Viewing archive of Friday, 20 February 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 Feb 20 2200 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 051 Issued at 2200Z on 20 FEB 1998

IA. Analysis of Solar Active Regions and Activity from 19-2100Z to 20-2100Z

SOLAR ACTIVITY WAS LOW, DUE TO A SINGLE C1/SF EVENT FROM REGION 8156 AT 20/1011Z. REGION 8156 REMAINS A STABLE 9-SPOT 'EKO' BETA-GAMMA GROUP.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE VERY LOW TO LOW, WITH THE CONTINUED POSSIBILITY OF ISOLATED C-CLASS ACTIVITY FROM REGION 8156.
IIA. Geophysical Activity Summary 19-2100Z to 20-2100Z
THE GEOMAGNETIC FIELD HAS BEEN MOSTLY QUIET FOR THE PAST 24 HOURS, EXCEPT FOR A SINGLE ISOLATED PERIOD OF ACTIVE CONDITIONS RECORDED DURING THE INTERVAL 20/0000-0300Z.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS EXPECTED TO BE MOSTLY QUIET FOR THE NEXT THREE DAYS.
III. Event Probabilities 21 FEB to 23 FEB
Class M01%01%01%
Class X01%01%01%
Proton01%01%01%
PCAFGREEN
IV. Penticton 10.7 cm Flux
  Observed       20 FEB 096
  Predicted   21 FEB-23 FEB  094/093/092
  90 Day Mean        20 FEB 096
V. Geomagnetic A Indices
OBSERVED AFR/AP 19 FEB  005/007
ESTIMATED AFR/AP 20 FEB  005/005
PREDICTED AFR/AP 21 FEB-23 FEB  005/005-005/005-005/005
VI. Geomagnetic Activity Probabilities 21 FEB to 23 FEB
A. Middle Latitudes
Active10%10%10%
Minor storm05%05%05%
Major-severe storm01%01%01%
B. High Latitudes
Active10%10%10%
Minor storm05%05%05%
Major-severe storm01%01%01%

All times in UTC

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