:Product: 0921SGAS.txt :Issued: 2023 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 2023 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 0000 0420 IV 0200 0200 0200 220 0217 0217 0217 230 0323 0323 0323 100 0427 0437 0446 C3.0 110 0450 0450 0450 110 0518 0518 0519 1100 0638 0652 0708 3429 C2.3 270 0956 0956 0956 100 1411 1419 1425 3435 M8.2 1425 1433 II 2317 2321 2325 C2.3 260 B. Proton Events: None C. Geomagnetic Activity Summary: The geomagnetic field was at unsettled to active levels. D. Stratwarm: Not Available E. Daily Indices: (real-time preliminary/estimated values) 10 cm 156 SSN 159 Afr/Ap 015/020 X-ray Background B9.4 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 1.2e+05 GT 10 MeV 1.7e+04 p/(cm2-ster-day) (GOES-16 satellite synchronous orbit W75 degrees) Daily Electron Fluence GT 2 MeV 7.10e+07 e/(cm2-ster-day) (GOES-16 satellite synchronous orbit W75 degrees) 3 Hour K-indices: Boulder 3 3 4 4 3 3 2 3 Planetary 3 3 4 4 3 4 4 4 F. Comments: None