:Product: 0525SGAS.txt :Issued: 2013 May 25 0245 UTC # Prepared jointly by the U.S. Dept. of Commerce, NOAA, # Space Weather Prediction Center and the U.S. Air Force. # Joint USAF/NOAA Solar and Geophysical Activity Summary SGAS Number 145 Issued at 0245Z on 25 May 2013 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 1513 1513 1513 760 2312 2312 2312 130 2332 2332 2332 230 B. Proton Events: The greater than 10 MeV proton flux which began 23/2330Z, reached a maximum of 1660 pfu at 23/0650Z, fell below the 1000 pfu threshold at 23/1040Zand fell below 100 pfu at 24/0435Z, ending the day at 13 pfu. C. Geomagnetic Activity Summary: The geomagnetic field ranged from quiet to major storm levels. D. Stratwarm: Not Available E. Daily Indices: (real-time preliminary/estimated values) 10 cm 127 SSN 099 Afr/Ap 017/023 X-ray Background B4.5 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 9.8e+07 GT 10 MeV 5.2e+06 p/(cm2-ster-day) (GOES-15 satellite synchronous orbit W135 degrees) Daily Electron Fluence GT 2 MeV 5.90e+07 e/(cm2-ster-day) (GOES-15 satellite synchronous orbit W135 degrees) 3 Hour K-indices: Boulder 2 3 3 2 3 3 5 4 Planetary 3 4 2 3 3 3 6 4 F. Comments: GOES-15 particle data is being used because of a GOES-13 outage.