:Product: 1220SGAS.txt :Issued: 2025 Dec 20 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 354 Issued at 0245Z on 20 Dec 2025 This report is compiled from data received at SWO on 19 Dec A. Energetic Events Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 1535 1558 1608 M1.0 B. Proton Events: None C. Geomagnetic Activity Summary: The geomagnetic activity was at quiet levels. D. Stratwarm: Not Available E. Daily Indices: (real-time preliminary/estimated values) 10 cm 118 SSN 033 Afr/Ap 004/006 X-ray Background B5.9 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 5.1e+05 GT 10 MeV 1.5e+04 p/(cm2-ster-day) (GOES-18 satellite synchronous orbit W137 degrees) Daily Electron Fluence GT 2 MeV 1.10e+08 e/(cm2-ster-day) (GOES-19 satellite synchronous orbit W75 degrees) 3 Hour K-indices: Boulder 2 1 1 1 1 2 2 2 Planetary 2 2 1 1 1 2 2 2 F. Comments: None.