an approximate width of 23 degrees at 1.5 Rsun. Visible from 17:27-19:38 UT. Couldn't really make out any details. (td) CHIP: Active filament in the SW quadrant, no apparent eruptive activity. (td) PICS: Data quality poor due to clouds. Active filament visible in SW, no apparent eruptive activity. (td) 10/11/1999 1999d284 Mk4 data: 16:50 -> 21:03 MK4: No apparent coronal activity. (td) CHIP: Possible filament eruption, or flare, from 17:24-18:12 UT in NW quadrant. Ejection appears as a 'fountain' of material coming from small localized region in NW quadrant. Difficult to tell if material leaves the surface. Another possible flare in NE quadrant, near equator from 20:28 UT until the end of the day. May be the beginning of a two ribbon flare. (td) PICS: Filament eruption in NW quadrant, mentioned in CHIP logs is visible, 17:23-18:15 UT. (td) 10/12/1999 1999d285 Mk4 data: 16:51 -> 22:11 MK4: No apparent coronal activity. (td) CHIP: Possible filament eruption in NW quadrant, 17:49-19:13 UT. AR just to the east appears to flare simultaneously. Faint filament eruption in the SW, 20:31-21:28 UT. (td) PICS: EPL at PA 295 degrees, 19:14-19:50 UT. (td) 10/13/1999 1999d286 Mk4 data: 16:59 -> 22:12 MK4: No apparent coronal activity. (td) CHIP: Surge from AR in NE quadrant, 17:19-18:22 UT. (td) PICS: Surge visible from AR in NE quadrant, 17:30-18:10 UT. (td) 10/14/1999 1999d287 Mk4 data: 16:39 -> 22:05 MK4: No apparent coronal activity. (td) PICS: Large flare from AR in NE quadrant, 17:31-21:23 UT. Entire AR seems to be affected. Structure motion is visible travelling southward from the AR. (td) CHIP: Huge flare visible from large AR in NE quadrant, 18:32-20:41 UT. Structure motion can be seen travelling southward from the AR. (td) 10/15/1999 1999d288 Mk4 data: 17:09 -> 22:09 MK4: No apparent coronal activty. (td) PICS: Flares are visible in the very large AR on the center of the sun's disk. The two most notable are: 17:32-18:18 UT, the eruption seems to follow small filament overhead. 18:27-19:20, material appears to jet out from eruption southward. There are several more, smaller flares occuring throughout the day. (td) CHIP: Small Jet of material coming from AR on central meridian, 18:31-19:30 UT. Appears to correspond to second eruption mentioned in PICS logs. (td) 10/16/1999 1999d289 Mk4 data: 16:56 -> 19:41 Data quality poor due to clouds in Hawaii. MK4: No apparent coronal activity (td) PICS: No apparent eruptive activity. (td) CHIP: No apparent eruptice activity. (td) 10/17/1999 1999d290 Mk4 data: 16:59 -> 21:18 MK4: No apparent coronal activity. (td) CHIP: No apparent eruptive activity. (td) PICS: No apparent eruptive activity. (td) 10/18/1999 1999d291 Mk4 data: 16:57 -> 22:06 MK4: No apparent coronal activity. (td) CHIP: No apparent eruptive activity. (td) PICS: No apparent eruptive activity. (td) 10/19/1999 1999d292 Mk4 data: 16:48 -> 20:55 MK4: No apparent coronal activity. (td) CHIP: No apparent eruptive activity. (td) PICS: Flare in AR in NW quadrant, 19:22-20:19 UT. (td) 10/20/1999 1999d293 No MK4 data. 10/21/1999 1999d294 No MK4 data. 10/22/1999 1999d295 Mk4 data: 16:50 -> 19:32 Mk4 observations unusable. (clouds). CHIP: Data quality poor today due to clouds. No apparent eruptive activity. (td) PICS: Tiny filament eruption from AR in SW quadrant, 16:53-18:03 UT. (td) 10/23/1999 1999d296 Mk4 data: 16:53 -> 22:02 MK4: No apparent coronal activity. (td) CHIP: No apparent eruptive activty. PICS: Possible two ribbon flare from small AR in SE quadrant, nearest the limb, 17:44-19:39 UT. AR on NW limb is very active throughout the day, there are a few surges coming from it as the day progresses. (td) 10/24/1999 1999d297 Mk4 data: 16:55 -> 22:03 MK4: No apparent coronal activity. (td) CHIP: No apparent eruptive activity. (td) 