:Product: 20030318SGAS.txt :Issued: 2003 Mar 18 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 077 Issued at 0245Z on 18 Mar 2003 This report is compiled from data received at SWO on 17 Mar A. Energetic Events Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 1850 1905 1916 0314 S14W39 X1.5 1b 500 520 2014 2021 2028 C6.9 150 25 2020 2021 2021 170 2023 2023 2025 240 2133 2133 2133 120 B. Proton Events: None C. Geomagnetic Activity Summary: The geomagnetic field ranged from unsettled to major storm levels under the influence of a coronal hole high-speed stream. Solar wind speeds remained above 600 km/s and Bz fluctuated between +/- 10 nT. D. Stratwarm: None E. Daily Indices: (real-time preliminary/estimated values) 10 cm 125 SSN 080 Afr/Ap 025/039 X-ray Background B3.0 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 2.3e+06 GT 10 MeV 1.5e+04 p/(cm2-ster-day) (GOES-8 satellite synchronous orbit W75 degrees) Daily Electron Fluence GT 2 MeV 8.40e+07 e/(cm2-ster-day) (GOES-8 satellite synchronous orbit W75 degrees) 3 Hour K-indices: Boulder 3 4 5 4 5 4 3 5 Planetary 3 4 6 4 6 4 4 5 F. Comments: The Afr index reported in Part E is estimated from Boulder observations.