Viewing archive of Tuesday, 27 August 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 Aug 27 0245 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Solar and Geophysical Activity Summary
SGAS Number 239 Issued at 0245Z on 27 Aug 2002 This report is compiled from data received at SWO on 26 AugA. Energetic Events
Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 0039 0103 0125 0083 S19W45 M1.8 Sf 100 1936 2011 2029 0083 S18W56 C7.8 Sf 240
B. Proton Events
The greater than 10 MeV proton event ended at
26/1335 UTC ( start at 24/0140 UTC and 317 pfu peak at 24/0835 UTC).
C. Geomagnetic Activity Summary
The geomagnetic field ranged from
quiet to major storm levels. A shock in the solar wind was observed
by the NASA ACE spacecraft at 26/1048 UTC. The most active 3-hour
geomagnetic period was 26/1500 to 1800 UTC. This activity is
believed to be related to the M5 flare/CME event which occurred on
22 August.
D. Stratwarm
None
E. Daily Indices: (real-time preliminary/estimated values)
10 cm 169 SSN 105 Afr/Ap 016/018 X-ray Background C3.5 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 3.0e+07 GT 10 MeV 9.1e+05 p/(cm2-ster-day) (GOES-8 satellite synchronous orbit W75 degrees) Daily Electron Fluence GT 2 MeV 6.20e+06 e/(cm2-ster-day) (GOES-8 satellite synchronous orbit W75 degrees) 3 Hour K-indices Boulder 2 2 2 3 4 6 3 3 Planetary 3 3 2 3 4 5 3 3
F. Comments
The Afr index reported in Part E is estimated from Boulder observations.
All times in UTC
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