Viewing archive of Sunday, 30 September 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 Sep 30 0245 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Solar and Geophysical Activity Summary

SGAS Number 273 Issued at 0245Z on 30 Sep 2001 This report is compiled from data received at SWO on 29 Sep
A. Energetic Events
Begin  Max  End  Rgn   Loc   Xray  Op 245MHz 10cm   Sweep
0000 0000 0043                                        IV
1019 1106 1148  9636 N13E03 M1.8  1f 32
1250 1301 1303                       420
1334 1334 1334                       1300
1529 1529 1530                       1000
1955 1955 1955                       100
B. Proton Events
The greater than 10MeV proton event which began on 25 September remains in progress. Peak flux was 12900 pfu at 25/2235 UTC. Current flux levels (at 29/2400 UTC) are about 22 pfu.
C. Geomagnetic Activity Summary
Geomagnetic field activity was quiet to minor storm. A 17 nT sudden impulse was observed on the Boulder magnetometer at 29/0940 UTC, preceded by an earlier shock passage observed on the ACE satellite. Several active periods and an isolated minor storm period occurred through the remainder of the day. Solar wind speed remains elevated and IMF signatures suggest the predominant influence of a coronal hole high speed stream.
D. Stratwarm
None
E. Daily Indices: (real-time preliminary/estimated values)
10 cm 240  SSN 233  Afr/Ap ???/021   X-ray Background C2.9
Daily Proton Fluence (flux accumulation over 24 hrs)
GT 1 MeV 6.1e+07   GT 10 MeV 4.3e+06 p/(cm2-ster-day)
(GOES-8 satellite synchronous orbit W75 degrees)
Daily Electron Fluence
GT 2 MeV 9.50e+06 e/(cm2-ster-day)
(GOES-8 satellite synchronous orbit W75 degrees)
3 Hour K-indices
Boulder 3 3 2 4 2 4 4 5 Planetary 3 3 3 4 3 4 3 5
F. Comments
  Afr estimated from Boulder A.  Type IV event reported
in Section A above began at 28/1753 UTC, in association with an
optical flare from Region 9628 (S17W48) at that time.

All times in UTC

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