Viewing archive of Monday, 31 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 31 2203 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 365 Issued at 2200Z on 31 Dec 2007IA. Analysis of Solar Active Regions and Activity from 30-2100Z to 31-2100Z Solar activity was low. A C8.3 flare occurred at
31/0111Z accompanied by Type II and Type IV radio sweeps (estimated
shock speed 682 km/s). An associated CME was observed on the east
limb near S09. The bright region from which the event originated
has been assigned Region 980 (S09E90).
IB. Solar Activity Forecast
Solar activity is expected to continue
at low levels with a slight chance of an M-Class flare from Region
980.
IIA. Geophysical Activity Summary 30-2100Z to 31-2100Z
The geomagnetic field was quiet. The greater than 2 MeV electrons at
geosynchronous orbit remained at high levels today.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to remain quiet.
III. Event Probabilities 01 Jan to 03 Jan
| Class M | 15% | 15% | 15% |
| Class X | 05% | 05% | 05% |
| Proton | 01% | 01% | 01% |
| PCAF | Green | ||
IV. Penticton 10.7 cm Flux
Observed 31 Dec 077 Predicted 01 Jan-03 Jan 078/080/085 90 Day Mean 31 Dec 072
V. Geomagnetic A Indices
Observed Afr/Ap 30 Dec 003/002 Estimated Afr/Ap 31 Dec 005/005 Predicted Afr/Ap 01 Jan-03 Jan 005/005-005/005-005/005
VI. Geomagnetic Activity Probabilities 01 Jan to 03 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% | 01% |
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