Viewing archive of Saturday, 13 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 12 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 346 Issued at 2200Z on 12 Dec 2014IA. Analysis of Solar Active Regions and Activity from 11-2100Z to 12-2100Z Solar activity has been at low levels for the past 24 hours.
The largest solar event of the period was a C4 event observed at
12/1440Z from Region 2234 (N04W12). There are currently 8 numbered
sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be low with
a chance for M-class flares on days one, two, and three (13 Dec, 14 Dec,
15 Dec).
IIA. Geophysical Activity Summary 11-2100Z to 12-2100Z
The geomagnetic
field has been at unsettled to minor storm levels for the past 24 hours.
Solar wind speed, as measured by the ACE spacecraft, reached a peak
speed of 697 km/s at 12/2059Z. Total IMF reached 11 nT at 12/0122Z. The
maximum southward component of Bz reached -10 nT at 12/1040Z. Electrons
greater than 2 MeV at geosynchronous orbit reached a peak level of 2927
pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at unsettled to active levels on day one (13 Dec) and quiet to
active levels on days two and three (14 Dec, 15 Dec).
III. Event Probabilities 13 Dec to 15 Dec
| Class M | 30% | 30% | 30% |
| Class X | 05% | 05% | 05% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 12 Dec 154 Predicted 13 Dec-15 Dec 160/165/170 90 Day Mean 12 Dec 152
V. Geomagnetic A Indices
Observed Afr/Ap 11 Dec 004/003 Estimated Afr/Ap 12 Dec 015/019 Predicted Afr/Ap 13 Dec-15 Dec 015/018-012/015-013/015
VI. Geomagnetic Activity Probabilities 13 Dec to 15 Dec
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 45% | 40% | 40% |
| Minor storm | 20% | 15% | 15% |
| Major-severe storm | 05% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 10% |
| Minor storm | 25% | 30% | 30% |
| Major-severe storm | 65% | 55% | 55% |
All times in UTC
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