Viewing archive of Friday, 20 September 2002
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 2002 Sep 20 0245 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Solar and Geophysical Activity Summary
SGAS Number 263 Issued at 0245Z on 20 Sep 2002 This report is compiled from data received at SWO on 19 SepA. Energetic Events
Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 0356 0356 0357 130 0512 0528 0548 0125 S07E63 C4.7 1f II 1708 1709 1713 150 2026 2026 2026 240 2240 2241 2241 150 2251 2251 2252 130 2334 2334 2334 120
B. Proton Events
None
C. Geomagnetic Activity Summary
The geomagnetic field ranged from
quiet to minor storm levels. A weak shock was observed at the ACE
spacecraft just before 19/0600Z. Solar wind speed gradually
increased to over 750 km/s by late in the period, but total magnetic
field measurements and densities remained very low. This disturbance
is likely associated with the C8 flare and CME observed on 17
September
D. Stratwarm
None
E. Daily Indices: (real-time preliminary/estimated values)
10 cm 165 SSN 206 Afr/Ap 016/013 X-ray Background B6.4 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 3.6e+05 GT 10 MeV 1.1e+04 p/(cm2-ster-day) (GOES-8 satellite synchronous orbit W75 degrees) Daily Electron Fluence GT 2 MeV 2.90e+07 e/(cm2-ster-day) (GOES-8 satellite synchronous orbit W75 degrees) 3 Hour K-indices Boulder 3 1 2 2 4 5 2 3 Planetary 3 2 1 2 4 4 3 3
F. Comments
None
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