Viewing archive of Tuesday, 25 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 25 2203 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 115 Issued at 2200Z on 25 Apr 2006IA. Analysis of Solar Active Regions and Activity from 24-2100Z to 25-2100Z Solar activity was low. Region 875 (S10E46), a beta
gamma delta magnetic group, produced a long duration C1 flare at
25/0726 UTC. An associated CME was observed in LASCO imagery off the
east limb with a speed of approximately 520 Km/s. This CME is not
expected to be geoeffective.
IB. Solar Activity Forecast
Solar activity is expected to be very
low to low. An isolated M-class flare is possible from Region 875.
IIA. Geophysical Activity Summary 24-2100Z to 25-2100Z
The geomagnetic field was mostly quiet.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be mostly quiet.
III. Event Probabilities 26 Apr to 28 Apr
| Class M | 15% | 15% | 15% |
| Class X | 05% | 05% | 05% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 25 Apr 095 Predicted 26 Apr-28 Apr 095/095/095 90 Day Mean 25 Apr 079
V. Geomagnetic A Indices
Observed Afr/Ap 24 Apr 004/007 Estimated Afr/Ap 25 Apr 005/005 Predicted Afr/Ap 26 Apr-28 Apr 005/005-005/005-003/005
VI. Geomagnetic Activity Probabilities 26 Apr to 28 Apr
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 10% |
| 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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