Viewing archive of Sunday, 20 December 1998

Geophysical report

Solar and Geophysical Activity Summary 1998 Dec 20 0245 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Solar and Geophysical Activity Summary

SGAS Number 354 Issued at 0245Z on 20 DEC 1998 This report is compiled from data received at SWO on 19 DEC
A. Energetic Events
Begin  Max  End  Rgn   Loc   Xray  Op 245MHz 10cm   Sweep
0837 0837 0838                       110
1055 1055 1055                       100
1151 1151 1151                       530
B. Proton Events
None
C. Geomagnetic Activity Summary
THE GEOMAGNETIC FIELD WAS QUIET. SOLAR WIND PARAMETERS WERE VARIABLE (TOTAL FIELD AND DENSITY INCREASES AND PERIODS OF BZ SOUTHWARD) AT THE END OF THE PERIOD BUT HAD LITTLE EFFECT ON THE FIELD.
D. Stratwarm
STRATWARM ALERT/SATURDAY/STRATWARM EXISTS. MAJOR WARMING EXISTS. THE STRONG ANTICYCLONE OVER CANADIAN ARCTIC CONTINUES. THE INTENSE WARMING OVER POLAR REGION SLIGHTLY WEAKENING. THE MAIN VORTEX DISPLACED OVER SOUTHERN URAL AREA AND THE SECOND WEAKER VORTEX EXISTS OVER LABRADOR, TODAY. MEAN ZONAL WIND AT 60 N IS FROM EAST ( 15 M/S ) AT 10 HPA AND ABOVE IN THE UPPER STRATOSPHERE AND TEMPERATURE GRADIENT REVERSED BETWEEN 60 N AND THE POLE IN THE WHOLE STRATOSPHERE BELOW 2 HPA. FU
E. Daily Indices: (real-time preliminary/estimated values)
10 CM 138  SSN 088  AFR/AP 003/007   X-RAY BACKGROUND B8.7
DAILY PROTON FLUENCE (FLUX ACCUMULATION OVER 24 HRS)
GT 1 MEV 7.7E+05   GT 10 MEV 1.6E+04 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 0 1 2 2 1 2 PLANETARY 1 1 0 1 2 3 2 3
F. Comments
  None


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