:Product: 20050518SGAS.txt :Issued: 2005 May 18 0250 UT # 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 138 Issued at 0245Z on 18 May 2005 This report is compiled from data received at SWO on 17 May A. Energetic Events Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 0231 0239 0252 0763 S16W01 M1.8 1b 66 100 II/IV 0255 0000 0404 IV 0256 0000 0417 IV 0257 0316 0353 1800 0547 0553 0555 0763 S16W04 C2.8 Sf 130 2354 0001 0005 0763 S16E06 B7.3 Sf IV B. Proton Events: None C. Geomagnetic Activity Summary: The geomagnetic field was quiet to active. Solar wind speed at ACE ranged from 600 km/s to 450 km/s. D. Stratwarm: Not Available E. Daily Indices: (real-time preliminary/estimated values) 10 cm 090 SSN 045 Afr/Ap 012/019 X-ray Background B1.4 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 1.2e+07 GT 10 MeV 4.2e+04 p/(cm2-ster-day) (GOES-11 satellite synchronous orbit W114 degrees) Daily Electron Fluence GT 2 MeV 1.80e+09 e/(cm2-ster-day) (GOES-12 satellite synchronous orbit W76 degrees) 3 Hour K-indices: Boulder 4 4 4 3 4 3 2 3 Planetary 4 4 4 3 3 3 2 3 F. Comments: The greater than 2 MeV electron fluence at geosynchronous orbit was high today.