Viewing archive of Sunday, 13 August 2017
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 2017 Aug 13 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 225 Issued at 2200Z on 13 Aug 2017IA. Analysis of Solar Active Regions and Activity from 12-2100Z to 13-2100Z Solar activity has been at very low levels for the past 24
hours. There is currently 1 numbered sunspot region on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be very low
on days one, two, and three (14 Aug, 15 Aug, 16 Aug).
IIA. Geophysical Activity Summary 12-2100Z to 13-2100Z
The geomagnetic
field has been at quiet to unsettled levels for the past 24 hours. Solar
wind speed reached a peak of 771 km/s at 12/2146Z. Total IMF reached 6
nT at 12/2357Z. The maximum southward component of Bz reached -4 nT at
13/0537Z. Electrons greater than 2 MeV at geosynchronous orbit reached a
peak level of 978 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to unsettled levels on days one and three (14 Aug, 16
Aug) and quiet levels on day two (15 Aug).
III. Event Probabilities 14 Aug to 16 Aug
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 13 Aug 068 Predicted 14 Aug-16 Aug 068/068/068 90 Day Mean 13 Aug 076
V. Geomagnetic A Indices
Observed Afr/Ap 12 Aug 012/013 Estimated Afr/Ap 13 Aug 007/008 Predicted Afr/Ap 14 Aug-16 Aug 009/008-006/005-007/010
VI. Geomagnetic Activity Probabilities 14 Aug to 16 Aug
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 10% | 20% |
| Minor storm | 05% | 01% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 25% | 20% | 25% |
| Major-severe storm | 25% | 20% | 25% |
All times in UTC
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