Viewing archive of Saturday, 18 August 2001

Geophysical report

Solar and Geophysical Activity Summary 2001 Aug 18 0245 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Solar and Geophysical Activity Summary

SGAS Number 230 Issued at 0245Z on 18 Aug 2001 This report is compiled from data received at SWO on 17 Aug
A. Energetic Events
Begin  Max  End  Rgn   Loc   Xray  Op 245MHz 10cm   Sweep
0547 0547 0547                       120
B. Proton Events
The greater than 100 MeV proton event has ended (start 16/0105 UTC, 29 pfu peak at 16/0305 UTC, and end 17/1415 UTC). The greater than 10 MeV proton event remains in progress (start 16/0135 UTC, 493 pfu peak at 16/0355 UTC, and current flux of 17 pfu at 18/0000 UTC).
C. Geomagnetic Activity Summary
The geomagnetic field ranged from quiet to major storm levels following a Sudden Impulse observed on ground magnetometers (36 nT at Boulder) at 17/1103 UTC.
D. Stratwarm
None
E. Daily Indices: (real-time preliminary/estimated values)
10 cm 145  SSN 158  Afr/Ap 030/029   X-ray Background B4.3
Daily Proton Fluence (flux accumulation over 24 hrs)
GT 1 MeV 2.8e+07   GT 10 MeV 5.9e+06 p/(cm2-ster-day)
(GOES-8 satellite synchronous orbit W75 degrees)
Daily Electron Fluence
GT 2 MeV 3.60e+06 e/(cm2-ster-day)
(GOES-8 satellite synchronous orbit W75 degrees)
3 Hour K-indices
Boulder 2 1 1 4 4 5 5 6 Planetary 1 1 2 4 5 5 6 5
F. Comments
  None

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