Viewing archive of Tuesday, 9 December 2014
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 2014 Dec 09 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 343 Issued at 2200Z on 09 Dec 2014IA. Analysis of Solar Active Regions and Activity from 08-2100Z to 09-2100Z
Solar activity has been at low levels for the past 24 hours.
The largest solar event of the period was a C8 event observed at
09/1024Z from Region 2230 (S14E22). There are currently 5 numbered
sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be low with
a slight chance for an M-class flare on day one (10 Dec) and expected to
be low with a chance for M-class flares on days two and three (11 Dec,
12 Dec).
IIA. Geophysical Activity Summary 08-2100Z to 09-2100Z
The geomagnetic
field has been at quiet to active levels for the past 24 hours. Solar
wind speed, as measured by the ACE spacecraft, reached a peak speed of
734 km/s at 09/0010Z. Total IMF reached 6 nT at 09/1848Z. The maximum
southward component of Bz reached -4 nT at 09/1726Z. Electrons greater
than 2 MeV at geosynchronous orbit reached a peak level of 5719 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet levels on days one, two, and three (10 Dec, 11 Dec, 12
Dec).
III. Event Probabilities 10 Dec to 12 Dec
| Class M | 20% | 25% | 30% |
| Class X | 01% | 01% | 05% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 09 Dec 140 Predicted 10 Dec-12 Dec 145/155/165 90 Day Mean 09 Dec 152
V. Geomagnetic A Indices
Observed Afr/Ap 08 Dec 011/012 Estimated Afr/Ap 09 Dec 013/015 Predicted Afr/Ap 10 Dec-12 Dec 007/008-007/008-006/005
VI. Geomagnetic Activity Probabilities 10 Dec to 12 Dec
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 25% | 25% | 10% |
| Minor storm | 05% | 05% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 30% | 30% | 20% |
| Major-severe storm | 35% | 35% | 10% |
All times in UTC
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