:Product: 20011022SGAS.txt :Issued: 2001 Oct 22 0245 UTC # Prepared jointly by the U.S. Dept. of Commerce, NOAA, # Space Environment Center and the U.S. Air Force. # Joint USAF/NOAA Solar and Geophysical Activity Summary SGAS Number 295 Issued at 0245Z on 22 Oct 2001 This report is compiled from data received at SWO on 21 Oct A. Energetic Events Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 0018 0019 0019 170 0433 0437 0439 9670 C7.8 5100 6 II 0456 0456 0457 200 0509 0518 0527 M1.3 650 43 1112 1136 1148 9661 N13W56 M2.5 2n 100 1151 1157 1308 9661 N12W56 Sf 470 1153 1155 1155 110 B. Proton Events: None C. Geomagnetic Activity Summary: The geomagnetic field ranged from quiet to major storm levels. A strong shock was observed at ACE at 21/1614 UTC. This was followed by a sudden impulse at 21/1645 UTC (measured as 15 nt on the Boulder magnetometer). The sudden impulse was followed by minor (21/1500-1800 UTC) and major (21/1800-2400 UTC) storm levels. D. Stratwarm: None E. Daily Indices: (real-time preliminary/estimated values) 10 cm 224 SSN 239 Afr/Ap 033/040 X-ray Background C1.1 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 2.0e+07 GT 10 MeV 1.2e+05 p/(cm2-ster-day) (GOES-8 satellite synchronous orbit W75 degrees) Daily Electron Fluence GT 2 MeV 1.00e+06 e/(cm2-ster-day) (GOES-8 satellite synchronous orbit W75 degrees) 3 Hour K-indices: Boulder 2 2 3 3 3 5 6 6 Planetary 2 3 3 2 3 6 6 7 F. Comments: Afr based on Boulder A-Indices