:Product: 20010816SGAS.txt :Issued: 2001 Aug 16 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 228 Issued at 0245Z on 16 Aug 2001 This report is compiled from data received at SWO on 15 Aug 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 has been mainly quiet, with isolated unsettled periods. Greater than 2 MeV electron flux at geosynchronous orbit reached moderate enhancement levels today. D. Stratwarm: None E. Daily Indices: (real-time preliminary/estimated values) 10 cm 147 SSN 155 Afr/Ap 007/009 X-ray Background B4.8 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 5.2e+05 GT 10 MeV 3.4e+04 p/(cm2-ster-day) (GOES-8 satellite synchronous orbit W75 degrees) Daily Electron Fluence GT 2 MeV 1.30e+07 e/(cm2-ster-day) (GOES-8 satellite synchronous orbit W75 degrees) 3 Hour K-indices: Boulder 2 2 2 1 2 3 2 2 Planetary 2 3 3 2 2 3 3 2 F. Comments: Afr estimated from Boulder A. At product issue time, a 100 MeV proton event is in early stages of development. Solar source of this activity is not presently known, but is likely from a backside event behind the west limb.