Viewing archive of Sunday, 23 April 2006

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 2006 Apr 23 2204 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 113 Issued at 2200Z on 23 Apr 2006

IA. Analysis of Solar Active Regions and Activity from 22-2100Z to 23-2100Z

Solar activity was very low. New Region 875 (S11E71) was numbered today. This region was responsible for numerous B-class flares.
IB. Solar Activity Forecast
Solar activity is expected to be very low to low.
IIA. Geophysical Activity Summary 22-2100Z to 23-2100Z
The geomagnetic field was mostly quiet to unsettled. An isolated active period was observed at mid-latitudes between 23/0600 UTC and 0900 UTC. Solar wind speed at ACE has decreased from approximately 600 km/s to 500 km/s.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected to be quiet to unsettled.
III. Event Probabilities 24 Apr to 26 Apr
Class M05%05%05%
Class X01%01%01%
Proton01%01%01%
PCAFgreen
IV. Penticton 10.7 cm Flux
  Observed       23 Apr 087
  Predicted   24 Apr-26 Apr  085/085/090
  90 Day Mean        23 Apr 078
V. Geomagnetic A Indices
  Observed Afr/Ap 22 Apr  010/018
  Estimated     Afr/Ap 23 Apr  008/008
  Predicted    Afr/Ap 24 Apr-26 Apr  005/008-005/005-005/005
VI. Geomagnetic Activity Probabilities 24 Apr to 26 Apr
A. Middle Latitudes
Active15%15%15%
Minor storm05%05%05%
Major-severe storm01%01%01%
B. High Latitudes
Active20%15%15%
Minor storm10%05%05%
Major-severe storm01%01%01%

All times in UTC

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