Viewing archive of Monday, 12 April 2004
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 2004 Apr 12 0245 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Solar and Geophysical Activity Summary
SGAS Number 103 Issued at 0245Z on 12 Apr 2004 This report is compiled from data received at SWO on 11 AprA. Energetic Events
Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 0354 0419 0435 0588 S14W47 C9.6 1f 110 920 1950 1950 1950 1400 2121 2122 2123 670
B. Proton Events
A greater than 10 MeV proton event began at
11/1135Z. The peak so far has been 35 pfu at 11/1845Z. The event was
in decline by the end of the period. This proton event is likely
associated with the C9 flare at 11/0419Z.
C. Geomagnetic Activity Summary
The geomagnetic field was quiet to
unsettled. Solar wind speed began the period at elevated levels
(over 500 km/s) following yesterday's CME arrival at 10/1925Z.
However, IMF Bz stayed predominantly northward and as a result, the
geomagnetic disturbance was weak.
D. Stratwarm
None
E. Daily Indices: (real-time preliminary/estimated values)
10 cm 090 SSN 016 Afr/Ap 010/008 X-ray Background A6.5 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 1.8e+07 GT 10 MeV 1.0e+06 p/(cm2-ster-day) (GOES-11 satellite synchronous orbit W98 degrees) Daily Electron Fluence GT 2 MeV 2.50e+07 e/(cm2-ster-day) (GOES-12 satellite synchronous orbit W75 degrees) 3 Hour K-indices Boulder 3 2 3 1 2 3 2 3 Planetary 3 2 3 2 2 2 2 2
F. Comments
None
All times in UTC
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