Viewing archive of Sunday, 8 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 08 2203 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 098 Issued at 2200Z on 08 Apr 2007

IA. Analysis of Solar Active Regions and Activity from 07-2100Z to 08-2100Z

Solar activity was at very low levels. The visible disk remains void of sunspots. No new regions were numbered today.
IB. Solar Activity Forecast
Solar activity is expected to remain at very low levels.
IIA. Geophysical Activity Summary 07-2100Z to 08-2100Z
The geomagnetic field was at quiet levels. The greater than 2 MeV electron flux at geosynchronous orbit reached high levels again today.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected to be at unsettled to active levels on 09 April due to the onset of a recurrent coronal hole. Isolated minor to major storm periods are possible once the coronal hole becomes geoeffective. Unsettled to isolated active conditions are expected on 10 April. Predominantly quiet to unsettled conditions are expected on 11 April as the coronal hole wanes.
III. Event Probabilities 09 Apr to 11 Apr
Class M01%01%01%
Class X01%01%01%
Proton01%01%01%
PCAFgreen
IV. Penticton 10.7 cm Flux
  Observed       08 Apr 071
  Predicted   09 Apr-11 Apr  070/070/070
  90 Day Mean        08 Apr 076
V. Geomagnetic A Indices
  Observed Afr/Ap 07 Apr  002/003
  Estimated     Afr/Ap 08 Apr  003/008
  Predicted    Afr/Ap 09 Apr-11 Apr  015/015-010/010-005/008
VI. Geomagnetic Activity Probabilities 09 Apr to 11 Apr
A. Middle Latitudes
Active30%20%15%
Minor storm15%10%05%
Major-severe storm10%05%01%
B. High Latitudes
Active35%25%20%
Minor storm20%15%10%
Major-severe storm15%05%05%

All times in UTC

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