:Product: 20030402SGAS.txt :Issued: 2003 Apr 02 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 092 Issued at 0245Z on 02 Apr 2003 This report is compiled from data received at SWO on 01 Apr A. Energetic Events Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 1010 1010 1015 220 B. Proton Events: None C. Geomagnetic Activity Summary: The geomagnetic field was at quiet to minor storm levels, with occasional major storming at high latitudes. The high speed stream that began early on 30 March continued during the period. The greater than 2 MeV electrons at geosynchronous orbit reached high levels. D. Stratwarm: None E. Daily Indices: (real-time preliminary/estimated values) 10 cm 153 SSN 161 Afr/Ap 016/012 X-ray Background B4.0 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 2.4e+05 GT 10 MeV 1.1e+04 p/(cm2-ster-day) (GOES-8 satellite synchronous orbit W75 degrees) Daily Electron Fluence GT 2 MeV 1.00e+08 e/(cm2-ster-day) (GOES-8 satellite synchronous orbit W75 degrees) 3 Hour K-indices: Boulder 4 4 2 2 3 3 3 3 Planetary 5 4 1 3 2 3 3 3 F. Comments: Beginning 1500 UTC April 8, SEC will begin using data from the GOES 12 satellite, and stop receiving GOES 8 data. GOES 12 has the new Solar X-Ray Imager (SXI), which will acquire real-time, operational images of the solar x-ray flux. With the switch from GOES 8 to GOES 12, the primary/secondary designations will change. GOES 12 will be the primary satellite for the SXI. All other data, including magnetometer, XRS x-ray measurements, and energetic particles, will have GOES 10 as their primary source, with GOES 12 as the secondary source where available. Please see http://www.sec.noaa.gov/GOES.html for important information on this changeover.