Viewing archive of Friday, 28 December 2001

Geophysical report

Solar and Geophysical Activity Summary 2001 Dec 28 0245 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Solar and Geophysical Activity Summary

SGAS Number 362 Issued at 0245Z on 28 Dec 2001 This report is compiled from data received at SWO on 27 Dec
A. Energetic Events
Begin  Max  End  Rgn   Loc   Xray  Op 245MHz 10cm   Sweep
0526 0613 0619  9752 S15W86 M1.4  2n        26
1127 1133 1141  9742 N08W80 M1.0  Sf        44
1339 1340 1340                       470
1643 1658 1720  9748 S10W66 M2.3  2n        110
1824 1828 1838  9743 S07W71       Sf 470
1859 1902 1908                       140
B. Proton Events
The greater than 10 MeV proton event, which began on 26 December, remains in progress. End of day flux levels are about 20 pfu.
C. Geomagnetic Activity Summary
The geomagnetic field was at quiet to unsettled levels.
D. Stratwarm
STRATWARM ALERT EXISTS STRATWARM THURSDAY STRONG STRATOSPHERIC WARMING, WEAKENING IN THE UPPER STRATOSPHERE, INTENSIFYING IN THE LOWER AND MIDDLE STRATOSPHERE. TEMPERATURE GRADIENT REVERSED BETWEEN 60N AND THE POLE FROM 10 TO 1 HPA, WITHIN 5 DAYS FROM 50 TO 5 HPA. EASTERLY ZONAL MEAN WINDS AT 60N FROM 5 TO 1 HPA.
E. Daily Indices: (real-time preliminary/estimated values)
10 cm 275  SSN 268  Afr/Ap 009/006   X-ray Background C3.6
Daily Proton Fluence (flux accumulation over 24 hrs)
GT 1 MeV 6.8e+07   GT 10 MeV 3.8e+06 p/(cm2-ster-day)
(GOES-8 satellite synchronous orbit W75 degrees)
Daily Electron Fluence
GT 2 MeV 9.90e+06 e/(cm2-ster-day)
(GOES-8 satellite synchronous orbit W75 degrees)
3 Hour K-indices
Boulder 2 1 1 2 3 3 3 2 Planetary 2 1 1 2 2 3 3 1
F. Comments
  Afr estimated from Boulder A.

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