Viewing archive of Saturday, 29 December 2001

Geophysical report

Solar and Geophysical Activity Summary 2001 Dec 29 0245 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Solar and Geophysical Activity Summary

SGAS Number 363 Issued at 0245Z on 29 Dec 2001 This report is compiled from data received at SWO on 28 Dec
A. Energetic Events
Begin  Max  End  Rgn   Loc   Xray  Op 245MHz 10cm   Sweep
0342 0351 0356  9742 N04W90 M4.7  Sf        270
1210 1230 1259  9748 S12W77 M1.3  Sf
1653 1653 1654                       110
1937 1938 1941                       480
2002 2045 2132              X3.4     700    1600   II
2048 2052 2056  9754 S11E01       Sf 820
B. Proton Events
The greater than 10 MeV proton event which had been in progress since 26 December ended today. The event began at 26/0605 UTC, reached a maximum flux of 779 pfu at 26/1115 UTC, and ended at 28/1040 UTC.
C. Geomagnetic Activity Summary
The geomagnetic field was quiet to unsettled.
D. Stratwarm
STRATWARM ALERT/FRIDAY/STRATWARM EXISTS. STRONG STRATOSPHERIC WARMING, INTENSIFYING IN THE LOWER STRATOSPHERE, WEAKENING IN THE UPPER STRATOSPHERE. 5-DAY FORECASTS INDICATE A SPLIT OF THE POLAR VORTEX IN THE LOWER STRATOSPHERE, A REVERSED TEMPERATURE GRA- DIENT BETWEEN 60N AND THE NORTH POLE FROM 50 TO 10 HPA, NET EASTERLY WINDS AT 60N FROM 5 TO 2 HPA.
E. Daily Indices: (real-time preliminary/estimated values)
10 cm 263  SSN 263  Afr/Ap 009/005   X-ray Background C2.6
Daily Proton Fluence (flux accumulation over 24 hrs)
GT 1 MeV 4.0e+07   GT 10 MeV 7.7e+05 p/(cm2-ster-day)
(GOES-8 satellite synchronous orbit W75 degrees)
Daily Electron Fluence
GT 2 MeV 7.20e+06 e/(cm2-ster-day)
(GOES-8 satellite synchronous orbit W75 degrees)
3 Hour K-indices
Boulder 1 0 2 2 3 3 3 3 Planetary 1 0 1 2 2 2 2 2
F. Comments
  Afr estimated from Boulder A.

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