:Product: 0528SGAS.txt :Issued: 2021 May 28 0245 UTC # Prepared jointly by the U.S. Dept. of Commerce, NOAA, # Space Weather Prediction Center and the U.S. Air Force. # Joint USAF/NOAA Solar and Geophysical Activity Summary SGAS Number 148 Issued at 0245Z on 28 May 2021 This report is compiled from data received at SWO on 27 May A. Energetic Events Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 0355 0356 0356 140 B. Proton Events: None. C. Geomagnetic Activity Summary: The geomagnetic field was quiet to active. D. Stratwarm: Not Available E. Daily Indices: (real-time preliminary/estimated values) 10 cm 083 SSN 034 Afr/Ap 015/014 X-ray Background B2.4 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 8.5e+04 GT 10 MeV 4.5e+04 p/(cm2-ster-day) (GOES-16 satellite synchronous orbit W75 degrees) Daily Electron Fluence GT 2 MeV 1.80e+06 e/(cm2-ster-day) (GOES-16 satellite synchronous orbit W75 degrees) 3 Hour K-indices: Boulder ? ? ? ? ? ? ? ? Planetary 4 3 4 3 2 3 2 2 F. Comments: None.