:Product: 19990226SGAS.txt
:Issued: 1999 Feb 26 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 057 ISSUED AT 0245Z ON 26 FEB 1999
THIS REPORT IS COMPILED FROM DATA RECEIVED AT SWO ON 25 FEB
A.  ENERGETIC EVENTS
BEGIN  MAX  END  RGN   LOC   XRAY  OP 245MHZ 10CM   SWEEP
NONE
B.  PROTON EVENTS:  NONE
C.  GEOMAGNETIC ACTIVITY SUMMARY:  QUIET TO ACTIVE
D.  STRATWARM:  STRATWARM ALERT/THURSDAY/STRATWARM EXISTS.
AN INTENSE WARMING, CENTERED OVER THE SIBERIAN ARCTIC, COVERS
THE WHOLE POLAR REGION, SIBERIA, ALASKA AND WESTERN CANADA AT
10HPA.  A LOCAL WARMING EXISTS OVER CENTRAL AND EASTERN EURO-
PE, SPREADING NORTHEASTWARDS.  THE COLD CENTER SOUTH OF ICELAND IS
WEAKENING.  MEAN ZONAL WIND AT 60N IS WEAKENING IN THE LOWER AND
MIDDLE STRATOSPHERE AND REACHED EASTERLY DIRECTION IN THE UPPER
STRATOSPHERE.  TEMPERATURE GRADIENT REVERSED BETWEEN 60N AND THE
POLE AT 50HPA AND ABOVE IN THE MIDDLE AND UPPER STRATOSPHERE.  FINAL
WARMING IN PROGRESS.
E.  DAILY INDICES: (REAL-TIME PRELIMINARY/ESTIMATED VALUES)
10 CM 120  SSN 066  AFR/AP 005/007   X-RAY BACKGROUND B2.3
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 6.80E+06 E/(CM2-STER-DAY)
(GOES-8 SATELLITE SYNCHRONOUS ORBIT W75 DEGREES)
3 HOUR K-INDICES:
BOULDER 1 4 1 3 2 2 1 0 PLANETARY 0 4 1 3 1 2 1 1
F.  COMMENTS:  NONE