Viewing archive of Monday, 12 August 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 Aug 12 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 224 Issued at 2200Z on 12 Aug 2013IA. Analysis of Solar Active Regions and Activity from 11-2100Z to 12-2100Z Solar activity has been at moderate levels for the past 24
hours. The largest solar event of the period was a M1 event observed at
12/1041Z from Region 1817 (S23E07). There are currently 5 numbered
sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be low with
a chance for M-class flares on days one, two, and three (13 Aug, 14 Aug,
15 Aug).
IIA. Geophysical Activity Summary 11-2100Z to 12-2100Z
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 412 km/s at
11/2148Z. Total IMF reached 7 nT at 12/2042Z. The maximum southward
component of Bz reached -7 nT at 12/2041Z. Electrons greater than 2 MeV
at geosynchronous orbit reached a peak level of 783 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet levels on days one and two (13 Aug, 14 Aug) and quiet to
unsettled levels on day three (15 Aug).
III. Event Probabilities 13 Aug to 15 Aug
| Class M | 30% | 30% | 30% |
| Class X | 05% | 05% | 05% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 12 Aug 114 Predicted 13 Aug-15 Aug 115/120/120 90 Day Mean 12 Aug 114
V. Geomagnetic A Indices
Observed Afr/Ap 11 Aug 007/005 Estimated Afr/Ap 12 Aug 004/005 Predicted Afr/Ap 13 Aug-15 Aug 007/008-006/005-009/010
VI. Geomagnetic Activity Probabilities 13 Aug to 15 Aug
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 05% | 15% |
| Minor storm | 05% | 01% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 20% | 15% | 25% |
| Major-severe storm | 20% | 05% | 25% |
All times in UTC
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