:Product: 20030526SGAS.txt :Issued: 2003 May 26 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 146 Issued at 0245Z on 26 May 2003 This report is compiled from data received at SWO on 25 May 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 quiet to minor storm levels. An oscillating Bz component of the interplanetary magnetic field allowed for two consecutive periods of minor storm conditions at both the middle and high latitudes during local nighttime hours. Elevated conditions are due to a high speed stream coronal hole. The greater than 2 MeV electron fluxes at geosynchronous orbit reached high levels today. D. Stratwarm: None E. Daily Indices: (real-time preliminary/estimated values) 10 cm 121 SSN 051 Afr/Ap 023/022 X-ray Background B2.5 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 3.1e+05 GT 10 MeV 1.2e+04 p/(cm2-ster-day) (GOES-8 satellite synchronous orbit W102 degrees) Daily Electron Fluence GT 2 MeV 9.90e+07 e/(cm2-ster-day) (GOES-12 satellite synchronous orbit W75 degrees) 3 Hour K-indices: Boulder 5 5 4 3 2 3 3 3 Planetary 5 5 4 3 2 4 3 4 F. Comments: None