Viewing archive of Saturday, 25 August 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 Aug 25 2203 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 237 Issued at 2200Z on 25 Aug 2007IA. Analysis of Solar Active Regions and Activity from 24-2100Z to 25-2100Z Solar activity was very low.
IB. Solar Activity Forecast
Solar activity is expected to be very
low to low. Region 969 (S05E22) could produce an isolated C-class
event.
IIA. Geophysical Activity Summary 24-2100Z to 25-2100Z
The geomagnetic field was at quiet to unsettled levels.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be quiet to unsettled, with isolated periods of active
conditions. The increase in activity levels is expected due to a
favorably positioned coronal hole.
III. Event Probabilities 26 Aug to 28 Aug
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | Green | ||
IV. Penticton 10.7 cm Flux
Observed 25 Aug 072 Predicted 26 Aug-28 Aug 070/070/070 90 Day Mean 25 Aug 072
V. Geomagnetic A Indices
Observed Afr/Ap 24 Aug 001/002 Estimated Afr/Ap 25 Aug 008/012 Predicted Afr/Ap 26 Aug-28 Aug 010/015-008/012-008/008
VI. Geomagnetic Activity Probabilities 26 Aug to 28 Aug
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 20% | 15% | 15% |
| Minor storm | 10% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 25% | 20% | 20% |
| Minor storm | 15% | 10% | 10% |
| Major-severe storm | 05% | 05% | 01% |
All times in UTC
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