Viewing archive of Friday, 22 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 22 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 53 Issued at 2200Z on 22 Feb 2013IA. Analysis of Solar Active Regions and Activity from 21-2100Z to 22-2100Z Solar activity has been at low levels for the past 24 hours.
The largest solar event of the period was a C1 event observed at
22/1222Z from Region 1678 (N10W80). There are currently 6 numbered
sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is likely to be low with a
slight chance for an M-class flare on day one (23 Feb) and expected to
be very low with a chance for a C-class flares on days two and three (24
Feb, 25 Feb).
IIA. Geophysical Activity Summary 21-2100Z to 22-2100Z
The geomagnetic
field has been at quiet to unsettled levels for the past 24 hours. Solar
wind speed, as measured by the ACE spacecraft, reached a peak speed of
433 km/s at 22/0435Z. Total IMF reached 6 nT at 21/2321Z. The maximum
southward component of Bz reached -6 nT at 21/2138Z.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to unsettled levels on days one and two (23 Feb, 24 Feb)
and quiet levels on day three (25 Feb).
III. Event Probabilities 23 Feb to 25 Feb
| Class M | 15% | 05% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 22 Feb 107 Predicted 23 Feb-25 Feb 105/100/095 90 Day Mean 22 Feb 115
V. Geomagnetic A Indices
Observed Afr/Ap 21 Feb 005/005 Estimated Afr/Ap 22 Feb 007/009 Predicted Afr/Ap 23 Feb-25 Feb 010/010-007/008-005/005
VI. Geomagnetic Activity Probabilities 23 Feb to 25 Feb
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 20% | 15% | 10% |
| Minor storm | 05% | 05% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 20% | 15% | 15% |
| Minor storm | 30% | 20% | 15% |
| Major-severe storm | 25% | 20% | 10% |
All times in UTC
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