Viewing archive of Wednesday, 8 April 2009
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 2009 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 2009IA. Analysis of Solar Active Regions and Activity from 07-2100Z to 08-2100Z Solar activity was very low. No flares were observed
the past 24 hours. The solar disk remains spotless.
IB. Solar Activity Forecast
Solar activity is expected to be very
low.
IIA. Geophysical Activity Summary 07-2100Z to 08-2100Z
The geomagnetic field was at quiet to unsettled conditions.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be quiet to unsettled conditions for 09 - 10 April due
to a recurrent coronal hole high speed stream. Isolated active
levels at mid latitudes, and isolated minor storm conditions at high
latitudes are possible on 09 April associated with the increase in
activity. Predominantly quiet levels are expected on 11 April.
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 070 Predicted 09 Apr-11 Apr 070/070/070 90 Day Mean 08 Apr 070
V. Geomagnetic A Indices
Observed Afr/Ap 07 Apr 002/002 Estimated Afr/Ap 08 Apr 005/008 Predicted Afr/Ap 09 Apr-11 Apr 010/015-007/008-005/005
VI. Geomagnetic Activity Probabilities 09 Apr to 11 Apr
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 35% | 30% | 05% |
| Minor storm | 10% | 05% | 01% |
| Major-severe storm | 05% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 35% | 35% | 10% |
| Minor storm | 15% | 10% | 01% |
| Major-severe storm | 05% | 05% | 01% |
All times in UTC
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