:Product: 0918SGAS.txt :Issued: 2024 Sep 18 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 262 Issued at 0245Z on 18 Sep 2024 This report is compiled from data received at SWO on 17 Sep A. Energetic Events Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 2240 2240 2240 140 B. Proton Events: The greater than 10 MeV proton flux levels increased above the S1 (Minor) threshold at 17/0735 UTC, reached a peak flux of 33 pfu at 17/1050 UTC and crossed below threshold at 17/1615 UTC. C. Geomagnetic Activity Summary: The geomagnetic field was at active to severe storm levels due to 14 Sep 2024 CME effects. D. Stratwarm: Not Available E. Daily Indices: (real-time preliminary/estimated values) 10 cm 165 SSN 140 Afr/Ap 039/064 X-ray Background C1.1 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 9.5e+07 GT 10 MeV 8.4e+05 p/(cm2-ster-day) (GOES-18 satellite synchronous orbit W137 degrees) Daily Electron Fluence GT 2 MeV 1.00e+07 e/(cm2-ster-day) (GOES-16 satellite synchronous orbit W75 degrees) 3 Hour K-indices: Boulder 7 6 5 4 5 4 3 3 Planetary 7 7 5 6 6 4 3 4 F. Comments: None