:Product: 20010219SGAS.txt :Issued: 2001 Feb 19 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 050 Issued at 0245Z on 19 Feb 2001 This report is compiled from data received at SWO on 18 Feb A. Energetic Events Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep None B. Proton Events: None C. Geomagnetic Activity Summary: Quiet D. Stratwarm: STRATWARM ALERT EXISTS STRATWARM SUNDAY MAJOR WARMING CONTINUES. A LARGE WARM AREA COVERS THE POLAR REGION, SIBERIA, EUROPE AND THE EASTERN ATLANTIC LEADING TO A REVERSED TEMPERATURE GRADIENT BETWEEN 60N AND THE POLE UP TO 3 HPA. A POLAR ANTICYCLONE AND A SPLIT, SOUTHWARD DISPLACED VORTEX LEAD TO NET EASTERLY WINDS AT LATITUDE 60N THROUGHOUT THE STRATOSPHERE. E. Daily Indices: (real-time preliminary/estimated values) 10 cm 132 SSN 143 Afr/Ap 002/004 X-ray Background B2.1 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 4.3e+05 GT 10 MeV 1.1e+04 p/(cm2-ster-day) (GOES-8 satellite synchronous orbit W75 degrees) Daily Electron Fluence GT 2 MeV 4.70e+07 e/(cm2-ster-day) (GOES-8 satellite synchronous orbit W75 degrees) 3 Hour K-indices: Boulder 1 0 0 0 1 2 1 1 Planetary 1 0 0 0 1 2 2 2 F. Comments: None