Viewing archive of Sunday, 22 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 22 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 142 Issued at 2200Z on 22 May 2011IA. Analysis of Solar Active Regions and Activity from 21-2100Z to 22-2100Z Solar activity was very low. All spotted regions on
the visible disk were small, magnetically simple and generally
quiescent. New Region 1220 (N14W65) emerged today as a small
bipolar group.
IB. Solar Activity Forecast
Solar activity is expected to be very
low for the next three days (23-25 May) with a slight chance for a
C-class event on day one (23 May).
IIA. Geophysical Activity Summary 21-2100Z to 22-2100Z
The geomagnetic field was quiet.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to remain predominantly quiet for the next three days.
III. Event Probabilities 23 May to 25 May
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 22 May 085 Predicted 23 May-25 May 085/085/085 90 Day Mean 22 May 108
V. Geomagnetic A Indices
Observed Afr/Ap 21 May 004/004 Estimated Afr/Ap 22 May 005/005 Predicted Afr/Ap 23 May-25 May 005/005-005/005-005/005
VI. Geomagnetic Activity Probabilities 23 May to 25 May
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 15% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
All times in UTC
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