:Product: 0528SGAS.txt :Issued: 2026 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 2026 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 1207 1216 1219 4446 C3.4 3800 2059 2100 2100 250 2130 2130 2130 110 B. Proton Events: None C. Geomagnetic Activity Summary: The geomagnetic field was quiet to unsettled D. Stratwarm: Not Available E. Daily Indices: (real-time preliminary/estimated values) 10 cm 142 SSN 165 Afr/Ap 012/011 X-ray Background B7.8 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 9.3e+05 GT 10 MeV 4.8e+04 p/(cm2-ster-day) (GOES-18 satellite synchronous orbit W137 degrees) Daily Electron Fluence GT 2 MeV 1.60e+07 e/(cm2-ster-day) (GOES-19 satellite synchronous orbit W72 degrees) 3 Hour K-indices: Boulder 3 3 4 2 3 4 2 3 Planetary 2 2 3 2 1 3 3 3 F. Comments: None