:Product: 20030217SGAS.txt :Issued: 2003 Feb 17 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 048 Issued at 0245Z on 17 Feb 2003 This report is compiled from data received at SWO on 16 Feb A. Energetic Events Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep None B. Proton Events: None C. Geomagnetic Activity Summary: The geomagnetic field was at quiet to active levels. Coronal hole effects continue with solar wind gradually increasing to near 650 km/s and Bz continuing to be, on average, slightly southward. Major storming conditions were observed at higher latitudes. D. Stratwarm: STRATWARM ALERT/SUNDAY/STRATWARM EXISTS. STRONG WAVE TWO CIRCULATION PATTERN THROUGHOUT THE STRATOSPHERE. REVERSED TEMPERATURE GRADIENT BETWEEN 60N AND THE NORTH POLE FROM 30 HPA UP TO 1 HPA AND EASTERLY ZONAL MEAN WINDS AT 1 AND 2 HPA. EASTERLY ZONAL MEAN WINDS AT 60N EXPECTED THROUGHOUT THE UPPER STRATOSPHERE WITHIN THE NEXT DAYS AS WELL AS A REVERSED TEMPERATURE GRADIENT THROUGHOUT THE STRATOSPHERE. E. Daily Indices: (real-time preliminary/estimated values) 10 cm 119 SSN 041 Afr/Ap 013/015 X-ray Background B2.8 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 7.4e+05 GT 10 MeV 1.3e+04 p/(cm2-ster-day) (GOES-8 satellite synchronous orbit W75 degrees) Daily Electron Fluence GT 2 MeV 3.40e+07 e/(cm2-ster-day) (GOES-8 satellite synchronous orbit W75 degrees) 3 Hour K-indices: Boulder 2 2 4 3 3 3 2 3 Planetary 2 3 4 3 4 3 3 4 F. Comments: None