:Product: 19990417SGAS.txt
:Issued: 1999 Apr 17 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 107 ISSUED AT 0245Z ON 17 APR 1999
THIS REPORT IS COMPILED FROM DATA RECEIVED AT SWO ON 16 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 WAS QUIET
UNTIL 16/1126Z WHEN A SUDDEN IMPULSE OCCURRED. THIS WAS FOLLOWED BY
UNSETTLED TO ACTIVE CONDITIONS FOR THE REMAINDER OF THE PERIOD. SOME
HIGH LATITUDE SITES EXPERIENCED MINOR STORMING AT THE END OF THE
PERIOD. MAGNETOPAUSE CROSSINGS WERE OBSERVED ON THE GOES-8
GEOSYNCHRONOUS SPACECRAFT AT W74 FROM 16/1515-1820Z.
D.  STRATWARM:  NONE.
E.  DAILY INDICES: (REAL-TIME PRELIMINARY/ESTIMATED VALUES)
10 CM 123  SSN 087  AFR/AP 012/014   X-RAY BACKGROUND B2.8
DAILY PROTON FLUENCE (FLUX ACCUMULATION OVER 24 HRS)
GT 1 MEV 3.0E+05   GT 10 MEV 1.4E+04 P/(CM2-STER-DAY)
(GOES-8 SATELLITE SYNCHRONOUS ORBIT W75 DEGREES)
DAILY ELECTRON FLUENCE
GT 2 MEV 1.00E+07 E/(CM2-STER-DAY)
(GOES-8 SATELLITE SYNCHRONOUS ORBIT W75 DEGREES)
3 HOUR K-INDICES:
BOULDER 1 1 1 2 3 4 3 4 PLANETARY 1 1 0 2 3 4 3 5
F.  COMMENTS:  NONE