Viewing archive of Wednesday, 17 January 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 Jan 17 2204 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 017 Issued at 2200Z on 17 Jan 2007IA. Analysis of Solar Active Regions and Activity from 16-2100Z to 17-2100Z Solar activity was very low.
IB. Solar Activity Forecast
Solar activity is expected to be very
low.
IIA. Geophysical Activity Summary 16-2100Z to 17-2100Z
The geomagnetic field was at unsettled to minor storm conditions.
Activity was due to the continued influence of a coronal hole high
speed stream. Solar wind speed at ACE has been elevated around 680
km/s. The greater than 2 MeV electron flux at geosynchronous orbit
reached high levels today.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be unsettled to active on 18 January. On 19 January,
mostly unsettled conditions are expected. By 20 January, conditions
are expected to decrease to quiet to unsettled levels.
III. Event Probabilities 18 Jan to 20 Jan
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 17 Jan 078 Predicted 18 Jan-20 Jan 080/080/075 90 Day Mean 17 Jan 084
V. Geomagnetic A Indices
Observed Afr/Ap 16 Jan 009/013 Estimated Afr/Ap 17 Jan 018/025 Predicted Afr/Ap 18 Jan-20 Jan 012/015-010/012-008/010
VI. Geomagnetic Activity Probabilities 18 Jan to 20 Jan
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 25% | 20% | 15% |
| Minor storm | 15% | 10% | 05% |
| Major-severe storm | 05% | 05% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 30% | 25% | 20% |
| Minor storm | 15% | 15% | 10% |
| Major-severe storm | 10% | 05% | 05% |
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