Viewing archive of Wednesday, 9 April 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 Apr 09 0245 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Solar and Geophysical Activity Summary
SGAS Number 099 Issued at 0245Z on 09 Apr 2003 This report is compiled from data received at SWO on 08 AprA. Energetic Events
Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 0723 0724 0724 100 1329 1329 1329 110
B. Proton Events
None
C. Geomagnetic Activity Summary
The geomagnetic field was at quiet
to active levels. A CME shock from the M1 event on 04 April arrived
early today with a 33 nT sudden impulse at 08/0115Z recorded on the
Boulder magnetometer. Bz reached values near minus 10 nT and solar
wind velocity reached peak values near 500 km/s. Unsettled to
active levels were observed at mid latitudes and an isolated minor
storm condition on the planetary index.
D. Stratwarm
None
E. Daily Indices: (real-time preliminary/estimated values)
10 cm 112 SSN 052 Afr/Ap 018/020 X-ray Background B1.9 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 6.0e+06 GT 10 MeV 2.2e+04 p/(cm2-ster-day) (GOES-10 satellite synchronous orbit W135 degrees) Daily Electron Fluence GT 2 MeV 1.40e+07 e/(cm2-ster-day) (GOES-10 satellite synchronous orbit W135 degrees) 3 Hour K-indices Boulder 3 3 4 4 3 4 2 3 Planetary 2 3 4 5 4 4 2 3
F. Comments
Beginning 1500 UTC April 8, SEC will begin using data from the GOES 12 satellite, and stop receiving GOES 8 data. GOES 12 has the new Solar X-Ray Imager (SXI), which will acquire real-time, operational images of the solar x-ray flux. With the switch from GOES 8 to GOES 12, the primary/secondary designations will change. GOES 12 will be the primary satellite for the SXI. All other data, including magnetometer, XRS x-ray measurements, and energetic particles, will have GOES 10 as their primary source, with GOES 12 as the secondary source where available. Please see http://www.sec.noaa.gov/GOES.html for important information on this changeover.
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