Viewing archive of Saturday, 5 January 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 Jan 05 2203 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 005 Issued at 2200Z on 05 Jan 2008IA. Analysis of Solar Active Regions and Activity from 04-2100Z to 05-2100Z Solar activity was very low. No flares were observed
during the past 24 hours. Region 981 (N29E14) is currently the only
spotted region on the disk but is quiet and stable.
IB. Solar Activity Forecast
Solar activity is expected to be very
low.
IIA. Geophysical Activity Summary 04-2100Z to 05-2100Z
The geomagnetic field was initially quiet but after 0600Z became
predominantly unsettled to active with isolated minor storming in
some locations. Real-time solar wind observations showed a marked
increase in velocity, magnetic field and temperature at about
04/2330Z, and then again at 05/0600Z. The signatures are most
consistent with a high-speed stream from a coronal hole, although
there may have been some complicating influence from the interaction
of recent transient activity with the stream.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be mostly unsettled to active for the next two days
(06-07 January) due to ongoing persistence from the high speed
stream. Activity is expected to subside somewhat on the third day
(08 January) as the stream should be declining at that time.
III. Event Probabilities 06 Jan to 08 Jan
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 05 Jan 080 Predicted 06 Jan-08 Jan 080/080/080 90 Day Mean 05 Jan 073
V. Geomagnetic A Indices
Observed Afr/Ap 04 Jan 002/002 Estimated Afr/Ap 05 Jan 015/015 Predicted Afr/Ap 06 Jan-08 Jan 012/015-012/015-007/010
VI. Geomagnetic Activity Probabilities 06 Jan to 08 Jan
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 45% | 45% | 15% |
| Minor storm | 15% | 15% | 10% |
| Major-severe storm | 05% | 05% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 40% | 40% | 25% |
| Minor storm | 25% | 25% | 15% |
| Major-severe storm | 10% | 10% | 05% |
All times in UTC
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