Viewing archive of Monday, 26 July 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.
:Product: 20040726SGAS.txt
:Issued: 2004 Jul 26 0250 UT
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.comJoint USAF/NOAA Solar and Geophysical Activity Summary
SGAS Number 208 Issued at 0245Z on 26 Jul 2004 This report is compiled from data received at SWO on 25 JulA. Energetic Events
Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 0025 0032 0036 0652 N09W26 C7.4 Sf 200 0539 0551 0558 0652 N10W31 M7.1 2b 81 810 IV 0630 0639 0645 0652 N03W27 M1.0 1f 34 1231 1233 1234 130 1318 1325 1332 0652 C2.1 150 1337 1349 1355 0652 M2.2 620 65 1419 1514 1643 0652 N08W33 M1.1 1f 2100 120 IV 1521 0000 1526 II 1638 1639 1646 170 1956 1957 1957 220 63
B. Proton Events
A greater than 10 MeV proton event accompanied
the long duration M1 flare and CME that occurred at 25/1514Z. The
proton event began at 25/1855Z and remains in progress. The peak so
far was 55 pfu at 25/2305Z.
C. Geomagnetic Activity Summary
The geomagnetic field was at
active to severe storm levels. The shock observed at the ACE
spacecraft on 24/0600Z was followed by a prolonged period of
southward IMF Bz that lasted through midway on 25 July. Bz ranged
from -10 to -20 nT for much of this period, while solar wind speed
was elevated in the 550 to 700 km/s range. Consequently, severe
geomagnetic storm levels were observed at all latitudes. It is
likely that this activity was associated with the complex series of
CMEs observed on 22 July. Late in this period, a discontinuity in
the solar wind suggested that transient flow from the multiple CME
activity on 23 July had arrived.
D. Stratwarm
None
E. Daily Indices: (real-time preliminary/estimated values)
10 cm 145 SSN 130 Afr/Ap 091/122 X-ray Background B7.2 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 1.9e+07 GT 10 MeV 5.9e+05 p/(cm2-ster-day) (GOES-11 satellite synchronous orbit W97 degrees) Daily Electron Fluence GT 2 MeV 9.30e+07 e/(cm2-ster-day) (GOES-12 satellite synchronous orbit W75 degrees) 3 Hour K-indices Boulder 5 6 6 7 6 7 6 6 Planetary 6 7 7 8 6 7 6 7
F. Comments
None
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