10/25/1999 1999d298 Mk4 data: 16:55 -> 22:03 MK4: Narrow CME centered at PA 174 degrees, with an approximate width of 17 degrees visible from 19:27-20:06 UT. There is a three part structure (LOOP/CAV/CORE) visible in the CME. (td) CHIP: Enormous two ribbon flare visible in the SW quadrant in progress and is visble throughout the day. There is also a smaller filament eruption just to the south of the flare from 18:20-19:27. Filament material can be seen very briefly. (td) PICS: EPL at PA 250 degrees , 19:22-20:19 UT. Most of the material appears to return to the limb. Huge two ribbon flare visible in Sw quadrant throughout the day. Flare in AR in SE quadrant, 18:42-19:30 UT. Filament eruption from AR near west limb, 18:06-20:00 UT. Corresponds to event seen on limb. (td) 10/26/1999 1999d299 Mk4 data: 16:57 -> 23:37 MK4: Large CME centered at PA 191, visible from 21:15-22:25 UT. Width is approximately 34 degrees at 1.9 Rsun. Appears to be a fast moving event with a three part structure. There appears to be a double outer loop in this event. (td) CHIP: Filament eruption from AR in NE quadrant, 2047-21:38 UT. Possible EPL at PA 90, 18:20-19:29 UT. Possible EPL at PA 310, 19:47-22:11 UT. (td) PICS: Large EPL at PA 90 degrees, 18:56-19:50 UT, not much material leaves the surface. EPL at PA 260 Degrees, 21:11-21:23 UT. EPL at PA 310, 19:38-22:20 UT. Possible 2-ribbon flare on west limb, 21:04-22:07 UT. AR in SW quadrant flares, 18:19-19:22 UT. Filament eruption from AR in NE quadrant, 20:49-21:46 UT. (td) 10/27/1999 1999d300 Mk4 data: 16:50 -> 22:05 MK4: Narrow structure motion in progress (possible candidate of the ray-like CME category). It remains visible until 19:45 UT. Centered at PA 162 and has a width of approximately 10 degrees. (td) CHIP: No apparent eruptive activity. (td) PICS: Filament eruption from AR in SW quadrant, 17:57-18:37 UT. Flare in SW 18:31-19:49 UT. This flare also contains a filament eruption. (td) 10/28/1999 1999d301 Mk4 data: 16:59 -> 20:42 MK4: No coronal activity visible today due to clouds. (td) CHIP: No apparent eruptive activity. (td) PICS: Small filament eruption from AR in NE quadrant, near meridian 19:12-20:15 UT. (td) 10/29/1999 1999d302 Mk4 data: 18:06 -> 21:23 MK$: No apparent coronal activity. (td) CHIP: Lots of clouds today, data quality poor. No apparent eruptive activity. (td) PICS: Data quality poor due to clouds. No apparent eruptive activity. (td) 10/30/1999 1999d303 No MK4 data. CHIP: Data quality poor due to clouds over MLSO. No apparent eruptive activity. (td) PICS: No apparent eruptive activity. (td) 10/31/1999 1999d304 No MK4 data. 11/01/1999 1999d305 Mk4 data: 17:08 -> 22:08 MK4: Data quality poor due to clouds. No coronal activity visible. (td)_ PICS: Data quality poor due to clouds. No apparent eruptive activity. (td) CHIP: No apparent eruptive activity. (td) 11/02/1999 1999d306 Mk4 data: 16:59 -> 21:22 MK4: No apparent coronal activity. (td) PICS: Small flare from AR in SW quadrant, 18:29-19:20 UT. (td) CHIP: No apparent eruptive activity. (td) 11/03/1999 1999d307 No observations; cloudy. 11/04/1999 1999d308 No observations; cloudy. 11/05/1999 1999d309 Mk4 data: 18:14 -> 18:17 CHIP: Poor weather at MLSO. No usable images today. No activity noted. (td) PICS: No activity visible in PICS instrument. (td) 11/06/1999 1999d310 No observations; cloudy. 