Viewing archive of Saturday, 21 September 2002

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 2002 Sep 21 0245 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Solar and Geophysical Activity Summary

SGAS Number 264 Issued at 0245Z on 21 Sep 2002 This report is compiled from data received at SWO on 20 Sep
A. Energetic Events
Begin  Max  End  Rgn   Loc   Xray  Op 245MHz 10cm   Sweep
0233 0234 0234                       130
0508 0512 0517  0126 S24E75 M1.5  Sf
0656 0656 0656                       330
0756 0758 0759                       800
0808 0811 0812                       720
0816 0816 0817                       310
0921 0928 0933  0126 S24E73 M1.8  Sf        53        IV
1057 1058 1058                       170
1204 1204 1204                       990
1237 1239 1240                       340
B. Proton Events
None
C. Geomagnetic Activity Summary
The geomagnetic field was quiet to unsettled. Solar wind speed began the period near 700 km/s following the arrival of a CME earlier yesterday. However, a weak IMF with sustained northward Bz offset any significant impact on the geomagnetic field.
D. Stratwarm
None
E. Daily Indices: (real-time preliminary/estimated values)
10 cm 164  SSN 237  Afr/Ap 005/006   X-ray Background B8.2
Daily Proton Fluence (flux accumulation over 24 hrs)
GT 1 MeV 6.2e+05   GT 10 MeV 1.1e+04 p/(cm2-ster-day)
(GOES-8 satellite synchronous orbit W75 degrees)
Daily Electron Fluence
GT 2 MeV 2.60e+07 e/(cm2-ster-day)
(GOES-8 satellite synchronous orbit W75 degrees)
3 Hour K-indices
Boulder 2 2 1 1 1 1 1 2 Planetary 3 2 1 1 2 2 3 2
F. Comments
  None

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