:Product: 1221SGAS.txt :Issued: 2021 Dec 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 355 Issued at 0245Z on 21 Dec 2021 This report is compiled from data received at SWO on 20 Dec A. Energetic Events Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 1112 1136 1155 2908 S22W05 M1.8 1n 240 II B. Proton Events: None C. Geomagnetic Activity Summary: The geomagnetic field was quiet to active D. Stratwarm: Not Available E. Daily Indices: (real-time preliminary/estimated values) 10 cm 123 SSN 115 Afr/Ap 013/011 X-ray Background B6.8 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 2.0e+05 GT 10 MeV 4.4e+04 p/(cm2-ster-day) (GOES-16 satellite synchronous orbit W75 degrees) Daily Electron Fluence GT 2 MeV 1.80e+06 e/(cm2-ster-day) (GOES-16 satellite synchronous orbit W75 degrees) 3 Hour K-indices: Boulder 4 3 2 4 3 3 2 3 Planetary 3 3 2 3 2 3 1 2 F. Comments: None