Viewing archive of Tuesday, 2 October 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 Oct 02 0245 UTC
Prepared by the NOAA © SWPC and processed by

Joint USAF/NOAA Solar and Geophysical Activity Summary

SGAS Number 275 Issued at 0245Z on 02 Oct 2001 This report is compiled from data received at SWO on 01 Oct
A. Energetic Events
Begin  Max  End  Rgn   Loc   Xray  Op 245MHz 10cm   Sweep
0441 0515 0523              M9.1            69
0633 0639 0644  9628 S29W76       Sf 450    22
1313 1314 1315                       160
2340 2345 2351  9632 S16W86 M1.2  Sf
B. Proton Events
The greater than 10 MeV proton flux hovered around event threshold (10 pfu) during the first half of the day, then began a sustained rise at around 01/1145 UTC. This proton event was in progress as the period ended with a preliminary maximum flux of 677 pfu detected at 01/2230 UTC.
C. Geomagnetic Activity Summary
Field activity ranged from unsettled to major storm levels due to CME passages.
D. Stratwarm
E. Daily Indices: (real-time preliminary/estimated values)
10 cm 217  SSN 289  Afr/Ap 037/050   X-ray Background C1.6
Daily Proton Fluence (flux accumulation over 24 hrs)
GT 1 MeV 4.6e+07   GT 10 MeV 1.1e+07 p/(cm2-ster-day)
(GOES-8 satellite synchronous orbit W75 degrees)
Daily Electron Fluence
GT 2 MeV 5.80e+05 e/(cm2-ster-day)
(GOES-8 satellite synchronous orbit W75 degrees)
3 Hour K-indices
Boulder 4 3 6 5 5 3 3 5 Planetary 4 5 6 6 5 4 3 5
F. Comments

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