Viewing archive of Friday, 17 August 2001

Geophysical report

Solar and Geophysical Activity Summary 2001 Aug 17 0245 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Solar and Geophysical Activity Summary

SGAS Number 229 Issued at 0245Z on 17 Aug 2001 This report is compiled from data received at SWO on 16 Aug
A. Energetic Events
Begin  Max  End  Rgn   Loc   Xray  Op 245MHz 10cm   Sweep
None
B. Proton Events
A major proton event for >= 100MeV protons above 1pfu began at 16/0105 UTC, followed by >= 10Mev protons above 10pfu at 16/0135 UTC. Maximum flux for 100Mev protons was 29pfu at 16/0305 UTC, and for 10MeV protons was 493pfu at 16/0355 UTC. Both events remain in progress.
C. Geomagnetic Activity Summary
Geomagnetic field activity has been quiet to unsettled throughout the period. Greater than 2MeV electrons were observed at moderate enhancement levels again today, although the electron sensor on GOES-8 was saturated by the proton event for much of the period.
D. Stratwarm
None
E. Daily Indices: (real-time preliminary/estimated values)
10 cm 143  SSN 171  Afr/Ap 005/008   X-ray Background B3.9
Daily Proton Fluence (flux accumulation over 24 hrs)
GT 1 MeV 2.1e+07   GT 10 MeV 1.4e+07 p/(cm2-ster-day)
(GOES-8 satellite synchronous orbit W75 degrees)
Daily Electron Fluence
GT 2 MeV 9.00e+06 e/(cm2-ster-day)
(GOES-8 satellite synchronous orbit W75 degrees)
3 Hour K-indices
Boulder 1 1 0 1 2 3 2 2 Planetary 2 1 0 2 3 3 3 2
F. Comments
  Afr estimated from Boulder A

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