11/07/1999 1999d311 Mk4 data: 16:59 -> 22:04 Mk4 observations unusable. MK4: Data quality poor due to clouds. No apparent eruptive activity. (td) CHIP: Active filament in SW. No apparent eruptive activity. (td) PICS: Large active filament in SW quadrant may be lifting off toward the end of the day. Material becomes noticably diffuse and widespread by the time the observing day ends. I don't see any material leaving the disk. (td) 11/08/1999 1999d312 No MK4 data. No PSPT data. Cirrus clouds. CHIP: Lots of clouds today. Data quality poor. Flare from AR in NE quadrant, 20:32-22:09 UT. Material appears to travel along filament arching over the NW corner of AR. (td) PICS: No apparent eruptive activity. (td) 11/09/1999 1999d313 Mk4 data: 16:55 -> 19:15 useful Mk4 data: 17:22 - 17:42 MK4: No apparent coronal activity. (td) CHIP: Lots of clouds today. Data quality poor. Wave motion visible in NW quadrant. It appears to be centered at a common radius and appears to start around 17:29 UT. In order to see it, need to look at it with a fast animation frame rate. Doesn't seem associated with any nearby features but may be part of filament in NW. (td) PICS: Two ribbon flare from AR in NE quadrant, near limb, 19:38-21:35 Ut. More flare activity from AR just to the west of this AR, 18:59-19:41 UT. (td) 11/10/1999 1999d314 No observations. 11/11/1999 1999d315 No observations. 11/12/1999 1999d316 Mk4 data: 17:06 -> 23:35 MK4: No apparent coronal activity. (td) PICS: Flare in progress in SW quadrant, gone by 19:04 UT. Flare in NW quadrant near small filament, 17:27-18:28 UT. Material appears to travel along filament. (td) CHIP: No apparent eruptive activity. (td) 11/13/1999 1999d317 Mk4 data: 17:06 -> 21:34 useful Mk4 data: 21:02 -> 21:34 MK4: No apparent coronal activity. (td) PICS: Small flares coming from large AR in NW quadrant throughout the day. Disappearing filament in NE quadrant, seems to begin ~18:00 UT and lasts throughout the day. Another disappearing filament in NW quadrant, near the limb. Hard to get a start time, ~ 18:16 UT. Flare/Filament eruption from large AR near central meridian, 19:28-20:31 UT. (td) CHIP: No apparent eruptive activity. (td) 11/14/1999 1999d318 Mk4 data: 17:05 -> 22:29 MK4: No apparent coronal activity. (td) PICS: Huge disappearing filament in NE quadrant, 18:22-20:52 UT. Seems to spark a flare from AR in NE quadrant, 21:46-end of day (they may not be related). The flare seems to have a bright wave travelling SW-ward immediately afterward. Another flare in AR in SE quadrant 20:49 - end of day. Flare and filament eruption from AR in SE quadrant, 19:43-20:37 UT. (td) CHIP: Beautiful filament erupption in NE quadrant, 17:48-21:03 UT. Most of the material appears to loop back toward the surface. Flare and filament eruptiion visible, 19:55-21:03 UT. (td) 11/15/1999 1999d319 Mk4 data: 18:42 -> 23:37 Mercury transit MK4: No apparent coronal activity. (td) PICS: Mercury transit today. Flare in AR in SE quadrant, 22:28-end of day. (td) CHIP: Small flare/filament eruption visible in SE, 21:05-21:53 UT. Eruption is embedded in Large AR in SE. (td) 11/16/1999 1999d320 Mk4 data: 18:40 -> 22:06 MK4: No apparent coronal activity. (td) CHIP: Filament eruption in SW quadrant, 21:14- end of observing day. Possible 2 ribbon flare in NE quadrant, below AR in that quadrant. (td) PICS: Couldn't make out any eruptive activity today, pointing was bad. (td) 11/17/1999 1999d321 No Mk4 data. Darryl on vacation. 11/18/1999 1999d322 Mk4 data: 17:00 -> 22:16 MK4: No apparent coronal activity. (td) CHIP: Filament eruption from AR in SW quadrant, 20:55-21:57 UT. Most of the material appears to return to the disk. There also appears to be a small wave emmanating from the AR just after the eruption. Need fast animation frame rate to see it though. (td) PICS: Flare and filament eruption in SW quadrant, 18:44-19:20 UT. Material can be seen jetting out toward the SW limb in a narrow column. Another flare in SW quadrant, 18:53-19:23 UT. Very bright. Flare in AR in NE quadrant, 21:59 UT - end of observing day. (td) 11/19/1999 1999d323 MK4 data: 17:02 -> 22:05 Prominence eruption at south pole. MK4: Very bright prominence visible in MK4 from 1723-1944 UT. I do not