Viewing archive of Friday, 30 November 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 Nov 30 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 335 Issued at 2200Z on 30 Nov 2012IA. Analysis of Solar Active Regions and Activity from 29-2100Z to 30-2100Z Solar activity was low. Region 1625 (N14E36, Dao/beta-gamma)
remained the most flare-productive region with frequent low-level
C-class subflares. It showed some intermediate spot decay during the
period, but retained its beta-gamma magnetic configuration. Region 1620
(S13W81, Eai/beta-gamma) produced the largest flare of the period: a C5
at 30/1748 UTC as it approached the west limb. No significant changes
were noted in the region, but analysis was hampered due to limb
proximity. No significant changes were noted in Region 1623 (N08E35,
Dao/beta-gamma). There are currently 4 numbered sunspot regions on the
disk. No Earth-directed CME activity occurred during the period.
IB. Solar Activity Forecast
Activity is expected to be low through 03
December with a slight chance for an isolated M-class flare. At present,
Regions 1620 and 1625 appear to be the most capable of producing
isolated M-class activity.
IIA. Geophysical Activity Summary 29-2100Z to 30-2100Z
Geomagnetic
field activity was at quiet levels with no sign of the CME passage that
was expected to begin around 30/0000 UTC. Solar winds were low in the
approximate 326 to 363 km/s range. Electrons greater than 2 MeV at
geosynchronous orbit reached a peak level of 103 pfu.
IIB. Geophysical Activity Forecast
Geomagnetic field activity is
expected to increase to quiet to unsettled levels on 01 December with a
slight chance for active levels due to CH HSS effects. Activity is
expected to decrease to mostly quiet levels during 02 - 03 December as
the CH HSS subsides.
III. Event Probabilities 01 Dec to 03 Dec
| Class M | 20% | 15% | 10% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 30 Nov 111 Predicted 01 Dec-03 Dec 105/100/100 90 Day Mean 30 Nov 122
V. Geomagnetic A Indices
Observed Afr/Ap 29 Nov 002/002 Estimated Afr/Ap 30 Nov 003/004 Predicted Afr/Ap 01 Dec-03 Dec 007/008-004/005-005/005
VI. Geomagnetic Activity Probabilities 01 Dec to 03 Dec
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 10% | 05% |
| Minor storm | 05% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 25% | 15% | 10% |
| Major-severe storm | 25% | 10% | 05% |
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