Viewing archive of Friday, 13 April 2001

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 2001 Apr 13 0245 UTC
Prepared by the NOAA © SWPC and processed by

Joint USAF/NOAA Solar and Geophysical Activity Summary

SGAS Number 103 Issued at 0245Z on 13 Apr 2001 This report is compiled from data received at SWO on 12 Apr
A. Energetic Events
Begin  Max  End  Rgn   Loc   Xray  Op 245MHz 10cm   Sweep
0256 0304 0329  9415 S22W38 M1.3  1n
0840 0841 0841                       120
0939 1028 1049  9415 S19W43 X2.0  Sf 8200   1200   II/IV
1145 1146 1159                       130
1210 1216 1232                       100
1956 1956 1957                       160
B. Proton Events
The greater than 10 MeV proton event that began at 0850 UTC on 10 April continues in progress. The maximum was 355 PFU at 11/2055 UTC and the flux at the end of the day on 12 April was 31 PFU. A greater than 100 MeV proton event began at 12/1305 UTC, attained maximum of 1.5 PFU at 12/1725 UTC, and ended at 12/2010 UTC.
C. Geomagnetic Activity Summary
The geomagnetic field ranged from quiet to severe storm levels.
D. Stratwarm
E. Daily Indices: (real-time preliminary/estimated values)
10 cm 149  SSN 159  Afr/Ap 045/038   X-ray Background B8.1
Daily Proton Fluence (flux accumulation over 24 hrs)
GT 1 MeV 1.0e+08   GT 10 MeV 4.3e+06 p/(cm2-ster-day)
(GOES-8 satellite synchronous orbit W75 degrees)
Daily Electron Fluence
GT 2 MeV 5.60e+06 e/(cm2-ster-day)
(GOES-8 satellite synchronous orbit W75 degrees)
3 Hour K-indices
Boulder 7 5 5 3 3 3 2 1 Planetary 7 6 5 5 3 3 1 2
F. Comments

All times in UTC

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