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 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
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 NovA. 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
None
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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