Viewing archive of Sunday, 25 August 2002

Geophysical report

Solar and Geophysical Activity Summary 2002 Aug 25 0245 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Solar and Geophysical Activity Summary

SGAS Number 237 Issued at 0245Z on 25 Aug 2002 This report is compiled from data received at SWO on 24 Aug
A. Energetic Events
Begin  Max  End  Rgn   Loc   Xray  Op 245MHz 10cm   Sweep
0049 0112 0131  0069 S02W81 X3.1  1f 280    1200   II/IV
0538 0548 0559  0087 S09E52 M1.8  1n 340    73        IV
0925 0928 0938  0085 S06E07       Sf 220
1112 1128 1141              M1.5
1302 0000 0115                                        IV
1706 1706 1706                       120
2210 2210 2210                       140
2338 2339 2339                       160
2342 2343 2343                       180
B. Proton Events
A greater than 100 MeV proton event began at 24/0130 UTC, reached a 29 pfu peak at 24/0210 UTC, and dropped below the 1 pfu event threshold at 24/1825 UTC. A greater than 10 MeV proton event began at 24/0140 UTC, reached a 317 pfu peak at 24/0835 UTC, and remains in progress.
C. Geomagnetic Activity Summary
The geomagnetic field was quiet to unsettled.
D. Stratwarm
None
E. Daily Indices: (real-time preliminary/estimated values)
10 cm 196  SSN 199  Afr/Ap 006/011   X-ray Background C3.0
Daily Proton Fluence (flux accumulation over 24 hrs)
GT 1 MeV 4.7e+07   GT 10 MeV 1.7e+07 p/(cm2-ster-day)
(GOES-8 satellite synchronous orbit W75 degrees)
Daily Electron Fluence
GT 2 MeV 1.90e+07 e/(cm2-ster-day)
(GOES-8 satellite synchronous orbit W75 degrees)
3 Hour K-indices
Boulder 3 1 1 2 3 2 1 2 Planetary 3 2 2 2 3 3 3 3
F. Comments
  The Afr index reported in Part E is estimated from
Boulder observations.

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