Viewing archive of Tuesday, 25 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 25 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 025 Issued at 2200Z on 25 Jan 2011IA. Analysis of Solar Active Regions and Activity from 24-2100Z to 25-2100Z Solar activity decreased to very low levels. A single
B1 flare was observed during the period from Region 1149 (N17W62).
Region 1149 showed a decrease in area and was classified as a
Dso-beta group. Region 1147 (N24W65) remained stable.
IB. Solar Activity Forecast
Solar activity is expected to be very
low, with a slight chance for an isolated C-class flare.
IIA. Geophysical Activity Summary 24-2100Z to 25-2100Z
The geomagnetic field was at quiet levels, with isolated unsettled
periods at high latitudes.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be at quiet levels, with isolated unsettled periods at
high latitudes on day one (27 January). Quiet levels are expected on
days two and three (27-28 January).
III. Event Probabilities 26 Jan to 28 Jan
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 25 Jan 081 Predicted 26 Jan-28 Jan 080/079/078 90 Day Mean 25 Jan 084
V. Geomagnetic A Indices
Observed Afr/Ap 24 Jan 002/003 Estimated Afr/Ap 25 Jan 003/005 Predicted Afr/Ap 26 Jan-28 Jan 005/005-005/005-005/005
VI. Geomagnetic Activity Probabilities 26 Jan to 28 Jan
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 05% | 05% | 05% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 10% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
All times in UTC
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