Viewing archive of Thursday, 10 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 10 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 344 Issued at 2200Z on 10 Dec 2015IA. Analysis of Solar Active Regions and Activity from 09-2100Z to 10-2100Z Solar activity has been at low levels for the past 24 hours.
The largest solar event of the period was a C3 event observed at
10/0750Z from Region 2468 (S15E65). There are currently 6 numbered
sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is likely to be low with a
slight chance for an M-class flare on days one, two, and three (11 Dec,
12 Dec, 13 Dec).
IIA. Geophysical Activity Summary 09-2100Z to 10-2100Z
The geomagnetic
field has been at quiet to minor storm levels for the past 24 hours.
Solar wind speed, as measured by the ACE spacecraft, reached a peak
speed of 711 km/s at 10/2058Z. Total IMF reached 11 nT at 10/0556Z. The
maximum southward component of Bz reached -9 nT at 10/0733Z. Electrons
greater than 2 MeV at geosynchronous orbit reached a peak level of 3235
pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at unsettled to minor storm levels on day one (11 Dec) and quiet
to active levels on days two and three (12 Dec, 13 Dec).
III. Event Probabilities 11 Dec to 13 Dec
| Class M | 10% | 10% | 10% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 10 Dec 109 Predicted 11 Dec-13 Dec 112/115/120 90 Day Mean 10 Dec 107
V. Geomagnetic A Indices
Observed Afr/Ap 09 Dec 006/007 Estimated Afr/Ap 10 Dec 017/025 Predicted Afr/Ap 11 Dec-13 Dec 016/022-013/016-011/012
VI. Geomagnetic Activity Probabilities 11 Dec to 13 Dec
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 35% | 25% | 20% |
| Minor storm | 15% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 20% | 20% |
| Minor storm | 30% | 30% | 30% |
| Major-severe storm | 45% | 30% | 25% |
All times in UTC
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