Viewing archive of Monday, 27 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 27 2203 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 239 Issued at 2200Z on 27 Aug 2007IA. Analysis of Solar Active Regions and Activity from 26-2100Z to 27-2100Z Solar activity was very low.
IB. Solar Activity Forecast
Solar activity is expected to be very
low.
IIA. Geophysical Activity Summary 26-2100Z to 27-2100Z
The geomagnetic field ranged from quiet to active levels. Solar wind
speed increased to approximately 670 km/s due to a coronal hole high
speed stream.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be quiet to unsettled with possible active periods on 28
August due to the coronal hole high speed stream. Quiet to
unsettled conditions are expected on 29 - 30 August.
III. Event Probabilities 28 Aug to 30 Aug
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | Green | ||
IV. Penticton 10.7 cm Flux
Observed 27 Aug 069 Predicted 28 Aug-30 Aug 070/070/070 90 Day Mean 27 Aug 072
V. Geomagnetic A Indices
Observed Afr/Ap 26 Aug 010/010 Estimated Afr/Ap 27 Aug 008/015 Predicted Afr/Ap 28 Aug-30 Aug 008/008-005/005-005/005
VI. Geomagnetic Activity Probabilities 28 Aug to 30 Aug
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 10% | 10% |
| Minor storm | 05% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 20% | 15% | 15% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
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