see a CME associated with this eruption but a cavity does form around 17:59 at 1.74 Rsun. The cavity surrounds the filament material. The filament stretches radially outward as it progresses higher. Centered at PA 200 degrees and has an approximate width of 10 degrees at 1.7 Rsun. (td) CHIP: Two large 2 ribbon flares occurred early in the day today. The first one is associated with a filament in the SE quadrant. At 17:15 the filament erupts, followed by the two ribbon flare. The second flare is much larger and is associated with at large prominence eruption on the limb (EPL) at 17:21 UT. Following the EPL, one half of the two ribbon flare is visible and appears to be travelling toward the observer from other side of the limb. The structure motion associated with the flare extends over 60 degrees on the limb. (td) PICS: Bright two ribbon flare in SE quadrant, 17:05-20:15 UT. Flare/filament eruption fro AR in SE quadrant, 19:03-20:09 UT. Do not see the large two ribbon flare on SW limb that I saw in CHIP. (td) 11/20/1999 1999d324 No Mk4 data. Darryl on vacation. 11/21/1999 1999d325 No Mk4 data. Darryl on vacation. 11/22/1999 1999d326 No MK4 data. Cirrus clouds. CHIP: No apparent eruptive activity. Data quality poor due to clouds. (td) PICS: Small flare in NE quadrant, 18:12-19:00 UT. Another small flare in SE quadrant, 19:36-20:15 UT. (td) 11/23/1999 1999d327 No Mk4 data. Cirrus clouds. CHIP: Data quality poor due to bad weather at MLSO. No apparent eruptive activity. (td) PICS: No apparent eruptive activity. (td) 11/24/1999 1999d328 No Mk4 data. Darryl on vacation. 11/25/1999 1999d329 Mk4 data: 17:04 -> 22:06 MK4: No apparent coronal activity. (td) CHIP: Flare from AR in SW quadrant, 17:39-19:42 UT. Material from a possible filament eruption seems to preceed it. (td) PICS: Large flare in AR near west limb, 19:00-20:09 UT. Small flare in AR near south meridian, 20:36-21:24 UT. Material seems to eject in a narrow stream. (td) 11/26/1999 1999d330 Mk4 data: 17:10 -> 19:22 MK4: Data quality poor due to clouds at MLSO. No aparent coronal activity. (td) CHIP: Very large 2 ribbon flare in progress at start of observing day at MLSO. Located in the SW quadrant, the event seems to span approximately 20 degrees of latitude. The filament located near the south pole lifts off toward the end of the event. (td) PICS: Two ribbon flare and filament eruption on s-central meridian, 17:44-18:57 UT. Large filament eruption near south pole lifts off 17:17-19:30 UT. (td) 11/27/1999 1999d331 No Mk4 data. Darryl on vacation. 11/28/1999 1999d332 No Mk4 data. Darryl on vacation. 11/29/1999 1999d333 Mk4 data: 17:17 -> 22:02 MK4: No apparent coronal activity. (td) CHIP: Possible filament eruption in SW quadrant toward the end of the observing day. Begins ~21:35 UT and is still going by the time the data end. Disappearing filament in SE quadrant, near central meridian, gone by 18:54 UT. (td) PICS: Partial disappearing filament in SE quadrant, near meridian. Gone by 18:42 UT. This is the same filament mentioned above. (td) 11/30/1999 1999d334 Mk4 data: 17:10 -> 18:37 MK4: Short day due to clouds. No apparent eruptive activity. (td) PICS: Two ribbon flare in NE quadrant, 17:44-19:40 UT. (td) CHIP: Two ribbon flare in NE quadrant, 17:50-19:18 UT. (td) 12/01/1999 1999d335 No Mk4 data taken at MLSO today. 12/02/1999 1999d336 No Mk4 data taken at MLSO today. 