Viewing archive of Tuesday, 23 April 2002

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 2002 Apr 23 0245 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Solar and Geophysical Activity Summary

SGAS Number 113 Issued at 0245Z on 23 Apr 2002 This report is compiled from data received at SWO on 22 Apr
A. Energetic Events
Begin  Max  End  Rgn   Loc   Xray  Op 245MHz 10cm   Sweep
0448 0506 0520              C2.1     520
0739 0739 0739                       120
0800 0802 0802                       530
0806 0806 0806                       110
0831 0832 0832                       150
1154 1210 1220  9912 N12W19 C2.8  Sf        31     II
2114 2117 2117                       130
2229 2229 2230                       190
B. Proton Events
The greater than 100 MeV proton event that began at 21/0155 UTC reached a peak of 22.9 pfu at 21/1025 UTC and was in progress as the period ended. The greater than 10 MeV proton event that began at 21/0225 UTC reached a peak of 2520 pfu at 21/2320 UTC and was in progress as the period ended.
C. Geomagnetic Activity Summary
Geomagnetic field activity ranged from quiet to active levels. Active levels occurred during 22/0300 - 0600 UTC.
D. Stratwarm
None
E. Daily Indices: (real-time preliminary/estimated values)
10 cm 170  SSN 155  Afr/Ap 013/012   X-ray Background C1.0
Daily Proton Fluence (flux accumulation over 24 hrs)
GT 1 MeV 3.3e+08   GT 10 MeV 8.0e+07 p/(cm2-ster-day)
(GOES-8 satellite synchronous orbit W75 degrees)
Daily Electron Fluence
GT 2 MeV 5.60e+07 e/(cm2-ster-day)
(GOES-8 satellite synchronous orbit W75 degrees)
3 Hour K-indices
Boulder 3 4 2 3 2 3 3 2 Planetary 3 4 2 3 3 3 2 2
F. Comments
  Afr estimated, based on Boulder USGS magnetometer
data.

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