Viewing archive of Tuesday, 11 January 2011
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 2011 Jan 11 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 011 Issued at 2200Z on 11 Jan 2011IA. Analysis of Solar Active Regions and Activity from 10-2100Z to 11-2100Z Solar activity remained very low with occasional
low-level B-class flares. Region 1140 (N33W74) developed a few spots
north of its main spot and was classified as a Cso-type group. It
produced a B-class flare as it approached the west limb. Region 1146
(N23E33) showed little change during the period and produced a
single B-class flare. Two B-class flares were observed on the
southwest limb and attributed to plage Region 1142 (S17, L=212),
which departed the visible disk early in the period.
IB. Solar Activity Forecast
Solar activity is expected to be very
low through the period (12 - 14 January).
IIA. Geophysical Activity Summary 10-2100Z to 11-2100Z
Geomagnetic field activity was at mostly quiet levels. The greater
than 2 MeV electron flux at geosynchronous orbit reached high levels
during the period.
IIB. Geophysical Activity Forecast
Geomagnetic field activity is
expected to be at mostly quiet levels during days 1 - 2 (12 - 13
January). Activity is expected to increase to quiet to unsettled
levels with a chance for brief active levels on day 3 (14 January)
as a recurrent coronal high-speed stream becomes geoeffective.
III. Event Probabilities 12 Jan to 14 Jan
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 11 Jan 083 Predicted 12 Jan-14 Jan 082/080/080 90 Day Mean 11 Jan 084
V. Geomagnetic A Indices
Observed Afr/Ap 10 Jan 004/005 Estimated Afr/Ap 11 Jan 004/004 Predicted Afr/Ap 12 Jan-14 Jan 005/005-005/005-007/008
VI. Geomagnetic Activity Probabilities 12 Jan to 14 Jan
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 05% | 05% | 20% |
| Minor storm | 01% | 01% | 10% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 30% |
| Minor storm | 01% | 01% | 15% |
| Major-severe storm | 01% | 01% | 01% |
All times in UTC
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