:Product: 1112SGAS.txt :Issued: 2025 Nov 12 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 316 Issued at 0245Z on 12 Nov 2025 This report is compiled from data received at SWO on 11 Nov A. Energetic Events Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 0159 0200 0200 190 0207 0207 0207 140 0236 0238 II 0422 0435 0438 4274 N22W23 C3.5 Sf 890 0802 0809 0813 4274 N21W31 M1.4 Sf 0833 0838 0843 4274 N21W32 C6.8 Sf 880 0925 0926 0926 4274 400 0949 1004 1017 4274 N23W24 X5.1 3b 16000 10000 II B. Proton Events: 10 MeV protons reached a peak of 157 pfu on 11 Nov at 1505 UTC and 100 MeV protons reached a peak of 29 pfu at 1635 UTC. C. Geomagnetic Activity Summary: Field conditions were at quiet to unsettled levels. D. Stratwarm: Not Available E. Daily Indices: (real-time preliminary/estimated values) 10 cm 168 SSN 131 Afr/Ap 004/007 X-ray Background C1.3 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 6.4e+07 GT 10 MeV 5.7e+06 p/(cm2-ster-day) (GOES-18 satellite synchronous orbit W137 degrees) Daily Electron Fluence GT 2 MeV 2.20e+08 e/(cm2-ster-day) (GOES-19 satellite synchronous orbit W75 degrees) 3 Hour K-indices: Boulder 1 2 2 2 1 3 1 2 Planetary 2 3 2 2 0 1 1 3 F. Comments: Weak IP shock passage was observed by the ACE spacecraft at approximately 11/2221 UTC and again at 11/2338 UTC, with the latter being much more significant.