:Product: 0423SGAS.txt :Issued: 2011 Apr 23 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 113 Issued at 0245Z on 23 Apr 2011 This report is compiled from data received at SWO on 22 Apr A. Energetic Events Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 0217 0217 0217 150 0221 0221 0221 140 0435 0457 0514 1195 S18E43 M1.8 Sn 0708 0732 0735 1195 S17E40 C1.8 Sf 1200 1200 1200 100 1204 1204 1211 1195 S16E35 Sf 110 1547 1553 1611 1195 S18E35 M1.2 1n B. Proton Events: None C. Geomagnetic Activity Summary: The geomagnetic field was predominantly quiet. Isolated unsettled and minor storm levels were observed at high latitudes. D. Stratwarm: Not Available E. Daily Indices: (real-time preliminary/estimated values) 10 cm 115 SSN 103 Afr/Ap 003/006 X-ray Background B8.4 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 7.7e+04 GT 10 MeV 1.2e+04 p/(cm2-ster-day) (GOES-13 satellite synchronous orbit W76 degrees) Daily Electron Fluence GT 2 MeV 4.70e+06 e/(cm2-ster-day) (GOES-13 satellite synchronous orbit W76 degrees) 3 Hour K-indices: Boulder 2 1 1 2 2 2 2 1 Planetary 3 2 0 2 2 2 2 1 F. Comments: None