Viewing archive of Friday, 26 October 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 Oct 26 2203 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 299 Issued at 2200Z on 26 Oct 2007IA. Analysis of Solar Active Regions and Activity from 25-2100Z to 26-2100Z Solar activity was very low.
IB. Solar Activity Forecast
Solar activity is expected to be very
low.
IIA. Geophysical Activity Summary 25-2100Z to 26-2100Z
The geomagnetic field ranged from quiet to active conditions. The
solar wind data observed at the ACE spacecraft indicates the
presence of the coronal hole high speed wind stream. Speeds have
averaged around 670 km/s with Bz fluctuations between +/- 4 nT.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be predominately unsettled with isolated active
conditions due to the influence of the coronal hole high speed
stream.
III. Event Probabilities 27 Oct to 29 Oct
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | Green | ||
IV. Penticton 10.7 cm Flux
Observed 26 Oct 068 Predicted 27 Oct-29 Oct 067/067/067 90 Day Mean 26 Oct 067
V. Geomagnetic A Indices
Observed Afr/Ap 25 Oct 010/020 Estimated Afr/Ap 26 Oct 015/020 Predicted Afr/Ap 27 Oct-29 Oct 010/012-008/010-010/015
VI. Geomagnetic Activity Probabilities 27 Oct to 29 Oct
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 20% | 15% | 20% |
| Minor storm | 15% | 10% | 15% |
| Major-severe storm | 05% | 01% | 05% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 25% | 20% | 25% |
| Minor storm | 20% | 15% | 20% |
| Major-severe storm | 05% | 01% | 05% |
All times in UTC
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