Viewing archive of Saturday, 9 February 2013
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 2013 Feb 09 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 40 Issued at 2200Z on 09 Feb 2013IA. Analysis of Solar Active Regions and Activity from 08-2100Z to 09-2100Z Solar activity has been at low levels for the past 24 hours.
The largest solar event of the period was a C2 event observed at
09/0640Z. There are currently 3 numbered sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be at low
levels on days one, two, and three (10 Feb, 11 Feb, 12 Feb).
IIA. Geophysical Activity Summary 08-2100Z to 09-2100Z
The geomagnetic
field has been at quiet levels for the past 24 hours. Solar wind speed,
as measured by the ACE spacecraft, reached a peak speed of 487 km/s at
09/0319Z. Total IMF reached 6.5 nT at 09/0114Z. The maximum southward
component of Bz reached -3.4 nT at 09/0322Z.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet on days 1 and 2 (10-11 Feb) and quiet to unsettled levels
for day 3 (12 Feb).
III. Event Probabilities 10 Feb to 12 Feb
| Class M | 10% | 10% | 10% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 09 Feb 108 Predicted 10 Feb-12 Feb 110/105/105 90 Day Mean 09 Feb 119
V. Geomagnetic A Indices
Observed Afr/Ap 08 Feb 008/008 Estimated Afr/Ap 09 Feb 004/004 Predicted Afr/Ap 10 Feb-12 Feb 005/005-005/005-008/008
VI. Geomagnetic Activity Probabilities 10 Feb to 12 Feb
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 05% | 10% | 10% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 15% | 15% | 15% |
| Major-severe storm | 05% | 10% | 10% |
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