Viewing archive of Wednesday, 4 April 2001

Geophysical report

Solar and Geophysical Activity Summary 2001 Apr 04 0245 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Solar and Geophysical Activity Summary

SGAS Number 094 Issued at 0245Z on 04 Apr 2001 This report is compiled from data received at SWO on 03 Apr
A. Energetic Events
Begin  Max  End  Rgn   Loc   Xray  Op 245MHz 10cm   Sweep
0325 0357 0455  9415 S21E83 X1.2  1n 470    3300      IV
1229 1234 1238  9393 N15W88 M2.4  2f        31
1952 1955 1957                       130
2004 2005 2006                       110
2317 2351 0004              M1.1
B. Proton Events
An energetic proton event resulted from the X20 flare. Greater than 20 MeV particles exceeded event threshold at 02/2340Z, and reached a maximum of 1,110 PFU at 03/0745Z. The 10 MeV particle event continues in progress but is slowly decreasing. Greater than 100 MeV particles also exceeded event threshold, beginning at 03/0120Z, reaching a maximum of 5.4 PFU at 03/0740Z. The greater than 100 MeV particles decreased to event threshold after 03/1900Z.
C. Geomagnetic Activity Summary
The geomagnetic field was quiet to unsettled.
D. Stratwarm
None
E. Daily Indices: (real-time preliminary/estimated values)
10 cm 223  SSN 228  Afr/Ap 005/005   X-ray Background M2.0
Daily Proton Fluence (flux accumulation over 24 hrs)
GT 1 MeV 8.2e+07   GT 10 MeV 3.3e+07 p/(cm2-ster-day)
(GOES-8 satellite synchronous orbit W75 degrees)
Daily Electron Fluence
GT 2 MeV 1.00e+07 e/(cm2-ster-day)
(GOES-8 satellite synchronous orbit W75 degrees)
3 Hour K-indices
Boulder 2 1 1 0 3 3 2 2 Planetary 2 1 1 1 2 3 2 2
F. Comments
  None

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