Viewing archive of Friday, 26 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 26 0245 UTC
Prepared by the NOAA © SWPC and processed by

Joint USAF/NOAA Solar and Geophysical Activity Summary

SGAS Number 116 Issued at 0245Z on 26 Apr 2002 This report is compiled from data received at SWO on 25 Apr
A. Energetic Events
Begin  Max  End  Rgn   Loc   Xray  Op 245MHz 10cm   Sweep
0353 0353 0354                       100
0554 0602 0605  9912 N10W56 C2.5  Sf 1200
0906 0906 0906                       230
1044 1044 1044                       290
1851 1851 1851                       140
2122 2122 2123                       120
B. Proton Events
The greater than 10 MeV proton event that began at 21/0225 UTC persisted, but just barely above event threshold (the maximum for this event was 2520 pfu at 21/2320 UTC).
C. Geomagnetic Activity Summary
Geomagnetic field activity was at mostly quiet levels.
D. Stratwarm
E. Daily Indices: (real-time preliminary/estimated values)
10 cm 167  SSN 208  Afr/Ap 003/005   X-ray Background B5.9
Daily Proton Fluence (flux accumulation over 24 hrs)
GT 1 MeV 3.3e+06   GT 10 MeV 1.2e+06 p/(cm2-ster-day)
(GOES-8 satellite synchronous orbit W75 degrees)
Daily Electron Fluence
GT 2 MeV 1.40e+06 e/(cm2-ster-day)
(GOES-8 satellite synchronous orbit W75 degrees)
3 Hour K-indices
Boulder 2 1 0 1 2 2 1 0 Planetary 2 1 0 2 2 3 2 1
F. Comments
  Afr estimated based on Boulder USGS magnetometer data.

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