:Product: 19990421SGAS.txt :Issued: 1999 Apr 21 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 111 ISSUED AT 0245Z ON 21 APR 1999 THIS REPORT IS COMPILED FROM DATA RECEIVED AT SWO ON 20 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 MOSTLY UNSETTLED TO ACTIVE FOR THE PAST 24 HOURS, WITH A SINGLE PERIOD OF MINOR STORM CONDITIONS RECORDED IN BOULDER DURING THE PERIOD 20/1500-1800Z. D. STRATWARM: NONE. E. DAILY INDICES: (REAL-TIME PRELIMINARY/ESTIMATED VALUES) 10 CM 105 SSN 079 AFR/AP 015/021 X-RAY BACKGROUND B2.1 DAILY PROTON FLUENCE (FLUX ACCUMULATION OVER 24 HRS) GT 1 MEV 3.3E+05 GT 10 MEV 1.4E+04 P/(CM2-STER-DAY) (GOES-8 SATELLITE SYNCHRONOUS ORBIT W75 DEGREES) DAILY ELECTRON FLUENCE GT 2 MEV 4.50E+06 E/(CM2-STER-DAY) (GOES-8 SATELLITE SYNCHRONOUS ORBIT W75 DEGREES) 3 HOUR K-INDICES: BOULDER 4 3 4 4 4 5 3 2 PLANETARY 4 4 4 4 4 4 3 2 F. COMMENTS: NONE