:Product: 19990731SGAS.txt :Issued: 1999 Jul 31 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 212 ISSUED AT 0245Z ON 31 JUL 1999 THIS REPORT IS COMPILED FROM DATA RECEIVED AT SWO ON 30 JUL A. ENERGETIC EVENTS BEGIN MAX END RGN LOC XRAY OP 245MHZ 10CM SWEEP 0716 0720 0724 8651 N25E46 C3.9 SF 110 1509 1520 1526 8649 S15W28 M1.7 1B 1200 56 B. PROTON EVENTS: NONE. C. GEOMAGNETIC ACTIVITY SUMMARY: THE GEOMAGNETIC FIELD WAS QUIET TO UNSETTLED UNTIL NEAR 30/0900Z. THEREAFTER, THE FIELD WAS AT GENERALLY ACTIVE TO MAJOR STORM LEVELS. SOME SEVERE STORMING WAS OBSERVED AT HIGH LATITUDES. A SUDDEN STORM COMMENCEMENT OF 89 NT WAS OBSERVED AT 30/1948Z. D. STRATWARM: NONE. E. DAILY INDICES: (REAL-TIME PRELIMINARY/ESTIMATED VALUES) 10 CM 206 SSN 218 AFR/AP 036/036 X-RAY BACKGROUND C1.7 DAILY PROTON FLUENCE (FLUX ACCUMULATION OVER 24 HRS) GT 1 MEV 7.7E+05 GT 10 MEV 1.5E+04 P/(CM2-STER-DAY) (GOES-8 SATELLITE SYNCHRONOUS ORBIT W75 DEGREES) DAILY ELECTRON FLUENCE GT 2 MEV 7.50E+05 E/(CM2-STER-DAY) (GOES-8 SATELLITE SYNCHRONOUS ORBIT W75 DEGREES) 3 HOUR K-INDICES: BOULDER 2 2 3 4 5 4 6 6 PLANETARY 3 2 3 4 5 4 6 6 F. COMMENTS: NONE.