:Product: 20040919SGAS.txt :Issued: 2004 Sep 19 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 263 Issued at 0245Z on 19 Sep 2004 This report is compiled from data received at SWO on 18 Sep A. Energetic Events Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep None B. Proton Events: None C. Geomagnetic Activity Summary: The geomagnetic field ranged from quiet to minor storm levels with a period of major storming between 18/0000 - 0300Z. The storm levels were in response to a prolonged period of southward IMF Bz and solar wind speeds near 500 km/s. The geomagnetic field was predominantly quiet to end the period as the solar wind speed declined to 400 km/s and IMF Bz was sustained north. D. Stratwarm: None E. Daily Indices: (real-time preliminary/estimated values) 10 cm 103 SSN 050 Afr/Ap 015/016 X-ray Background B1.9 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 1.5e+06 GT 10 MeV 1.7e+04 p/(cm2-ster-day) (GOES-11 satellite synchronous orbit W99 degrees) Daily Electron Fluence GT 2 MeV 9.80e+07 e/(cm2-ster-day) (GOES-12 satellite synchronous orbit W75 degrees) 3 Hour K-indices: Boulder 6 5 2 4 3 2 1 2 Planetary 5 5 1 3 3 2 1 2 F. Comments: None