Viewing archive of Friday, 28 November 1997

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 1997 Nov 28 2200 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 332 Issued at 2200Z on 28 NOV 1997

IA. Analysis of Solar Active Regions and Activity from 27-2100Z to 28-2100Z

SOLAR ACTIVITY WAS HIGH. REGION 8113 (N20E48) PRODUCED ANOTHER MAJOR FLARE, AN M6/2B AT 28/0503Z. IT ALSO GENERATED AN M1/SF AT 28/2009Z AND SEVERAL C-CLASS FLARES DURING THE PERIOD. THIS REGION REMAINS A MAGNETICALLY COMPLEX E-TYPE SUNSPOT GROUP. OTHER REGIONS WERE QUIET.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE MODERATE TO HIGH. REGION 8113 APPEARS CAPABLE OF ANOTHER MAJOR FLARE.
IIA. Geophysical Activity Summary 27-2100Z to 28-2100Z
THE GEOMAGNETIC FIELD WAS QUIET. THE GREATER THAN 2 MEV ELECTRON FLUX REMAINED HIGH.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS EXPECTED TO BE QUIET FOR THE NEXT 24 HOURS OR SO, BECOMING QUIET TO UNSETTLED BY THE END OF THE THREE DAY FORECAST PERIOD.
III. Event Probabilities 29 NOV to 01 DEC
Class M75%75%75%
Class X10%10%10%
Proton05%05%05%
PCAFYELLOW
IV. Penticton 10.7 cm Flux
  Observed       28 NOV 116
  Predicted   29 NOV-01 DEC  120/125/125
  90 Day Mean        28 NOV 093
V. Geomagnetic A Indices
OBSERVED AFR/AP 27 NOV  002/002
ESTIMATED AFR/AP 28 NOV  003/003
PREDICTED AFR/AP 29 NOV-01 DEC  005/005-005/008-010/010
VI. Geomagnetic Activity Probabilities 29 NOV to 01 DEC
A. Middle Latitudes
Active10%10%10%
Minor storm05%05%05%
Major-severe storm01%01%05%
B. High Latitudes
Active10%10%10%
Minor storm05%05%05%
Major-severe storm01%01%05%

All times in UTC

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