:Product: 19990418SGAS.txt :Issued: 1999 Apr 18 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 108 ISSUED AT 0245Z ON 18 APR 1999 THIS REPORT IS COMPILED FROM DATA RECEIVED AT SWO ON 17 APR 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 HAS BEEN QUIET TO MAJOR STORM AT MIDDLE LATITUDES, AND UNSETTLED TO SEVERE STORM AT HIGH LATITUDES FOR THE PAST 24 HOURS. D. STRATWARM: NONE. E. DAILY INDICES: (REAL-TIME PRELIMINARY/ESTIMATED VALUES) 10 CM 116 SSN 099 AFR/AP 030/047 X-RAY BACKGROUND B2.6 DAILY PROTON FLUENCE (FLUX ACCUMULATION OVER 24 HRS) GT 1 MEV 1.5E+05 GT 10 MEV 1.4E+04 P/(CM2-STER-DAY) (GOES-8 SATELLITE SYNCHRONOUS ORBIT W75 DEGREES) DAILY ELECTRON FLUENCE GT 2 MEV 3.80E+05 E/(CM2-STER-DAY) (GOES-8 SATELLITE SYNCHRONOUS ORBIT W75 DEGREES) 3 HOUR K-INDICES: BOULDER 6 6 5 4 3 3 3 1 PLANETARY 6 7 6 5 3 3 3 3 F. COMMENTS: NONE