:Product: 0928SGAS.txt :Issued: 2025 Sep 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 271 Issued at 0245Z on 28 Sep 2025 This report is compiled from data received at SWO on 27 Sep A. Energetic Events Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 0232 0240 0244 4232 N03E73 C3.6 Sf 120 0329 0359 0418 4226 S15W10 M1.0 Sf 0418 0423 0427 4226 N18E77 M1.1 Sf 0434 0434 0434 520 0703 0714 0718 4232 N03E71 M1.1 Sf 2200 0906 0906 0907 590 1751 1756 1759 4232 C7.6 160 2053 2058 2103 4233 N20E62 C3.1 Sf 460 B. Proton Events: None C. Geomagnetic Activity Summary: Field activity was at quiet to unsettled levels. D. Stratwarm: Not Available E. Daily Indices: (real-time preliminary/estimated values) 10 cm 164 SSN 172 Afr/Ap 005/NA X-ray Background C1.5 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 1.3e+06 GT 10 MeV 1.6e+04 p/(cm2-ster-day) (GOES-18 satellite synchronous orbit W137 degrees) Daily Electron Fluence GT 2 MeV 5.30e+07 e/(cm2-ster-day) (GOES-19 satellite synchronous orbit W75 degrees) 3 Hour K-indices: Boulder 1 1 1 1 2 2 2 3 Planetary ? ? ? ? ? ? ? ? F. Comments: None