Viewing archive of Saturday, 9 December 2000

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 2000 Dec 09 2200 UTC
Prepared by the NOAA © SWPC and processed by

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 344 Issued at 2200Z on 09 Dec 2000

IA. Analysis of Solar Active Regions and Activity from 08-2100Z to 09-2100Z

Solar activity was low. Several minor C-class X-ray events with no optical correlation were observed. Most of the number regions showed little change with only region 9262 indicating some slight growth since yesterday. New region 9263 (N18E67) was numbered today.
IB. Solar Activity Forecast
Solar activity is expected to continue at low levels.
IIA. Geophysical Activity Summary 08-2100Z to 09-2100Z
The geomagnetic field was unsettled to active due to a high speed coronal hole stream. The solar wind has maintained an average speed between 600 to 650 km/s during the period.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected to be predominantely unsettled to active the first half of the period becoming more quiet to unsettled during the last half. Isolated minor storm conditions are possible in the high latitudes.
III. Event Probabilities 10 Dec to 12 Dec
Class M25%25%25%
Class X05%05%05%
IV. Penticton 10.7 cm Flux
  Observed       09 Dec 135
  Predicted   10 Dec-12 Dec  140/145/145
  90 Day Mean        09 Dec 175
V. Geomagnetic A Indices
  Observed Afr/Ap 08 Dec  011/017
  Estimated     Afr/Ap 09 Dec  018/020
  Predicted    Afr/Ap 10 Dec-12 Dec  014/015-010/012-008/010
VI. Geomagnetic Activity Probabilities 10 Dec to 12 Dec
A. Middle Latitudes
Minor storm20%10%05%
Major-severe storm05%01%01%
B. High Latitudes
Minor storm25%15%10%
Major-severe storm10%05%01%

All times in UTC

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