:Product: 20030416SGAS.txt :Issued: 2003 Apr 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 106 Issued at 0245Z on 16 Apr 2003 This report is compiled from data received at SWO on 15 Apr 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 was at unsettled to minor storm levels. Solar wind velocity was elevated near 575 km/s and a prolonged period of southward Bz produced active conditions for most of the day with one period of isolated minor storm levels. By the end of the day Bz shifted northward and activity has subsided to unsettled levels. Greater than 2 MeV electron flux reached high levels. D. Stratwarm: None E. Daily Indices: (real-time preliminary/estimated values) 10 cm 101 SSN 054 Afr/Ap 024/022 X-ray Background B1.0 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 1.2e+06 GT 10 MeV 1.1e+04 p/(cm2-ster-day) (GOES-10 satellite synchronous orbit W135 degrees) Daily Electron Fluence GT 2 MeV 3.30e+07 e/(cm2-ster-day) (GOES-10 satellite synchronous orbit W135 degrees) 3 Hour K-indices: Boulder 4 4 4 5 4 3 2 3 Planetary 4 4 4 5 4 2 2 3 F. Comments: None