Viewing archive of Thursday, 20 February 2003
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 2003 Feb 20 0245 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Solar and Geophysical Activity Summary
SGAS Number 051 Issued at 0245Z on 20 Feb 2003 This report is compiled from data received at SWO on 19 FebA. Energetic Events
Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 2251 2310 2337 100
B. Proton Events
None
C. Geomagnetic Activity Summary
The geomagnetic field was at quiet
to unsettled levels. The transient effects that began yesterday,
and produced a structured solar wind, appear to be ending. At
19/1400 UTC, the steady decline in solar wind velocity reached a
minimum near 500 km/s. Solar wind velocity has since increased to
560 km/s. Bz show signs of returning to the fluctuating signature
of a high speed stream.
D. Stratwarm
STRATWARM ALERT/WEDNESDAY/STRATWARM EXISTS.
The wave two pattern persists with a continuing reversed temperature
gradient on all levels and easterly winds on 3 and 5 hpa.
E. Daily Indices: (real-time preliminary/estimated values)
10 cm 116 SSN 057 Afr/Ap 012/012 X-ray Background B1.9 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 4.7e+05 GT 10 MeV 1.1e+04 p/(cm2-ster-day) (GOES-8 satellite synchronous orbit W75 degrees) Daily Electron Fluence GT 2 MeV 5.30e+06 e/(cm2-ster-day) (GOES-8 satellite synchronous orbit W75 degrees) 3 Hour K-indices Boulder 2 3 3 2 3 3 2 3 Planetary 3 3 3 2 3 3 3 3
F. Comments
None
All times in UTC
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