Viewing archive of Sunday, 30 December 2007
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 2007 Dec 30 2203 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 364 Issued at 2200Z on 30 Dec 2007IA. Analysis of Solar Active Regions and Activity from 29-2100Z to 30-2100Z Solar activity was low due to a C1.7 flare observed at
30/2005Z. The most likely origin of the flare was a brightening on
the east limb near where old Region 978 (S08, L=223) is expected to
return.
IB. Solar Activity Forecast
Solar activity is expected to remain
very low to low. An increasing chance of C-class activity is
expected through the forecast period (31 Dec 07 - 2 Jan 08).
IIA. Geophysical Activity Summary 29-2100Z to 30-2100Z
The geomagnetic field was quiet. The greater than 2 MeV electrons at
geosynchronous orbit reached high levels again today.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to remain quiet.
III. Event Probabilities 31 Dec to 02 Jan
| Class M | 01% | 05% | 05% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | Green | ||
IV. Penticton 10.7 cm Flux
Observed 30 Dec 075 Predicted 31 Dec-02 Jan 075/075/080 90 Day Mean 30 Dec 071
V. Geomagnetic A Indices
Observed Afr/Ap 29 Dec 002/002 Estimated Afr/Ap 30 Dec 005/005 Predicted Afr/Ap 31 Dec-02 Jan 005/005-005/005-005/005
VI. Geomagnetic Activity Probabilities 31 Dec to 02 Jan
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 10% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 10% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 00% |
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