Viewing archive of Wednesday, 17 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 17 2201 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 352 Issued at 2200Z on 17 Dec 2008IA. Analysis of Solar Active Regions and Activity from 16-2100Z to 17-2100Z Solar activity was very low.
IB. Solar Activity Forecast
Solar activity is expected to be very
low.
IIA. Geophysical Activity Summary 16-2100Z to 17-2100Z
The geomagnetic field was predominantly quiet. The ACE spacecraft
indicated a possible CME signature from a filament that erupted on
12 December. There was a slight increase in wind speed and density
with minor fluctuations in the IMF.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be at quiet levels for the next three days (18-20
December)
III. Event Probabilities 18 Dec to 20 Dec
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | Green | ||
IV. Penticton 10.7 cm Flux
Observed 17 Dec 069 Predicted 18 Dec-20 Dec 068/068/068 90 Day Mean 17 Dec 069
V. Geomagnetic A Indices
Observed Afr/Ap 16 Dec 004/004 Estimated Afr/Ap 17 Dec 005/005 Predicted Afr/Ap 18 Dec-20 Dec 005/005-005/005-005/005
VI. Geomagnetic Activity Probabilities 18 Dec to 20 Dec
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 05% | 05% | 05% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 05% | 05% | 05% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
All times in UTC
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