Viewing archive of Sunday, 17 August 2008
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 2008 Aug 17 2201 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 230 Issued at 2200Z on 17 Aug 2008IA. Analysis of Solar Active Regions and Activity from 16-2100Z to 17-2100Z Solar activity was very low. No flares occurred during
the past 24 hours and the solar disk continues to be spotless.
IB. Solar Activity Forecast
Solar activity is expected to be very
low for the next three days (18-20 August).
IIA. Geophysical Activity Summary 16-2100Z to 17-2100Z
The geomagnetic field was quiet to unsettled during the past 24
hours.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be quiet to unsettled with isolated active periods for
the next three days (18-20 August). The increase is in response to a
recurrent coronal hole high speed stream.
III. Event Probabilities 18 Aug to 20 Aug
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | Green | ||
IV. Penticton 10.7 cm Flux
Observed 17 Aug 067 Predicted 18 Aug-20 Aug 066/066/066 90 Day Mean 17 Aug 066
V. Geomagnetic A Indices
Observed Afr/Ap 16 Aug 004/005 Estimated Afr/Ap 17 Aug 007/008 Predicted Afr/Ap 18 Aug-20 Aug 010/010-012/015-007/010
VI. Geomagnetic Activity Probabilities 18 Aug to 20 Aug
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 30% | 35% | 15% |
| Minor storm | 10% | 10% | 05% |
| Major-severe storm | 05% | 05% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 50% | 55% | 20% |
| Minor storm | 15% | 20% | 10% |
| Major-severe storm | 10% | 10% | 05% |
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