Viewing archive of Tuesday, 21 April 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 Apr 21 0245 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Solar and Geophysical Activity Summary
SGAS Number 111 Issued at 0245Z on 21 APR 1998 This report is compiled from data received at SWO on 20 APRA. Energetic Events
Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 0938 1021 1118 M1.4 II
B. Proton Events
GREATER THAN 10 AND 100 MEV EVENTS IN PROGRESS.
GREATER THAN 10 MEV EVENT STARTED AT 20/1400Z, WITH 450 PFU PEAK
FLUX SO FAR. GREATER THAN 100 MEV EVENT STARTED AT 20/1710Z, WITH
2.3 PFU PEAK FLUX SO FAR.
C. Geomagnetic Activity Summary
THE GEOMAGNETIC FIELD HAS BEEN
QUIET TO ACTIVE FOR THE PAST 24 HOURS.
D. Stratwarm
None.
E. Daily Indices: (real-time preliminary/estimated values)
10 CM 098 SSN 035 AFR/AP 010/010 X-RAY BACKGROUND B2.0 DAILY PROTON FLUENCE (FLUX ACCUMULATION OVER 24 HRS) GT 1 MEV 1.2E+07 GT 10 MEV 6.8E+06 P/(CM2-STER-DAY) GOES-9 SATELLITE SYNCHRONOUS ORBIT W135 DEGREES) DAILY ELECTRON FLUENCE GT 2 MEV 1.00E+06 E/(CM2-STER-DAY) GOES-9 SATELLITE SYNCHRONOUS ORBIT W135 DEGREES) 3 HOUR K-INDICES: BOULDER 0 2 4 2 3 2 1 2 PLANETARY 0 2 3 3 4 2 2 2
F. Comments
None
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