Viewing archive of Sunday, 1 April 2001

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 2001 Apr 01 0245 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Solar and Geophysical Activity Summary

SGAS Number 091 Issued at 0245Z on 01 Apr 2001 This report is compiled from data received at SWO on 31 Mar
A. Energetic Events
Begin  Max  End  Rgn   Loc   Xray  Op 245MHz 10cm   Sweep
0002 0005 0013  9393 N19W20       Sf 300
0845 0845 0846                       3100
1100 1112 1131  9393 N16W34 M2.1  Sf        100
1654 1654 1654                       200
2048 2049 2051                       540
B. Proton Events
None
C. Geomagnetic Activity Summary
The geomagnetic field has been at severe storm levels. A shock passed the ACE spacecraft at 31/0023 UT and subsequently reached Earth's magnetic field at 31/0051. The storm developed after that time and reached maximum intensity after 31/0900 UT. It has continued into the later hours of the UT days. Dynamic auroral displays were reported across the United States with especially dynamic displays reported in Arizona, west Texas and California. The solar proton event that began at 29/1000 UT was declared over at 01/0600 UT.
D. Stratwarm
None
E. Daily Indices: (real-time preliminary/estimated values)
10 cm 246  SSN 326  Afr/Ap 131/155   X-ray Background C2.8
Daily Proton Fluence (flux accumulation over 24 hrs)
GT 1 MeV 6.8e+07   GT 10 MeV 6.9e+05 p/(cm2-ster-day)
(GOES-8 satellite synchronous orbit W75 degrees)
Daily Electron Fluence
GT 2 MeV 1.10e+06 e/(cm2-ster-day)
(GOES-8 satellite synchronous orbit W75 degrees)
3 Hour K-indices
Boulder 6 7 9 6 6 6 7 5 Planetary 6 8 9 6 7 7 8 6
F. Comments
  None

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