Viewing archive of Thursday, 8 April 2010
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 2010 Apr 08 2201 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 2010IA. Analysis of Solar Active Regions and Activity from 07-2100Z to 08-2100Z Solar activity has been very low. Region 1060 (N25E00)
produced a B3 flare at 08/0325Z with an associated EIT wave and a
earth directed full halo CME. SOHO C2 imagery observed a second CME
at 08/1030Z located along a filament channel in the northeast
quadrant of the disk. This CME is not expected to become
geoeffective.
IB. Solar Activity Forecast
Solar activity is expected to be very
low, with a slight chance of a C-class event.
IIA. Geophysical Activity Summary 07-2100Z to 08-2100Z
The geomagnetic field has been at quiet to active levels.
Observations from the ACE spacecraft show continued influence from
the coronal hole high speed stream. Solar wind speeds have averaged
600 km/s with IMF Bz fluctuations ranging from -4/+4 nT. The
greater than 2 MeV electron flux at geosynchronous orbit reached
very high levels.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be quiet to unsettled for day one (09 April). Days two
and three (10-11 April) are expected to be predominately quiet, as
the high speed stream subsides.
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 076 Predicted 09 Apr-11 Apr 075/075/075 90 Day Mean 08 Apr 083
V. Geomagnetic A Indices
Observed Afr/Ap 07 Apr 015/021 Estimated Afr/Ap 08 Apr 008/010 Predicted Afr/Ap 09 Apr-11 Apr 007/008-005/005-005/005
VI. Geomagnetic Activity Probabilities 09 Apr to 11 Apr
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 05% | 01% | 01% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 01% | 01% |
| Minor storm | 05% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
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