Viewing archive of Sunday, 30 December 2001
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 2001 Dec 30 0245 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Solar and Geophysical Activity Summary
SGAS Number 364 Issued at 0245Z on 30 Dec 2001 This report is compiled from data received at SWO on 29 DecA. Energetic Events
Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 0404 0411 0423 M2.1 0540 0545 0550 9751 N02W32 M1.1 1f 0905 0916 0928 M1.8 0938 0945 1006 9748 S07W85 M9.3 Sf 8000 100 II/IV 1152 1157 1204 S26E87 M1.4 Sf 1633 1647 1702 M3.3 1834 1834 1834 150 1950 2127 2355 M1.8 2251 2256 2308 9767 S24E88 M2.8 1f
B. Proton Events
The 10 MeV integral proton flux at geosynchronous
orbit followed a slow rising trend shortly after the end of the east
limb X-flare of 28 December. Flux exceeded event threshold at
29/0510 UTC. Further enhancement in possible association with the
shock passage (described in Part C below) resulted in a peak flux
observation of 76 pfu at 29/0815 UTC. The event ended at 29/2300
UTC.
C. Geomagnetic Activity Summary
The geomagnetic field was quiet to
active. An L1 shock passage was observed at approximately 29/0440
UTC, and followed by a sudden impulse of 44 nT at 29/0538 UTC.
Predominantly northward IMF orientation following the shock passage
mostly mitigated the potential geomagnetic response to this event,
presumed to have originated from the CME activity of 26 December.
D. Stratwarm
STRATWARM ALERT EXISTS STRATWARM SATURDAY
WARM AIR COVERS MOST OF THE POLAR REGION IN THE UPPER AND MIDDLE
STRATOSPHERE, FURTHER PENETRATING DOWNWARDS. THE TEMPERATURE
GRADIENT BETWEEN 60N AND THE POLE WILL BE REVERSED DOWN TO 50
HPA, AND MEAN ZONAL EASTERLY WINDS ARE EXPECTED BETWEEN 10
AND 2 HPA AT 60N. MAJOR WARMING IN PROGRESS.
E. Daily Indices: (real-time preliminary/estimated values)
10 cm 264 SSN 222 Afr/Ap 013/010 X-ray Background M1.6 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 3.0e+07 GT 10 MeV 1.6e+06 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 4 2 2 2 4 2 3 Planetary 2 4 2 2 2 3 3 2
F. Comments
Afr estimated from Boulder A.
All times in UTC
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