:Product: 0827SGAS.txt :Issued: 2025 Aug 27 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 239 Issued at 0245Z on 27 Aug 2025 This report is compiled from data received at SWO on 26 Aug A. Energetic Events Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 0022 0030 0035 4199 M3.3 210 0509 0525 0540 4197 S21E47 M4.5 1n 150 310 0658 0658 0658 130 1339 1407 1432 4202 M1.0 B. Proton Events: The greater than 10 MeV proton flux reached a maximum of 12.1 pfu at 26/2155 UTC. 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 202 SSN 193 Afr/Ap 010/008 X-ray Background C2.8 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 7.0e+06 GT 10 MeV 7.6e+05 p/(cm2-ster-day) (GOES-18 satellite synchronous orbit W137 degrees) Daily Electron Fluence GT 2 MeV 1.20e+07 e/(cm2-ster-day) (GOES-19 satellite synchronous orbit W75 degrees) 3 Hour K-indices: Boulder 2 3 3 2 3 4 1 2 Planetary 2 3 2 3 2 1 1 2 F. Comments: None.