Viewing archive of Sunday, 21 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 21 0245 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Solar and Geophysical Activity Summary
SGAS Number 294 Issued at 0245Z on 21 Oct 2001 This report is compiled from data received at SWO on 20 OctA. Energetic Events
Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 0622 0622 0622 380 2107 2112 2115 9674 S09E24 C4.6 Sf 430 2233 2238 2241 9674 S09E24 C2.5 Sf 200
B. Proton Events
None
C. Geomagnetic Activity Summary
The geomagnetic field was
predominantly at quiet to unsettled levels. Brief active conditions
were observed at both the middle and high latitudes in the
20/1200-1500 UTC period. The greater than 10 MeV proton flux at
geosynchronous orbit passed the 10 pfu threshold at 19/2225 UTC,
reached a maximum of 11 pfu at 19/2235 UTC. The short lived 10 MeV
proton event ended at 19/2255 UTC though flux levels remained
elevated at time of bulletin issue.
D. Stratwarm
None
E. Daily Indices: (real-time preliminary/estimated values)
10 cm 245 SSN 230 Afr/Ap 013/010 X-ray Background C2.4 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 1.1e+07 GT 10 MeV 4.5e+05 p/(cm2-ster-day) (GOES-8 satellite synchronous orbit W75 degrees) Daily Electron Fluence GT 2 MeV 6.20e+05 e/(cm2-ster-day) (GOES-8 satellite synchronous orbit W75 degrees) 3 Hour K-indices Boulder 2 3 3 4 3 3 2 2 Planetary 1 3 2 4 3 3 2 2
F. Comments
Afr is based on Boulder A-Indices
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