Viewing archive of Sunday, 22 April 2007

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 2007 Apr 22 2203 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 112 Issued at 2200Z on 22 Apr 2007

IA. Analysis of Solar Active Regions and Activity from 21-2100Z to 22-2100Z

Solar activity was very low. The visible solar disk remains spotless.
IB. Solar Activity Forecast
Solar activity is expected to be very low.
IIA. Geophysical Activity Summary 21-2100Z to 22-2100Z
The geomagnetic field was quiet to unsettled. The solar wind speed increased to about 450 km/s due to a recurrent coronal hole high speed stream.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected to be quiet to unsettled for the next three days (23 - 25 April). Isolated active periods are possible at high latitudes on 23 April due to the coronal hole high speed stream.
III. Event Probabilities 23 Apr to 25 Apr
Class M01%01%01%
Class X01%01%01%
Proton01%01%01%
PCAFGreen
IV. Penticton 10.7 cm Flux
  Observed       22 Apr 069
  Predicted   23 Apr-25 Apr  070/070/070
  90 Day Mean        22 Apr 074
V. Geomagnetic A Indices
  Observed Afr/Ap 21 Apr  002/002
  Estimated     Afr/Ap 22 Apr  008/012
  Predicted    Afr/Ap 23 Apr-25 Apr  010/010-005/005-005/005
VI. Geomagnetic Activity Probabilities 23 Apr to 25 Apr
A. Middle Latitudes
Active25%20%20%
Minor storm10%05%05%
Major-severe storm01%01%01%
B. High Latitudes
Active30%20%20%
Minor storm15%05%05%
Major-severe storm05%01%01%

All times in UTC

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