Viewing archive of Saturday, 15 December 2012
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 2012 Dec 15 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 15 Dec 2012IA. Analysis of Solar Active Regions and Activity from 14-2100Z to 15-2100Z Solar activity has been at low levels for the past 24 hours.
The largest solar event of the period was a C1 event observed at
15/1947Z from Region 1631 (N21W46). 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 days one, two, and three (16
Dec, 17 Dec, 18 Dec).
IIA. Geophysical Activity Summary 14-2100Z to 15-2100Z
The geomagnetic
field has been at quiet levels for the past 24 hours. Solar wind speed,
as measured by the ACE spacecraft, reached a peak speed of 400 km/s at
15/2035Z. Total IMF reached 11.5 nT at 15/0022Z. The maximum southward
component of Bz reached -8.9 nT at 15/0038Z. Protons greater than 10 MeV
at geosynchronous orbit reached a peak level of 9 pfu at 15/0155Z.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to unsettled levels for the next three days (16 Dec, 17
Dec, 18 Dec) with a chance for active periods on 17 December.
III. Event Probabilities 16 Dec to 18 Dec
| Class M | 15% | 15% | 15% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 15 Dec 122 Predicted 16 Dec-18 Dec 125/125/120 90 Day Mean 15 Dec 120
V. Geomagnetic A Indices
Observed Afr/Ap 14 Dec 004/002 Estimated Afr/Ap 15 Dec 006/006 Predicted Afr/Ap 16 Dec-18 Dec 007/008-012/016-011/012
VI. Geomagnetic Activity Probabilities 16 Dec to 18 Dec
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 05% | 15% | 15% |
| Minor storm | 01% | 01% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 10% | 20% | 15% |
| Major-severe storm | 05% | 20% | 15% |
All times in UTC
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