12/03/1999 1999d337 No MK4 data. 12/04/1999 1999d338 No MK4 data. 12/05/1999 1999d339 No MK4 data. 12/06/1999 1999d340 Mk4 data: 19:29 -> 21:56 MK4: Late start due to clouds at MLSO. No apparent coronal activity. (td) PICS: Short day due to bad weather. No apparent eruptive activity. (td) CHIP: No apparent eruptive activity. (td) 12/07/1999 1999d341 Mk4 data: 18:38 -> 22:11 MK4: Faint CME centered at PA 119 degrees and visible from 21:05-22:02 UT. Approximate width is 16 degrees at 1.8 Rsun. (td) PICS: Small flare near east limb, 21:08-21:44 UT. (td) 12/08/1999 1999d342 Mk4 data: 17:36 -> 23:04 MK4: Data quality poor due to cloudy weather at MLSO. No apparent coronal activity. (td) PICS: No apparent eruptive activity. (td) CHIP: Possible filament eruption late in the day (~21:27 UT) but I cant' tell for certain. (td) 12/09/1999 1999d343 Mk4 data: 19:41 -> 21:10 MK4: Data quality poor due to clouds at MLSO. No apparent coronal activity. (td) PICS: Flare/filament eruption in SE quadrant, 20:09-20:48 UT. (td) CHIP: Filament eruption from AR in SE quadrant, 20:10-20:40 UT. (td) 12/12/1999 1999d346 No MK4 data. 12/13/1999 1999d347 Mk4 data: 17:21 -> 20:49 MK4: Faint CME in progress at start of observing day and is visible in MK4 until 18:28 UT. Centered at PA 171 degrees and has a width of approximately 23 degrees at 1.5 Rsun. (td) PICS: No apparent eruptive activity. (td) CHIP: Faint, large two ribbon flare visible in the SE quadrant throughout the day. No sign of any associated filament eruption. (td) 12/14/1999 1999d348 Mk4 data: 17:24 -> 21:16 MK4: Very faint CME centered at PA 76 degrees, visible in mk4 from 19:48-20:06 UT. Approximate width is 30 degrees at 1.5 Rsun. I could make out a faint outer loop but no cavity or core feature. (td) CHIP: No apparent eruptive activity. (td) PICS: Disappearing filament in south, near meridian, gone by 18:03 UT. (td) 12/15/1999 1999d349 Mk4 data: 17:17 -> 22:44 MK4: EPL visible in MK4 data, 19:29-20:23 UT. No outer loop or cavity features visible. Prominence is centered at PA 124 degrees at 1.5 Rsun. (td) CHIP: EPL/two ribbon flare visible on SE limb, PA 120-130 degrees, 19:24-22:17 UT. Prominence looks like it comes from the far side of the limb. EPL @ PA 155, 19:09-20:26 UT. (td) PICS: EPL at PA 120-130 degrees, 19:27-20:04 UT. Seems to travel along filament channel. Flare associated with EPL, 19:27-20:04 UT visible. Flare and filament eruption in NW quadrant, 18:20-19:11 UT. Flare from AR in SW quadrant, 19:10-21:08 UT, seems to travel along filament channel. (td) 12/16/1999 1999d350 Mk4 data: 17:33 -> 22:43 MK4: Faint CME centered at PA 73 degrees visible from 20:15-20:52 UT. Width is approx. 28 degrees at 1.7 Rsun. Faint loop and cavity visible followed by a slow prominence material (prominence material is very faint). Loop appears to be travelling quite fast. (td) CHIP: Possible EPL at PA 60, 19:15-22:11 UT. Hard to see how much material left the limb. (td) PICS: Limb Events : EPL @ PA 65 degrees, 19:15-22:11 UT. Disk Events : Part of the EPL seen in LIMB data is visible. No other eruptive activity seen. (td) 12/17/1999 1999d351 Mk4 data: 17:23 -> 22:32 MK4: No apparent coronal activity. (td) CHIP: No apparent eruptive activity. (td) PICS: Flare from AR in SE quadrant, 18:42-19:30 UT. Anther flare/filament eruption on NE limb, PA 80 Degrees, 21:36-22:30 UT. (td) 12/18/1999 1999d352 Mk4 data: 17:36 -> 22:44 MK4: No apparent coronal activity. (td) CHIP: No apparent eruptive activity. (td) PICS: Two flares, both near the east limb. One is in the NE quadrant, near limb, 17:58-20:06 UT. The second is in the SE quadrant, 21:36-22:45 UT. (td) 12/19/1999 1999d353 Mk4 data: 17:39 -> 21:47 MK4: No apparent coronal activity. (td) CHIP: Filament eruption in AR near south central meridian, 20:34-21:10 UT. (td) PICS: Small flare near west limb, 19:23-19:53 UT. Flare/filament eruption near central meridian in the south, 20:26-21:20 UT. (td) 12/20/1999 1999d354 No Mk4 data taken at MLSO today. 