Viewing archive of Saturday, 3 January 1998

Solar activity 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.
Report of Solar-Geophysical Activity 1998 Jan 03 2200 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 003 Issued at 2200Z on 03 JAN 1998

IA. Analysis of Solar Active Regions and Activity from 02-2100Z to 03-2100Z

SOLAR ACTIVITY CONTINUED AT A MODERATE LEVEL DUE TO AN OPTICALLY UNCORRELATED M2 AT 03/1719Z. THE LIKELY SOURCE FOR THIS EVENT WAS REGION 8124 LOCATED ONE DAY BEHIND THE WEST LIMB AT S22. TWO LARGE CORONAL MASS EJECTIONS OCCURRED. THE FIRST WAS COINCIDENT WITH A LONG DURATION (02/2335-03/0630Z) B6 X-RAY ENHANCEMENT. THE CME WAS NEARLY A COMPLETE HALO. THE SOURCE OF THIS CME WAS THE SLOW DISSOLUTION OF FILAMENT MATERIAL LOCATED NEAR N47W03. A POST-ERUPTION ARCADE BECAME VISIBLE DOWN TO NEAR REGION 8126 (N21W61). THE SECOND CME OCCURRED NEAR 03/1000Z FROM HIGH LATITUDES IN THE NORTHWEST QUADRANT. THIS EVENT WAS VERY BRIGHT IN CORONAGRAPH IMAGERY AND LIKELY RELATED TO THE ERUPTION OF LARGE POLAR CROWN FILAMENTS NEAR THE NORTHWEST LIMB. THE TRAJECTORY OF THIS MATERIAL WAS HIGHLY INCLINED TO THE ECLIPTIC.
IB. Solar Activity Forecast
SOLAR ACTIVITY SHOULD BECOME VERY LOW TO LOW FOR THE NEXT THREE DAYS AS REGION 8124 MOVES SEVERAL DAYS BEHIND THE WEST LIMB.
IIA. Geophysical Activity Summary 02-2100Z to 03-2100Z
THE GEOMAGNETIC FIELD WAS PREDOMINANTLY QUIET.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD SHOULD BE QUIET TO SLIGHTLY UNSETTLED FOR 04-05 JAN. UNSETTLED TO ACTIVE CONDITIONS ARE FORECAST IN THE LATTER HALF OF 06 JAN AND FOR 07 JAN IN RESPONSE TO THE HALO EVENT MENTIONED ABOVE. ISOLATED MINOR STORM CONDITIONS AT HIGH LATITUDES ARE POSSIBLE DURING THE DISTURBANCE. THE SECOND CORONAL MASS EJECTION IS NOT EXPECTED TO IMPACT THE EARTH.
III. Event Probabilities 04 JAN to 06 JAN
Class M05%05%01%
Class X01%01%01%
Proton01%01%01%
PCAFGREEN
IV. Penticton 10.7 cm Flux
  Observed       03 JAN 101
  Predicted   04 JAN-06 JAN  092/088/086
  90 Day Mean        03 JAN 095
V. Geomagnetic A Indices
OBSERVED AFR/AP 02 JAN  006/004
ESTIMATED AFR/AP 03 JAN  005/005
PREDICTED AFR/AP 04 JAN-06 JAN  005/005-005/005-010/010
VI. Geomagnetic Activity Probabilities 04 JAN to 06 JAN
A. Middle Latitudes
Active10%10%35%
Minor storm05%05%15%
Major-severe storm01%01%05%
B. High Latitudes
Active10%10%40%
Minor storm05%05%25%
Major-severe storm01%01%10%

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