Viewing archive of Tuesday, 25 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 25 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 360 Issued at 2200Z on 25 Dec 2012IA. Analysis of Solar Active Regions and Activity from 24-2100Z to 25-2100Z 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
25/1304Z from Region 1635 (N11W17). There are currently 3 numbered
sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be at low
levels on days one, two, and three (26 Dec, 27 Dec, 28 Dec).
IIA. Geophysical Activity Summary 24-2100Z to 25-2100Z
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 344 km/s at
25/0252Z. Total IMF reached 5.3 nT at 25/0334Z. The maximum southward
component of Bz reached -3.9 nT at 25/1629Z.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet levels for the next two days (26 - 27 December). By day
three (28 December), activity is expected to increase to quiet to
unsettled levels.
III. Event Probabilities 26 Dec to 28 Dec
| Class M | 05% | 05% | 05% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 25 Dec 113 Predicted 26 Dec-28 Dec 115/115/120 90 Day Mean 25 Dec 119
V. Geomagnetic A Indices
Observed Afr/Ap 24 Dec 002/002 Estimated Afr/Ap 25 Dec 002/003 Predicted Afr/Ap 26 Dec-28 Dec 005/005-005/005-007/008
VI. Geomagnetic Activity Probabilities 26 Dec to 28 Dec
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 05% | 05% | 10% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 20% |
| Minor storm | 10% | 10% | 20% |
| Major-severe storm | 05% | 05% | 10% |
All times in UTC
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