----------------------------------------------------------------------------- Mauna Loa Solar Observatory Observer's Log ----------------------------------------------------------------------------- Fri May 01 16:26:57 GMT 2026 Year:26 Doy:121 Observer: Weather COMMENT BY mcotter: Fri May 01 16:30:17 GMT 2026 MLO Current Weather Timestamp (UTC): 2026-05-01 16:23:00 Temperature : 36.54 deg F Dew Point : 9.01 deg F Pressure : 678.26 mbar Wind Speed : 4.92 mph Wind Direction : 141.7 deg Skies: Dense fog and heavy rain in the Saddle Valley up to approximately 10,000'. Inversion layer visible on the horizon up to approximately 10,000' with bright skies on the horizon and seemingly clear skies overhead. ___end___ GENERAL COMMENT BY mcotter: Fri May 01 16:43:32 GMT 2026 Comment: Arrived onsite at approximately 0625 HST. ___end___ GENERAL COMMENT BY mcotter: Fri May 01 16:44:10 GMT 2026 Opened windows upstairs ___end___ GENERAL COMMENT BY mcotter: Fri May 01 16:44:17 GMT 2026 Dome open ___end___ ** KCOR PM mcotter ** : Fri May 01 16:44:28 GMT 2026 Blew off Kcor O1 ___end___ BY mcotter: Fri May 01 16:48:37 GMT 2026 Power Supply Levels. Upon arrival power levels were as follows: ECO FLO: 49%. YETI: 35%. ___end___ KCOR BY mcotter: Fri May 01 16:49:44 GMT 2026 Kcor computer and instrument are energized. ___end___ Fri May 01 17:04:14 GMT 2026 Kcor Focus/alignment program exited KCOR COMMENT BY mcotter: Fri May 01 17:07:27 GMT 2026 Kcor Started: The Kcor Instrument is now observing. ___end___ Solar Event COMMENT BY mcotter: Fri May 01 18:50:14 GMT 2026 Observed Prominence: There is a bright prominence at approximate PA 80 Deg. , which I have been monitoring since the data started coming in at approximately 17:06 UT. Several automated CME reports were sent out regarding this prominence, but in my opinion it is NOT a CME, but a prominence. After the first automated CME report was issued I sent out an email to the MLSO team advising that the anomaly observed is not a CME but a prominence and I requested further instructions on how to respond when a false automated alert is sent out. ___end___ Weather COMMENT BY mcotter: Fri May 01 18:51:32 GMT 2026 MLO Current Weather Timestamp (UTC): 2026-05-01 18:47:00 Temperature : 48.11 deg F Dew Point : 21.27 deg F Pressure : 679.35 mbar Wind Speed : 8.05 mph Wind Direction : 70.7 deg Skies: Skies remain clear, but aerosols are increasing. ___end___ GENERAL COMMENT BY mcotter: Fri May 01 18:58:23 GMT 2026 Power Supply Levels: ECO FLO: Input: 800 W. Output: 750 W. Battery: 15% YETI: Input: 233 W Output: 54 W Battery: 36% ___end___ Fri May 01 20:01:02 GMT 2026 KCOR Start Calibration script: c:\kcor\mlso-calibration22deg-20171025.ini Fri May 01 20:16:16 GMT 2026 KCOR End Calibration Script Weather COMMENT BY mcotter: Fri May 01 20:19:12 GMT 2026 MLO Current Weather Timestamp (UTC): 2026-05-01 20:14:00 Temperature : 51.31 deg F Dew Point : 9.81 deg F Pressure : 679.56 mbar Wind Speed : 8.72 mph Wind Direction : 51.2 deg Skies: The skies have cleared a bit and the Synoptic images have gotten darker, indicating that the sky has lost some of it's brightness. ___end___ KCOR COMMENT BY mcotter: Fri May 01 20:23:05 GMT 2026 Aerosols are still prevalent in the NRGF images, but the images are looking good as the Sun rises in the sky and the sky looses some of it's brightness. ___end___ CME Retraction COMMENT BY mcotter: Fri May 01 20:53:12 GMT 2026 CME Retraction. An automated CME alert was sent out for an anomaly observed at 2023-05-01 17:24:22 UT. After further observations, this anomaly IS NOT A CME. The anomaly observed has been identified as an Observed Solar Prominence. ___end___ Weather COMMENT BY mcotter: Fri May 01 21:05:01 GMT 2026 MLO Current Weather Timestamp (UTC): 2026-05-01 20:59:00 Temperature : 52.23 deg F Dew Point : 15.73 deg F Pressure : 679.42 mbar Wind Speed : 10.74 mph Wind Direction : 30.7 deg Skies: Skies continue to be clear in the immediate area around the observatory and in the viewing area, but Orographic clouds are now starting to appear to the East and West with additional clouds still present in the Saddle Valley. There has been a large increase in the aerosols visible in the NRGF images. ___end___ GENERAL COMMENT BY mcotter: Fri May 01 21:36:04 GMT 2026 Closed Dome Lower Shutter Door. Closed Dome Windows. The wind is picking up a little bit, so I closed the Dome Lower Shutter Door and closed the Dome windows. ___end___ Weather COMMENT BY mcotter: Fri May 01 22:15:03 GMT 2026 MLO Current Weather Timestamp (UTC): 2026-05-01 22:08:00 Temperature : 53.26 deg F Dew Point : 15.03 deg F Pressure : 679.07 mbar Wind Speed : 12.3 mph Wind Direction : 59.6 deg Skies: The skies remain clear at this time over the observatory and the in the viewing area, but Orographic clouds continue to build on in the sky in all directions. The wind continues to increase quite a bit. ___end___ Solar Event COMMENT BY mcotter: Fri May 01 23:06:47 GMT 2026 Observed Filament. Filament can be observed at approximate PA 33.5 Deg. ___end___ KCOR COMMENT BY KCOR: Fri May 01 23:15:53 GMT 2026 KCOR file transfer report KCor created 1465 .bin files 1465 .fts files Remote site is complete ? no rsync required. ___end___ BY mcotter: Fri May 01 23:24:34 GMT 2026 End Of Day. Good day of observations. ___end___ Logger COMMENT BY mcotter: Fri May 01 23:24:45 GMT 2026 Log closed ONSITE STAFF: mcotter ___end___