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 UTCPrepared 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 SepA. 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.
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