Viewing archive of Thursday, 25 February 1999
Geophysical report
Any mentioned solar flare in this report has a scaling factor applied by the Space Weather Prediction Center (SWPC). Because of the SWPC scaling factor, solar flares are reported as 42% smaller than for the science quality data. The scaling factor has been removed from our archived solar flare data to reflect the true physical units.
Solar and Geophysical Activity Summary 1999 Feb 25 0245 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Solar and Geophysical Activity Summary
SGAS Number 056 Issued at 0245Z on 25 FEB 1999 This report is compiled from data received at SWO on 24 FEBA. Energetic Events
Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 0151 0000 0206 II
B. Proton Events
None
C. Geomagnetic Activity Summary
QUIET TO ACTIVE
D. Stratwarm
STRATWARM ALERT/WEDNESDAY/STRATWARM EXISTS.
AN INTENSE WARMING,CENTERED OVER THE SIBERIAN ARCTIC,COVERS
THE WHOLE POLAR REGION,NORTHERN SIBERIA,ALASKA AND WESTERN
CANADA AT 10HPA.THE COLD CENTRE SOUTH OF ICELAND WEAKENING.
MEAN ZONAL WIND AT 60N WEAKENING IN THE LOWER AND MIDDLE
STRATOSPHERE AND REACHED EASTERLY DIRECTION AT 1HPA.TEMPERA-
TURE GRADIENT REVERSED BETWEEN 60N AND THE POLE AT 30HPA
AND ABOVE IN THE MIDDLE AND UPPER STRATOSPHERE.
FINAL WARMING IN PROGRESS.
E. Daily Indices: (real-time preliminary/estimated values)
10 CM 120 SSN 056 AFR/AP 006/011 X-RAY BACKGROUND B2.4 DAILY PROTON FLUENCE (FLUX ACCUMULATION OVER 24 HRS) GT 1 MEV 1.0E+06 GT 10 MEV 1.6E+04 P/(CM2-STER-DAY) (GOES-8 SATELLITE SYNCHRONOUS ORBIT W75 DEGREES) DAILY ELECTRON FLUENCE GT 2 MEV 3.10E+07 E/(CM2-STER-DAY) (GOES-8 SATELLITE SYNCHRONOUS ORBIT W75 DEGREES) 3 HOUR K-INDICES: BOULDER 1 2 3 3 3 3 2 2 PLANETARY 0 2 3 4 4 3 2 0
F. Comments
None
All times in UTC
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