Viewing archive of Sunday, 18 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 18 0245 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Solar and Geophysical Activity Summary
SGAS Number 230 Issued at 0245Z on 18 Aug 2002 This report is compiled from data received at SWO on 17 AugA. Energetic Events
Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 0058 0108 0114 0083 S19E77 M1.1 Sf 2039 2051 2057 0069 S06W05 M3.4 Sf 2304 0000 0000 IV 2323 2323 2323 190
B. Proton Events
None
C. Geomagnetic Activity Summary
The geomagnetic field was at quiet
to unsettled condition with one three-hour period of isolated active
levels at 17/0900 UTC. Greater than 2 MeV electron flux at
geosynchronous orbit exceeded event threshold at 17/1405 UTC,
reached a peak value of 1350 pfu at 17/1710 UTC and decreased below
threshold levels at 17/1845 UTC. NASA/ACE data indicates that the
solar wind velocities decreased throughout the day from a peak
velocity of 600 km/s to around 450 km/s due to waning coronal hole
effects.
D. Stratwarm
None
E. Daily Indices: (real-time preliminary/estimated values)
10 cm 227 SSN 270 Afr/Ap 011/013 X-ray Background C1.9 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 7.7e+06 GT 10 MeV 2.4e+05 p/(cm2-ster-day) (GOES-8 satellite synchronous orbit W75 degrees) Daily Electron Fluence GT 2 MeV 5.30e+07 e/(cm2-ster-day) (GOES-8 satellite synchronous orbit W75 degrees) 3 Hour K-indices Boulder 2 3 4 2 2 2 2 3 Planetary 2 3 4 3 2 2 3 3
F. Comments
None
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