:Product: 19990227SGAS.txt :Issued: 1999 Feb 27 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 058 ISSUED AT 0245Z ON 27 FEB 1999 THIS REPORT IS COMPILED FROM DATA RECEIVED AT SWO ON 26 FEB A. ENERGETIC EVENTS BEGIN MAX END RGN LOC XRAY OP 245MHZ 10CM SWEEP 0817 0818 0818 110 B. PROTON EVENTS: NONE C. GEOMAGNETIC ACTIVITY SUMMARY: QUIET D. STRATWARM: STRATWARM ALERT/FRIDAY/STRATWARM EXISTS. INTENSE WARMING CONTINUES. TEMPERATURE GRADIENT REVERSED BETWEEN 60N AND THE POLE THROUGHOUT THE STRATOSPHERE, AND MEAN ZONAL WIND AT 60N FROM THE EAST IN THE UPPER STRATOSPHERE. FINAL WARMING IN PROGRESS. E. DAILY INDICES: (REAL-TIME PRELIMINARY/ESTIMATED VALUES) 10 CM 116 SSN 070 AFR/AP 001/003 X-RAY BACKGROUND B2.1 DAILY PROTON FLUENCE (FLUX ACCUMULATION OVER 24 HRS) GT 1 MEV 1.4E+05 GT 10 MEV 1.7E+04 P/(CM2-STER-DAY) (GOES-8 SATELLITE SYNCHRONOUS ORBIT W75 DEGREES) DAILY ELECTRON FLUENCE GT 2 MEV 6.40E+06 E/(CM2-STER-DAY) (GOES-8 SATELLITE SYNCHRONOUS ORBIT W75 DEGREES) 3 HOUR K-INDICES: BOULDER 0 0 1 0 1 2 0 1 PLANETARY 0 0 0 0 1 2 1 1 F. COMMENTS: NONE