Viewing archive of Friday, 16 December 2011
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 2011 Dec 16 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 350 Issued at 2200Z on 16 Dec 2011IA. Analysis of Solar Active Regions and Activity from 15-2100Z to 16-2100Z Solar activity was very low. The only flare in the
past 24 hours was a B4 at 0820Z from Region 1377 (N12E15). Region
1374 (S18W37) remains the largest spot group on the disk but
continues to be stable. New Region 1378 (S17W09) was assigned and
is classified as a D-type sunspot group.
IB. Solar Activity Forecast
Solar activity is expected to be very
low with a chance for isolated C-class flares.
IIA. Geophysical Activity Summary 15-2100Z to 16-2100Z
The geomagnetic field was quiet.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be mostly quiet for the next three days (17-19
December).
III. Event Probabilities 17 Dec to 19 Dec
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 16 Dec 121 Predicted 17 Dec-19 Dec 122/122/122 90 Day Mean 16 Dec 146
V. Geomagnetic A Indices
Observed Afr/Ap 15 Dec 002/001 Estimated Afr/Ap 16 Dec 001/001 Predicted Afr/Ap 17 Dec-19 Dec 005/005-006/005-006/005
VI. Geomagnetic Activity Probabilities 17 Dec to 19 Dec
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 05% | 05% | 05% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 10% | 10% | 10% |
| Major-severe storm | 05% | 05% | 05% |
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