Viewing archive of Sunday, 21 October 2001

Geophysical report

Solar and Geophysical Activity Summary 2001 Oct 21 0245 UTC
Prepared by the NOAA © SWPC and processed by

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 Oct
A. 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
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
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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