Viewing archive of Sunday, 25 November 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 Nov 25 0245 UTC
Prepared by the NOAA © SWPC and processed by

Joint USAF/NOAA Solar and Geophysical Activity Summary

SGAS Number 329 Issued at 0245Z on 25 Nov 2001 This report is compiled from data received at SWO on 24 Nov
A. Energetic Events
Begin  Max  End  Rgn   Loc   Xray  Op 245MHz 10cm   Sweep
2115 2117 2123  9704 S18W58       Sf 110
B. Proton Events
Today's interplanetary shock passages enhanced the already high 10 MeV proton integral flux to a peak value of 18900 pfu at 24/0555 UTC. By the end of the day, the event remained in progress with a flux value of about 190 pfu. The 100 MeV proton event ended at 24/1200 UTC. Max flux observed was 4.6 pfu at 24/0225 UTC.
C. Geomagnetic Activity Summary
Geomagnetic field activity ranged from quiet to severe storm levels. The onset of storm conditions began with two sudden impulse observations: 20nt at 24/0500 UTC, followed by 80nt at 24/0555 UTC. Severe storm conditions were evident in planetary K-index values during 24/0600-1800 UTC. This event is the likely result of interaction among up to three interplanetary shock propagations from separate CME events during 21-23 November, indicated by re-analysis of shock arrival model predictions with improved event velocity data. Results suggest that the CMEs may have merged into the single interplanetary shock that passed the earth today.
D. Stratwarm
E. Daily Indices: (real-time preliminary/estimated values)
10 cm 173  SSN 124  Afr/Ap 095/108   X-ray Background B9.0
Daily Proton Fluence (flux accumulation over 24 hrs)
GT 1 MeV 2.3e+09   GT 10 MeV 3.8e+08 p/(cm2-ster-day)
(GOES-8 satellite synchronous orbit W75 degrees)
Daily Electron Fluence
GT 2 MeV 2.90e+08 e/(cm2-ster-day)
(GOES-8 satellite synchronous orbit W75 degrees)
3 Hour K-indices
Boulder 3 5 9 6 7 5 2 4 Planetary 3 5 9 7 8 7 3 4
F. Comments
  Afr estimated from Boulder A.

All times in UTC

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