Viewing archive of Wednesday, 9 February 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 Feb 09 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 040 Issued at 2200Z on 09 Feb 2011IA. Analysis of Solar Active Regions and Activity from 08-2100Z to 09-2100Z Solar activity was moderate. Region 1153 (N15W88)
produced a M1/Sf flare at 09/0131Z after rapidly increasing in size
and magnetic complexity while nearing the west limb.
IB. Solar Activity Forecast
Solar activity is expected to be low
on day 1 (10 February) with C-class flares likely and a slight
chance for another M-class flare. After Region 1153 moves around the
limb, solar activity is forecast to be very low to low with a chance
for a C-class flare on days 2 and 3 (11-12 February).
IIA. Geophysical Activity Summary 08-2100Z to 09-2100Z
The geomagnetic field was quiet. The greater than 2 MeV electron flux
at geosynchronous orbit was at high levels throughout the period.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be predominately quiet for the next 3 days (10-12
February).
III. Event Probabilities 10 Feb to 12 Feb
| Class M | 20% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | Green | ||
IV. Penticton 10.7 cm Flux
Observed 09 Feb 089 Predicted 10 Feb-12 Feb 088/086/084 90 Day Mean 09 Feb 084
V. Geomagnetic A Indices
Observed Afr/Ap 08 Feb 003/004 Estimated Afr/Ap 09 Feb 003/005 Predicted Afr/Ap 10 Feb-12 Feb 005/005-005/005-005/005
VI. Geomagnetic Activity Probabilities 10 Feb to 12 Feb
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 20% | 20% | 20% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 20% | 20% | 20% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
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