Viewing archive of Saturday, 13 July 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 Jul 13 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 194 Issued at 2200Z on 13 Jul 2013IA. Analysis of Solar Active Regions and Activity from 12-2100Z to 13-2100Z 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
12/2233Z from Region 1787 (S13W49). There are currently 4 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 (14 Jul) and expected to
be very low with a chance for a C-class flares on days two and three (15
Jul, 16 Jul).
IIA. Geophysical Activity Summary 12-2100Z to 13-2100Z
The geomagnetic
field has been at quiet to active levels for the past 24 hours. Solar
wind speed, as measured by the ACE spacecraft, reached a peak speed of
565 km/s at 12/2242Z. Total IMF reached 16 nT at 13/1339Z. The maximum
southward component of Bz reached -6 nT at 12/2254Z. Electrons greater
than 2 MeV at geosynchronous orbit reached a peak level of 16728 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to minor storm levels on day one (14 Jul), quiet to
active levels on day two (15 Jul) and quiet levels on day three (16
Jul).
III. Event Probabilities 14 Jul to 16 Jul
| Class M | 10% | 05% | 05% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 13 Jul 114 Predicted 14 Jul-16 Jul 110/105/110 90 Day Mean 13 Jul 121
V. Geomagnetic A Indices
Observed Afr/Ap 12 Jul 009/013 Estimated Afr/Ap 13 Jul 011/014 Predicted Afr/Ap 14 Jul-16 Jul 018/025-010/012-007/008
VI. Geomagnetic Activity Probabilities 14 Jul to 16 Jul
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 35% | 30% | 10% |
| Minor storm | 30% | 15% | 01% |
| Major-severe storm | 05% | 05% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 10% | 15% | 15% |
| Minor storm | 25% | 30% | 20% |
| Major-severe storm | 65% | 50% | 10% |
All times in UTC
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