Viewing archive of Sunday, 30 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 30 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 365 Issued at 2200Z on 30 Dec 2012IA. Analysis of Solar Active Regions and Activity from 29-2100Z to 30-2100Z Solar activity has been at very low levels for the past 24
hours. There are currently 3 numbered sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is likely to be low with a
slight chance for M-class flares on days one, two, and three (31 Dec, 01
Jan, 02 Jan).
IIA. Geophysical Activity Summary 29-2100Z to 30-2100Z
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 492 km/s at
30/2035Z. Total IMF reached 11.8 nT at 30/0720Z. The maximum southward
component of Bz reached -10.2 nT at 30/1338Z.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be quiet on day 1 (31 Dec). Quiet to unsettled with a slight chance
for active periods are expected on days 2-3 (01 Jan, 02 Jan).
III. Event Probabilities 31 Dec to 02 Jan
| Class M | 10% | 10% | 10% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 30 Dec 107 Predicted 31 Dec-02 Jan 105/105/110 90 Day Mean 30 Dec 117
V. Geomagnetic A Indices
Observed Afr/Ap 29 Dec 003/003 Estimated Afr/Ap 30 Dec 004/004 Predicted Afr/Ap 31 Dec-02 Jan 005/005-006/008-010/010
VI. Geomagnetic Activity Probabilities 31 Dec to 02 Jan
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 05% | 15% | 15% |
| Minor storm | 01% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 10% | 20% | 25% |
| Major-severe storm | 05% | 20% | 20% |
All times in UTC
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