:Product: 0828SGAS.txt :Issued: 2025 Aug 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 240 Issued at 0245Z on 28 Aug 2025 This report is compiled from data received at SWO on 27 Aug A. Energetic Events Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 0414 0414 0414 520 B. Proton Events: The greater than 10 MeV proton event that began at 25/1355z, reached a peak flux of 13.9 pfu at 27/0740z and ended at 27/1505z. 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 226 SSN 227 Afr/Ap 009/008 X-ray Background C2.1 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 2.4e+07 GT 10 MeV 8.6e+05 p/(cm2-ster-day) (GOES-18 satellite synchronous orbit W137 degrees) Daily Electron Fluence GT 2 MeV 1.30e+07 e/(cm2-ster-day) (GOES-19 satellite synchronous orbit W75 degrees) 3 Hour K-indices: Boulder 2 1 1 1 4 3 2 2 Planetary 1 1 1 3 3 2 2 2 F. Comments: None.