Viewing archive of Wednesday, 23 April 2003

Geophysical report

Solar and Geophysical Activity Summary 2003 Apr 23 0245 UTC
Prepared by the NOAA © SWPC and processed by

Joint USAF/NOAA Solar and Geophysical Activity Summary

SGAS Number 113 Issued at 0245Z on 23 Apr 2003 This report is compiled from data received at SWO on 22 Apr
A. Energetic Events
Begin  Max  End  Rgn   Loc   Xray  Op 245MHz 10cm   Sweep
0719 0719 0719                       76            II
1613 1617 1622  0338 N20W17 C2.2  Sf 140    50
1941 2011 2037  0338 N20W14 C4.0  Sf 7500             IV
B. Proton Events
C. Geomagnetic Activity Summary
The geomagnetic field was unsettled to active. A high speed solar wind stream that began early on 21 April continues. Solar wind speeds exceeded 600 km/s early in the period, but gradually declined to below 550 km/s by the end of the period.
D. Stratwarm
E. Daily Indices: (real-time preliminary/estimated values)
10 cm 132  SSN 147  Afr/Ap 019/022   X-ray Background B4.7
Daily Proton Fluence (flux accumulation over 24 hrs)
GT 1 MeV 2.1e+06   GT 10 MeV 1.6e+04 p/(cm2-ster-day)
(GOES-10 satellite synchronous orbit W135 degrees)
Daily Electron Fluence
GT 2 MeV 3.30e+08 e/(cm2-ster-day)
(GOES-10 satellite synchronous orbit W135 degrees)
3 Hour K-indices
Boulder 4 4 4 3 3 3 3 3 Planetary 4 4 4 4 3 3 3 4
F. Comments
  The greater than 2 MeV electrons at geosynchronous
orbit reached high levels again today.

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