:Product: 20030428SGAS.txt :Issued: 2003 Apr 28 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 118 Issued at 0245Z on 28 Apr 2003 This report is compiled from data received at SWO on 27 Apr A. Energetic Events Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 0042 0042 0042 180 0050 0101 0121 0338 N21W67 C9.3 2f 690 0053 0053 0053 640 0106 0108 0108 160 0737 0740 0743 0338 C8.1 1900 1527 1532 1535 0338 N21W85 M1.7 Sf 1600 65 B. Proton Events: None C. Geomagnetic Activity Summary: The geomagnetic field was at quiet to active levels. An increase of 150 km/s in the solar wind speed during the period is believed to be the result of a recurrent coronal hole. The greater than 2 MeV electron fluxes at geosynchronous orbit reached high levels again today. D. Stratwarm: None E. Daily Indices: (real-time preliminary/estimated values) 10 cm 154 SSN 200 Afr/Ap 015/015 X-ray Background B7.2 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 1.3e+06 GT 10 MeV 4.0e+04 p/(cm2-ster-day) (GOES-10 satellite synchronous orbit W135 degrees) Daily Electron Fluence GT 2 MeV 3.90e+08 e/(cm2-ster-day) (GOES-10 satellite synchronous orbit W135 degrees) 3 Hour K-indices: Boulder 3 4 2 1 3 4 3 3 Planetary 3 4 3 3 3 4 3 3 F. Comments: None