:Product: 19981223SGAS.txt
:Issued: 1998 Dec 23 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 357 ISSUED AT 0245Z ON 23 DEC 1998
THIS REPORT IS COMPILED FROM DATA RECEIVED AT SWO ON 22 DEC
A.  ENERGETIC EVENTS
BEGIN  MAX  END  RGN   LOC   XRAY  OP 245MHZ 10CM   SWEEP
0910 0912 0913                       160
2347 2347 2348                       770
B.  PROTON EVENTS:  NONE.
C.  GEOMAGNETIC ACTIVITY SUMMARY:  THE GEOMAGNETIC FIELD HAS BEEN
QUIET FOR THE PAST 24 HOURS, WITH A SINGLE PERIOD OF UNSETTLED
CONDITIONS RECORDED AT HIGH LATITUDES DURING THE INTERVAL 22/1800 -
2100Z.
D.  STRATWARM:  STRATWARM ALERT/TUESDAY/STRATWARM EXISTS.
THE INTENSE WARMING,CENTRED OVER NORTH SIBERIA AND THE ADJA-
CENT ARCTIC CONTINUOUSLY WEAKENING. THE ANTICYCLONE BETWEEN
GREENLAND AND NORWAY WEAKENING TOO.
MEAN ZONAL WIND AT 60N IS NO LONGER FROM EAST AND THE TEMPE-
RATURE GRADIENT REVERSED BETWEEN 60N AND THE POLE ONLY STILL
IN THE MIDDLE STRATOSPHERE.
END OF THIS GEOALERT.
E.  DAILY INDICES: (REAL-TIME PRELIMINARY/ESTIMATED VALUES)
10 CM 129  SSN 056  AFR/AP 005/005   X-RAY BACKGROUND B5.9
DAILY PROTON FLUENCE (FLUX ACCUMULATION OVER 24 HRS)
GT 1 MEV 7.0E+05   GT 10 MEV 1.8E+04 P/(CM2-STER-DAY)
(GOES-8 SATELLITE SYNCHRONOUS ORBIT W75 DEGREES)
DAILY ELECTRON FLUENCE
GT 2 MEV 3.80E+06 E/(CM2-STER-DAY)
(GOES-8 SATELLITE SYNCHRONOUS ORBIT W75 DEGREES)
3 HOUR K-INDICES:
BOULDER 1 1 2 1 1 1 2 0 PLANETARY 1 1 1 0 1 2 3 2
F.  COMMENTS:  NONE.