Viewing archive of Wednesday, 21 October 1998
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 1998 Oct 21 0245 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Solar and Geophysical Activity Summary
SGAS Number 294 Issued at 0245Z on 21 OCT 1998 This report is compiled from data received at SWO on 20 OCTA. Energetic Events
Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 2322 0000 2323 II
B. Proton Events
None
C. Geomagnetic Activity Summary
THE GEOMAGNETIC FIELD WAS QUIET TO
ACTIVE. ACTIVE CONDITIONS OCCURRED AT ALL LATITUDES AFTER 20/1800Z
WITH BRIEF MINOR TO MAJOR STORM PERIODS DETECTED AT HIGH LATITUDES.
IT APPEARED THE FIELD WAS AFFECTED BY A HIGH-SPEED CORONAL HOLE WIND
STREAM.
D. Stratwarm
None
E. Daily Indices: (real-time preliminary/estimated values)
10 CM 121 SSN 104 AFR/AP 013/017 X-RAY BACKGROUND B6.7 DAILY PROTON FLUENCE (FLUX ACCUMULATION OVER 24 HRS) GT 1 MEV 9.2E+05 GT 10 MEV 3.9E+04 P/(CM2-STER-DAY) (GOES-8 SATELLITE SYNCHRONOUS ORBIT W75 DEGREES) DAILY ELECTRON FLUENCE GT 2 MEV 1.50E+07 E/(CM2-STER-DAY) (GOES-8 SATELLITE SYNCHRONOUS ORBIT W75 DEGREES) 3 HOUR K-INDICES: BOULDER 2 3 2 3 2 2 4 3 PLANETARY 3 3 3 3 2 3 4 4
F. Comments
THE TYPE II SWEEP WAS OF WEAK INTENSITY WITH AN IPS ESTIMATED SHOCK VELOCITY OF 1100 KM/SEC.
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