Viewing archive of Thursday, 10 February 2005
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 2005 Feb 10 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 041 Issued at 2200Z on 10 Feb 2005IA. Analysis of Solar Active Regions and Activity from 09-2100Z to 10-2100Z Solar activity was low. A C1.7 flare occurred from
Region 734 (S04E57) at 10/0010Z. New Region 735 (S08E74) was
numbered today.
IB. Solar Activity Forecast
Solar activity is expected to be very
low to low.
IIA. Geophysical Activity Summary 09-2100Z to 10-2100Z
The geomagnetic field was quiet to active. Solar wind speed at ACE
showed a decline from approximately 750 km/s to 650 km/s during the
reporting period. 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 quiet to active on 11 February. Expect quiet to
unsettled conditions on 12 and 13 February as the coronal hole
stream moves out of geoeffective position.
III. Event Probabilities 11 Feb to 13 Feb
| Class M | 10% | 10% | 10% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 10 Feb 114 Predicted 11 Feb-13 Feb 115/115/110 90 Day Mean 10 Feb 100
V. Geomagnetic A Indices
Observed Afr/Ap 09 Feb 014/025 Estimated Afr/Ap 10 Feb 010/016 Predicted Afr/Ap 11 Feb-13 Feb 008/012-008/012-008/010
VI. Geomagnetic Activity Probabilities 11 Feb to 13 Feb
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 20% | 20% | 20% |
| Minor storm | 10% | 10% | 10% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 25% | 25% | 25% |
| Minor storm | 15% | 15% | 10% |
| Major-severe storm | 05% | 05% | 05% |
All times in UTC
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