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 UTCPrepared 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 2007IA. 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 M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
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 | |||
|---|---|---|---|
| Active | 30% | 20% | 15% |
| Minor storm | 15% | 10% | 05% |
| Major-severe storm | 10% | 05% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 35% | 25% | 20% |
| Minor storm | 20% | 15% | 10% |
| Major-severe storm | 15% | 05% | 05% |
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