Viewing archive of Sunday, 13 December 2015
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 2015 Dec 13 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 347 Issued at 2200Z on 13 Dec 2015IA. Analysis of Solar Active Regions and Activity from 12-2100Z to 13-2100Z Solar activity has been at low levels for the past 24 hours.
The largest solar event of the period was a C5 event observed at
13/1034Z from Region 2468 (S15E26). There are currently 5 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 (14 Dec, 15 Dec,
16 Dec).
IIA. Geophysical Activity Summary 12-2100Z to 13-2100Z
The geomagnetic
field has been at quiet to unsettled levels for the past 24 hours. Solar
wind speed, as measured by the ACE spacecraft, reached a peak speed of
578 km/s at 12/2234Z. Electrons greater than 2 MeV at geosynchronous
orbit reached a peak level of 8708 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to unsettled levels on day one (14 Dec), quiet to active
levels on day two (15 Dec) and unsettled to minor storm levels on day
three (16 Dec).
III. Event Probabilities 14 Dec to 16 Dec
| Class M | 35% | 35% | 35% |
| Class X | 05% | 05% | 05% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 13 Dec 123 Predicted 14 Dec-16 Dec 125/130/130 90 Day Mean 13 Dec 108
V. Geomagnetic A Indices
Observed Afr/Ap 12 Dec 008/008 Estimated Afr/Ap 13 Dec 009/010 Predicted Afr/Ap 14 Dec-16 Dec 007/008-013/018-018/025
VI. Geomagnetic Activity Probabilities 14 Dec to 16 Dec
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 35% | 40% |
| Minor storm | 01% | 10% | 15% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 20% | 15% | 10% |
| Minor storm | 30% | 30% | 30% |
| Major-severe storm | 20% | 45% | 50% |
All times in UTC
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