Viewing archive of Tuesday, 24 May 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 May 24 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 144 Issued at 2200Z on 24 May 2011IA. Analysis of Solar Active Regions and Activity from 23-2100Z to 24-2100Z Solar activity was very low. The two spotted regions
on the visible disk were magnetically simple and quiescent.
IB. Solar Activity Forecast
Solar activity is expected to remain
very low for the forecast period (25 - 27 May).
IIA. Geophysical Activity Summary 23-2100Z to 24-2100Z
The goemagnetic field was predominantly quiet, with one unsettled
period early in the day.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be mostly quiet for days 1 and 2 (25-26 May), becoming
unsettled on day 3 (27 May) with the return of a coronal hole high
speed stream.
III. Event Probabilities 25 May to 27 May
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 24 May 082 Predicted 25 May-27 May 082/082/082 90 Day Mean 24 May 108
V. Geomagnetic A Indices
Observed Afr/Ap 23 May 004/004 Estimated Afr/Ap 24 May 005/006 Predicted Afr/Ap 25 May-27 May 005/007-005/008-010/012
VI. Geomagnetic Activity Probabilities 25 May to 27 May
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 20% | 30% |
| Minor storm | 05% | 05% | 10% |
| Major-severe storm | 01% | 01% | 05% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 30% | 40% |
| Minor storm | 05% | 10% | 20% |
| Major-severe storm | 01% | 05% | 10% |
All times in UTC
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