:Product: 19981218SGAS.txt
:Issued: 1998 Dec 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 352 ISSUED AT 0245Z ON 18 DEC 1998
THIS REPORT IS COMPILED FROM DATA RECEIVED AT SWO ON 17 DEC
A.  ENERGETIC EVENTS
BEGIN  MAX  END  RGN   LOC   XRAY  OP 245MHZ 10CM   SWEEP
0740 0745 0749  8409 S27W46 M3.2  1N 6500   200    II
1412 1418 1422  8409 S28W51 C7.2  SN 610    96     II
1458 1458 1458                       130
1746 1753 1757  8415 N17E70 C6.4  1F 110    31
1809 1815 1837  8408 S16W66 C4.5  SF 190
B.  PROTON EVENTS:  NONE
C.  GEOMAGNETIC ACTIVITY SUMMARY:  QUIET
D.  STRATWARM:  STRATWARM ALERT/THURSDAY/STRATWARM EXISTS.
MAJOR WARMING EXISTS.
A STRONG ANTICYCLONE AND A VERY INTENSE WARMING OVER THE SI-
BERIAN/CANADIAN ARCTIC DOMINATE THE POLAR REGION AND DISPLA-
CE THE VORTEX CENTRE TO THE CENTRAL URAL AREA. MEAN ZONAL
WIND AT 60N IS FROM EAST AT 10HPA AND ABOVE IN THE UPPER
STRATOSPHERE AND THE TEMPERATURE GRADIENT REVERSED BETWEEN
60N AND THE POLE IN THE WHOLE STRATOSPHERE.
E.  DAILY INDICES: (REAL-TIME PRELIMINARY/ESTIMATED VALUES)
10 CM 146  SSN 093  AFR/AP 000/002   X-RAY BACKGROUND B5.8
DAILY PROTON FLUENCE (FLUX ACCUMULATION OVER 24 HRS)
GT 1 MEV 1.7E+05   GT 10 MEV 1.6E+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 0 0 1 0 0 1 0 0 PLANETARY 0 0 0 0 0 1 1 0
F.  COMMENTS:  NONE