Viewing archive of Tuesday, 24 April 2007
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 2007 Apr 24 2203 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 114 Issued at 2200Z on 24 Apr 2007IA. Analysis of Solar Active Regions and Activity from 23-2100Z to 24-2100Z Solar activity was very low. The background solar
x-ray flux increased from below A-class to approximately A6 during
the past 24 hours and a bright emerging flux region has rotated onto
the east limb. However, no sunspots are visible in this region yet.
IB. Solar Activity Forecast
Solar activity is expected to be very
low. There is a slight chance for a C-class flare from the east
limb.
IIA. Geophysical Activity Summary 23-2100Z to 24-2100Z
The geomagnetic field was quiet. Solar wind speed remains slightly
elevated at approximately 440 km/s.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be quiet for the next three days (25 - 27 April).
III. Event Probabilities 25 Apr to 27 Apr
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | Green | ||
IV. Penticton 10.7 cm Flux
Observed 24 Apr 073 Predicted 25 Apr-27 Apr 075/075/075 90 Day Mean 24 Apr 074
V. Geomagnetic A Indices
Observed Afr/Ap 23 Apr 010/018 Estimated Afr/Ap 24 Apr 003/005 Predicted Afr/Ap 25 Apr-27 Apr 005/005-005/005-005/005
VI. Geomagnetic Activity Probabilities 25 Apr to 27 Apr
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 05% | 05% | 05% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 10% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
All times in UTC
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