Viewing archive of Thursday, 27 April 2006
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 2006 Apr 27 2203 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 117 Issued at 2200Z on 27 Apr 2006IA. Analysis of Solar Active Regions and Activity from 26-2100Z to 27-2100Z Solar activity was high. Region 875 (S11E20) produced
an M7/1N flare at 27/1552 UTC. The flare was highly impulsive; no
associated radio sweeps were observed and no proton events are
expected.
IB. Solar Activity Forecast
Solar activity is expected to be low
to moderate. Further M-class flares are possible from Region 875.
IIA. Geophysical Activity Summary 26-2100Z to 27-2100Z
The geomagnetic field has been quiet to unsettled.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be quiet to unsettled.
III. Event Probabilities 28 Apr to 30 Apr
| Class M | 30% | 30% | 30% |
| Class X | 05% | 05% | 05% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 27 Apr 101 Predicted 28 Apr-30 Apr 100/100/100 90 Day Mean 27 Apr 080
V. Geomagnetic A Indices
Observed Afr/Ap 26 Apr 002/005 Estimated Afr/Ap 27 Apr 004/005 Predicted Afr/Ap 28 Apr-30 Apr 003/005-003/005-003/005
VI. Geomagnetic Activity Probabilities 28 Apr to 30 Apr
| 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 | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
All times in UTC
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