:Product: 20040921SGAS.txt :Issued: 2004 Sep 21 0250 UT # 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 265 Issued at 0245Z on 21 Sep 2004 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 0403 0404 0404 110 B. Proton Events: The greater than 10 MeV proton event that began yesterday, has ended. The start time was 19/1925Z and the maximum of 57 pfu occurred at 20/0100Z. The event ended at 20/1205Z. C. Geomagnetic Activity Summary: The geomagnetic field ranged from quiet to unsettled levels with an isolated active period from 0600-0900Z. The active level followed a period of southward IMF Bz. D. Stratwarm: None. E. Daily Indices: (real-time preliminary/estimated values) 10 cm 101 SSN 059 Afr/Ap 012/013 X-ray Background B1.9 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 9.3e+06 GT 10 MeV 1.0e+06 p/(cm2-ster-day) (GOES-11 satellite synchronous orbit W99 degrees) Daily Electron Fluence GT 2 MeV 1.80e+07 e/(cm2-ster-day) (GOES-12 satellite synchronous orbit W75 degrees) 3 Hour K-indices: Boulder 3 1 4 3 3 2 1 1 Planetary 3 1 4 3 3 2 2 2 F. Comments: None.