:Product: 0923SGAS.txt :Issued: 2025 Sep 23 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 266 Issued at 0245Z on 23 Sep 2025 This report is compiled from data received at SWO on 22 Sep A. Energetic Events Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 0637 0637 0637 250 0921 0921 0921 110 1104 1104 1104 180 1105 1106 1106 140 1116 1116 1116 130 1251 1251 1252 200 1324 1324 1324 100 1530 1530 1530 120 B. Proton Events: None C. Geomagnetic Activity Summary: The geomagnetic field was at quiet to unsettled levels. D. Stratwarm: Not Available E. Daily Indices: (real-time preliminary/estimated values) 10 cm 172 SSN 152 Afr/Ap 012/??? X-ray Background C1.0 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 5.2e+06 GT 10 MeV 1.6e+04 p/(cm2-ster-day) (GOES-18 satellite synchronous orbit W137 degrees) Daily Electron Fluence GT 2 MeV 3.50e+07 e/(cm2-ster-day) (GOES-19 satellite synchronous orbit W75 degrees) 3 Hour K-indices: Boulder 3 2 2 2 3 4 3 3 Planetary 3 2 2 3 3 3 3 3 F. Comments: None