Viewing archive of Thursday, 16 February 2006
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 2006 Feb 16 2203 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 047 Issued at 2200Z on 16 Feb 2006IA. Analysis of Solar Active Regions and Activity from 15-2100Z to 16-2100Z Solar activity remains at very low levels. Developing
Region 854 (S07E10) appears to have stabilized as a small D-type
sunspot group with very little flare potential. A prominence erupted
early in the period off the southwest limb near S38, but no
geomagnetic response is expected. New Region 855 (N06E28) was
numbered today.
IB. Solar Activity Forecast
Solar activity is expected to continue
at very low levels.
IIA. Geophysical Activity Summary 15-2100Z to 16-2100Z
The geomagnetic field was quiet to unsettled with isolated active
conditions during the first half of the period. Solar wind speed was
elevated to near 600 km/s, but declined to near 450 km/s by the end
of the period.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be quiet to unsettled on 17 and 18 Feb. A coronal hole
high speed stream is expected to rotate into a geoeffective position
on 19 February and produce occasional active periods.
III. Event Probabilities 17 Feb to 19 Feb
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 16 Feb 079 Predicted 17 Feb-19 Feb 080/080/080 90 Day Mean 16 Feb 085
V. Geomagnetic A Indices
Observed Afr/Ap 15 Feb 007/012 Estimated Afr/Ap 16 Feb 010/010 Predicted Afr/Ap 17 Feb-19 Feb 005/005-005/005-010/012
VI. Geomagnetic Activity Probabilities 17 Feb to 19 Feb
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 25% |
| Minor storm | 01% | 01% | 10% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 20% | 20% | 30% |
| Minor storm | 05% | 05% | 15% |
| Major-severe storm | 01% | 01% | 05% |
All times in UTC
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