:Product: 20020223SGAS.txt :Issued: 2002 Feb 23 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 054 Issued at 0245Z on 23 Feb 2002 This report is compiled from data received at SWO on 22 Feb A. Energetic Events Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 2349 0010 0027 9830 S20W20 M4.4 2n 89 B. Proton Events: None C. Geomagnetic Activity Summary: The geomagnetic field was mostly quiet with isolated unsettled periods. D. Stratwarm: STRATWARM ALERT EXISTS STRATWARM FRIDAY THROUGHOUT THE STRATOSPHERE, STILL DISTURBED CIRCULATION PATTERN AFTER THE MAJOR WARMING WITH A REVERSED TEMPERATURE GRADIENT BETWEEN 60N AND THE POLE FROM 50HPA UP TO 2HPA AND MEAN ZONAL EASTERLY WINDS AT 60N FROM 5HPA TO 1HPA. E. Daily Indices: (real-time preliminary/estimated values) 10 cm 192 SSN 161 Afr/Ap 005/005 X-ray Background C5.0 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 5.2e+05 GT 10 MeV 1.8e+04 p/(cm2-ster-day) (GOES-8 satellite synchronous orbit W75 degrees) Daily Electron Fluence GT 2 MeV 2.30e+05 e/(cm2-ster-day) (GOES-8 satellite synchronous orbit W75 degrees) 3 Hour K-indices: Boulder 1 2 1 1 2 3 3 3 Planetary 2 2 0 1 1 2 3 2 F. Comments: None