Viewing archive of Thursday, 24 March 2011
Solar activity report
Report of Solar-Geophysical Activity 2011 Mar 24 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 083 Issued at 2200Z on 24 Mar 2011IA. Analysis of Solar Active Regions and Activity from 23-2100Z to 24-2100Z
Solar activity was moderate. Region 1176 (S16E44)
produced an isolated impulsive M1/1F flare at 24/1207Z associated
with minor radio emission and a partial-halo CME (estimated
plane-of-sky velocity 421 km/s). It also produced occasional B- and
C-class flares during the period. Region 1176 showed a minor
increase in intermediate spots and was classified as an Eki with a
moderately complex beta-gamma magnetic configuration. New Regions
1178 (S13E68) and 1179 (N09W32) were numbered. Both were small and
magnetically simple sunspot groups.
IB. Solar Activity Forecast
Solar activity is expected to be low
during the period (25 - 27 March) with a chance for
another M-class flare from Region 1176.
IIA. Geophysical Activity Summary 23-2100Z to 24-2100Z
Geomagnetic field activity was at quiet levels. ACE solar wind data
indicated Earth remained under the influence of a coronal hole
high-speed wind stream. Solar wind velocities were variable in the
419 to 500 km/s range. IMF Bz was northward during most of the
period.
IIB. Geophysical Activity Forecast
Geomagnetic field activity is
expected to be at mostly quiet levels through the period (25 - 27
March).
III. Event Probabilities 25 Mar to 27 Mar
| Class M | 40% | 40% | 40% |
| Class X | 05% | 05% | 05% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 24 Mar 108 Predicted 25 Mar-27 Mar 110/115/120 90 Day Mean 24 Mar 095
V. Geomagnetic A Indices
Observed Afr/Ap 23 Mar 009/010 Estimated Afr/Ap 24 Mar 003/005 Predicted Afr/Ap 25 Mar-27 Mar 005/005-005/005-005/005
VI. Geomagnetic Activity Probabilities 25 Mar to 27 Mar
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 10% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
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