Viewing archive of Thursday, 18 February 2010
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 2010 Feb 18 2201 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 049 Issued at 2200Z on 18 Feb 2010IA. Analysis of Solar Active Regions and Activity from 17-2100Z to 18-2100Z Solar activity was very low. Isolated B-class flares
occurred during the period.
IB. Solar Activity Forecast
Solar activity is expected to be at
predominately very low levels. There is a chance for an isolated
C-class flare.
IIA. Geophysical Activity Summary 17-2100Z to 18-2100Z
Geomagnetic field activity was at quiet to unsettled levels.
IIB. Geophysical Activity Forecast
Geomagnetic field activity is
expected to be at quiet to unsettled levels with a chance for active
levels during day 1 (19 February). Activity is expected to decrease
to mostly quiet levels on days 2 - 3 (20 - 21 February).
III. Event Probabilities 19 Feb to 21 Feb
| Class M | 05% | 05% | 05% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 18 Feb 085 Predicted 19 Feb-21 Feb 085/085/084 90 Day Mean 18 Feb 080
V. Geomagnetic A Indices
Observed Afr/Ap 17 Feb 002/004 Estimated Afr/Ap 18 Feb 007/012 Predicted Afr/Ap 19 Feb-21 Feb 010/010-005/005-005/005
VI. Geomagnetic Activity Probabilities 19 Feb to 21 Feb
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 25% | 15% | 10% |
| Minor storm | 10% | 05% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 30% | 20% | 15% |
| Minor storm | 15% | 10% | 05% |
| Major-severe storm | 01% | 01% | 01% |
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