:Product: 0525SGAS.txt :Issued: 2007 May 25 0248 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 145 Issued at 0245Z on 25 May 2007 This report is compiled from data received at SWO on 24 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 ranged from unsettled to major storming. Extended periods of southward Bz starting on 23 May, combined with rising solar wind speeds, accounted for the most disturbed periods. Solar wind speed increased to approximately 650 km/s during the summary period due to a recurrent coronal hole rotating into a geoeffective position. D. Stratwarm: Not Available E. Daily Indices: (real-time preliminary/estimated values) 10 cm 070 SSN 000 Afr/Ap 018/028 X-ray Background LT A1.0 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 4.8e+06 GT 10 MeV 1.6e+04 p/(cm2-ster-day) (GOES-11 satellite synchronous orbit W136 degrees) Daily Electron Fluence GT 2 MeV 1.00e+08 e/(cm2-ster-day) (GOES-12 satellite synchronous orbit W75 degrees) 3 Hour K-indices: Boulder 5 5 4 3 3 3 2 3 Planetary 6 5 4 2 3 4 4 4 F. Comments: None