:Product: 19990428SGAS.txt :Issued: 1999 Apr 28 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 118 ISSUED AT 0245Z ON 28 APR 1999 THIS REPORT IS COMPILED FROM DATA RECEIVED AT SWO ON 27 APR A. ENERGETIC EVENTS BEGIN MAX END RGN LOC XRAY OP 245MHZ 10CM SWEEP 1857 1857 1857 130 B. PROTON EVENTS: NONE C. GEOMAGNETIC ACTIVITY SUMMARY: THE GEOMAGNETIC FIELD RANGED FROM QUIET TO ACTIVE LEVELS WITH ISOLATED MINOR TO MAJOR STORM PERIODS DETECTED AT SOME HIGH LATITUDE STATIONS. D. STRATWARM: NONE E. DAILY INDICES: (REAL-TIME PRELIMINARY/ESTIMATED VALUES) 10 CM 109 SSN 082 AFR/AP 010/014 X-RAY BACKGROUND B1.8 DAILY PROTON FLUENCE (FLUX ACCUMULATION OVER 24 HRS) GT 1 MEV 2.4E+05 GT 10 MEV 2.4E+04 P/(CM2-STER-DAY) (GOES-8 SATELLITE SYNCHRONOUS ORBIT W75 DEGREES) DAILY ELECTRON FLUENCE GT 2 MEV 8.50E+06 E/(CM2-STER-DAY) (GOES-8 SATELLITE SYNCHRONOUS ORBIT W75 DEGREES) 3 HOUR K-INDICES: BOULDER 1 1 3 3 3 3 3 3 PLANETARY 2 1 3 3 3 3 3 4 F. COMMENTS: NONE