Viewing archive of Thursday, 18 December 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 Dec 18 2200 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 352 Issued at 2200Z on 18 DEC 1997

IA. Analysis of Solar Active Regions and Activity from 17-2100Z to 18-2100Z

SOLAR ACTIVITY WAS VERY LOW. REGION 8123 (N19E06) IS THE ONLY SUNSPOT REGION ON THE DISK AND HAS BEEN QUIET.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE VERY LOW.
IIA. Geophysical Activity Summary 17-2100Z to 18-2100Z
THE GEOMAGNETIC FIELD RANGED FROM QUIET TO ACTIVE. ACTIVE CONDITIONS WERE EXPERIENCED AT MANY LOCATIONS DURING THE 18/0300-0600Z PERIOD.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS EXPECTED TO BE QUIET TO UNSETTLED.
III. Event Probabilities 19 DEC to 21 DEC
Class M01%01%01%
Class X01%01%01%
Proton01%01%01%
PCAFGREEN
IV. Penticton 10.7 cm Flux
  Observed       18 DEC 086
  Predicted   19 DEC-21 DEC  084/084/084
  90 Day Mean        18 DEC 093
V. Geomagnetic A Indices
OBSERVED AFR/AP 17 DEC  004/003
ESTIMATED AFR/AP 18 DEC  007/006
PREDICTED AFR/AP 19 DEC-21 DEC  010/010-010/015-010/020
VI. Geomagnetic Activity Probabilities 19 DEC to 21 DEC
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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