12/21/1999 1999d355 Mk4 data: 17:32 -> 22:05 MK4: No apparent coronal activity. (td) CHIP: Large 'jet-like' eruption from AR in NE quadrant in progess at start of MLSO observing day. Visible in only the first few frames of the day before clouds set in. Another, similar eruption occurs in the same place, 18:48-19:39 UT but this one is not as large. (td) PICS: Limb Events : 'Jet-like' eruption visible in first few images of the day at PA 50 degrees. Disk Events : Jet-like eruption from AR in NE quadrant in progress and visible in first few images of the day. Another similar eruption from the same AR occurs 18:54-19:27 UT. (td) 12/22/1999 1999d356 Mk4 data: 17:38 -> 17:41 MK4: No usable data today due to cloud cover at MLSO. CHIP: 'Jet-like' eruption from AR in NE quadrant, 19:00-19:45 UT. Very similar to the one which occurred in the same AR yesterday. It occurred during a period of partial cloud cover so it doesn't show up in the daily movie (those images weren't included). (td) PICS: 'Jet-like' eruption similar to the one which occurred yesterday from 18:51-19:48 UT. Originates from the same AR in the NE quadrant as the one yesterday as well. (td) 12/23/1999 1999d357 Mk4 data: 17:43 -> 22:28 MK4: No apparent coronal activity. (td) CHIP: Another 'jet-like' eruption from the same active region as the previous two day, they are also occuring at about the same time (must be a solar geyser), 19:47-20:20 UT. This eruption is smaller than the previous two eruptions. (td) PICS: Smaller 'jet-like' eruption from same AR as previous two days, 19:30-20:15 UT. (See CHIP notes). AR is near north central meridian. (td) 12/24/1999 1999d358 No Mk4 data taken at MLSO today. 12/25/1999 1999d359 No Mk4 data taken at MLSO today. 12/26/1999 1999d360 Mk4 data: 17:38 -> 22:05 MK4: No apparent coronal activity. (td) PICS: Flare from AR in SW quadrant, 19:27-20:09 UT. (td) CHIP: No apparent eruptive activity. (td) 12/27/1999 1999d361 Mk4 data: 17:33 -> 22:49 MK4: EPL mentioned in PICS notes is visible in only a few images due to clouds at the time of the event. Because there is only a few images with which to view the event, I could not make out any outer loop. There may be a definable cavity however. The core is very bright and is centered at PA 38 degrees and has an approximate width of 11 degrees. (td) PICS: Limb Events : Huge EPL at spanning over 20 degrees on NE limb, 40-60 degrees. Prominence starts moving slowly at first (already in progress at beginning of observing day) and lasts until the end of the day. The prominence appears to begin accelerating quickly around 20:22 UT. Disk Events : Disk images reveal that the EPL occurs behind the east limb. Prominance material appears to travel northward as if leaves the limb. Some bright material (at least it's bright in halpha) appears to travel back downward toward the disk. (td) CHIP: Large EPL visible on NE limb between 40 - 60 degrees. Moves slowly away from limb until about 20:22 UT and then really accelerates. Two ribbon flare on south central meridian, 19:25-22:25 UT. (td) 12/28/1999 1999d362 Mk4 data: 17:27 -> 22:09 MK4: No apparent coronal activity. (td) PICS: Short day due to problems with the occulter assembly. No apparent eruptive activity. (td) CHIP: No apparent eruptive activity. (td) 12/29/1999 1999d363 Mk4 data: 17:32 -> 22:55 MK4: Thin (possibly ray-like) CME centered at PA 311 degrees, width ~11 degrees. Visible from 21:45-22:43 UT. PICS: EPL at PA 305 degrees, 21:49-22:49 UT. Very thin eruption with most material appearing to return to surface. Disk data reveal that the EPL is on earthward side of west limb. (td) CHIP: EPL visible at PA 310 degrees, 21:48-22:48 UT. (td) 12/30/1999 1999d364 Mk4 data: 17:45 -> 23:01 MK4: No apparent coronal activity. (td) PICS: Data quality poor due to problems at MLSO with the occulter assembly. No apparent eruptive activity. CHIP: Filament eruption, followed by a two ribbon flare in NE quadrant, near limb. Event begins ~20:41 UT. (td)