Viewing archive of Thursday, 4 December 2008
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 2008 Dec 04 2201 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 339 Issued at 2200Z on 04 Dec 2008IA. Analysis of Solar Active Regions and Activity from 03-2100Z to 04-2100Z Solar activity was very low. No flares occurred during
the past 24 hours and the solar disk continues to be spotless.
IB. Solar Activity Forecast
Solar activity is expected to be very
low.
IIA. Geophysical Activity Summary 03-2100Z to 04-2100Z
The geomagnetic field was quiet to unsettled during the past 24
hours. Solar wind data indicated the continuation of a high speed
solar wind stream with peak velocities around 500 km/s. However,
velocity showed a steady decline after 0700Z and was around 380 km/s
at forecast issue time.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be generally unsettled with chance for an isolated
active period for the first day (05 December). Quiet to unsettled
levels are expected for the second day (06 December) and generally
quiet levels are expected for the third day (07 December).
III. Event Probabilities 05 Dec to 07 Dec
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | Green | ||
IV. Penticton 10.7 cm Flux
Observed 04 Dec 070 Predicted 05 Dec-07 Dec 070/070/070 90 Day Mean 04 Dec 068
V. Geomagnetic A Indices
Observed Afr/Ap 03 Dec 004/004 Estimated Afr/Ap 04 Dec 010/010 Predicted Afr/Ap 05 Dec-07 Dec 010/012-007/008-005/005
VI. Geomagnetic Activity Probabilities 05 Dec to 07 Dec
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 30% | 15% | 05% |
| Minor storm | 10% | 05% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 35% | 20% | 05% |
| Minor storm | 15% | 10% | 01% |
| Major-severe storm | 05% | 05% | 01% |
All times in UTC
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