:Product: 0921SGAS.txt :Issued: 2025 Sep 21 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 264 Issued at 0245Z on 21 Sep 2025 This report is compiled from data received at SWO on 20 Sep A. Energetic Events Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 0007 0007 0007 480 0145 0145 0145 140 0749 0749 0749 100 0825 0825 0826 230 0829 0829 0830 100 0923 0923 0923 230 1343 1343 1343 130 1346 1347 1347 160 1654 1654 1654 140 1850 1850 1850 100 B. Proton Events: None C. Geomagnetic Activity Summary: Field conditions were at quiet levels. D. Stratwarm: Not Available E. Daily Indices: (real-time preliminary/estimated values) 10 cm 166 SSN 155 Afr/Ap 005/005 X-ray Background B9.4 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 5.0e+06 GT 10 MeV 1.6e+04 p/(cm2-ster-day) (GOES-18 satellite synchronous orbit W137 degrees) Daily Electron Fluence GT 2 MeV 2.40e+08 e/(cm2-ster-day) (GOES-19 satellite synchronous orbit W75 degrees) 3 Hour K-indices: Boulder 1 2 3 1 2 2 1 1 Planetary ? ? ? ? ? ? ? ? F. Comments: None