Viewing archive of Thursday, 15 September 2005
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 2005 Sep 15 0248 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Solar and Geophysical Activity Summary
SGAS Number 258 Issued at 0245Z on 15 Sep 2005 This report is compiled from data received at SWO on 14 SepA. Energetic Events
Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 0000 0000 0000 IV 0448 0000 1641 IV 1005 1038 1054 M4.6 170 188 IV 1635 0000 0421 IV 2315 2322 2330 0808 X1.7 180
B. Proton Events
The greater than 10 MeV proton flux crossed the
10 pfu event threshold at 14/0040 UTC in response to an influx of
energetic particles from the recent X1 flares late on 13 September.
This new proton enhancement reached a maximum of 183 pfu at 14/1520
UTC before declining to around 35 pfu by 14/2140 UTC; it has since
increased to near 100 pfu by the end of the period.
C. Geomagnetic Activity Summary
The geomagnetic field was at quiet
to minor storm levels. Minor storm conditions were the result of
elevated solar wind speeds and long periods of southward Bz in the
IMF.
D. Stratwarm
Not available
E. Daily Indices: (real-time preliminary/estimated values)
10 cm 117 SSN 086 Afr/Ap 018/025 X-ray Background B5.2 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 8.4e+07 GT 10 MeV 8.5e+06 p/(cm2-ster-day) (GOES-11 satellite synchronous orbit W113 degrees) Daily Electron Fluence GT 2 MeV 9.80e+08 e/(cm2-ster-day) (GOES-12 satellite synchronous orbit W74 degrees) 3 Hour K-indices Boulder 3 3 5 4 4 3 3 3 Planetary 3 3 5 5 5 3 3 2
F. Comments
The greater than 2 MeV electron fluence at geosynchronous orbit reached high levels today.
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