Viewing archive of Saturday, 4 October 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 Oct 04 2201 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 278 Issued at 2200Z on 04 Oct 2008IA. Analysis of Solar Active Regions and Activity from 03-2100Z to 04-2100Z Solar activity was very low. New Region 1003 (S23E28)
was numbered today.
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 at quiet to unsettled levels with isolated
minor storm conditions observed for the period of 04/0600Z.
Although velocities reflect a gradual decrease, to around 570 km/s,
solar wind observations from the ACE spacecraft indicate a continued
influence from the high speed solar wind stream. The greater than 2
MeV electron flux at geosynchronous orbit reached high levels today.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be at quiet to unsettled levels for 05 October. Mostly
quiet conditions should return for 06-07 October as the high speed
solar wind stream subsides.
III. Event Probabilities 05 Oct to 07 Oct
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | Green | ||
IV. Penticton 10.7 cm Flux
Observed 04 Oct 067 Predicted 05 Oct-07 Oct 066/066/066 90 Day Mean 04 Oct 066
V. Geomagnetic A Indices
Observed Afr/Ap 03 Oct 010/013 Estimated Afr/Ap 04 Oct 010/010 Predicted Afr/Ap 05 Oct-07 Oct 007/008-005/005-005/005
VI. Geomagnetic Activity Probabilities 05 Oct to 07 Oct
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 05% | 05% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 10% | 05% | 05% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
All times in UTC
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