Viewing archive of Friday, 15 February 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 Feb 15 2203 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 046 Issued at 2200Z on 15 Feb 2008IA. Analysis of Solar Active Regions and Activity from 14-2100Z to 15-2100Z Solar activity was very low. The visible solar disk
remains spotless. A slow-moving CME, apparently from the backside,
was observed on the east limb at approximately 15/0530Z.
IB. Solar Activity Forecast
Solar activity is expected to be very
low.
IIA. Geophysical Activity Summary 14-2100Z to 15-2100Z
The geomagnetic field was predominately quiet to unsettled due to a
geoeffective coronal hole high speed stream. Solar wind speed
remains in excess of 600 km/s. The greater than 2 MeV electron flux
at geosynchronous orbit reached high levels again today.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be quiet to unsettled with the possibility of isolated
active periods for 16 February. The geomagnetic field is expected
to abate to quiet for 17 - 18 February as the coronal hole high
speed stream rotates from its geoeffective position.
III. Event Probabilities 16 Feb to 18 Feb
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | Green | ||
IV. Penticton 10.7 cm Flux
Observed 15 Feb 070 Predicted 16 Feb-18 Feb 072/072/072 90 Day Mean 15 Feb 075
V. Geomagnetic A Indices
Observed Afr/Ap 14 Feb 010/015 Estimated Afr/Ap 15 Feb 008/012 Predicted Afr/Ap 16 Feb-18 Feb 008/010-005/005-005/005
VI. Geomagnetic Activity Probabilities 16 Feb to 18 Feb
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 35% | 30% | 15% |
| Minor storm | 10% | 05% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 40% | 35% | 15% |
| Minor storm | 15% | 10% | 05% |
| Major-severe storm | 05% | 05% | 01% |
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