Viewing archive of Monday, 20 August 2018
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 2018 Aug 20 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 232 Issued at 2200Z on 20 Aug 2018IA. Analysis of Solar Active Regions and Activity from 19-2100Z to 20-2100Z Solar activity has been at very low levels for the past 24
hours. There are currently 1 numbered sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be very low
on days one, two, and three (21 Aug, 22 Aug, 23 Aug).
IIA. Geophysical Activity Summary 19-2100Z to 20-2100Z
The geomagnetic
field has been at quiet to active levels for the past 24 hours. Solar
wind speed reached a peak of 708 km/s at 20/1717Z. Total IMF reached 13
nT at 20/0310Z. The maximum southward component of Bz reached -8 nT at
20/0226Z. Electrons greater than 2 MeV at geosynchronous orbit reached a
peak level of 14785 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at unsettled to active levels on day one (21 Aug) and quiet to
active levels on days two and three (22 Aug, 23 Aug).
III. Event Probabilities 21 Aug to 23 Aug
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 20 Aug 068 Predicted 21 Aug-23 Aug 068/070/070 90 Day Mean 20 Aug 071
V. Geomagnetic A Indices
Observed Afr/Ap 19 Aug 008/009 Estimated Afr/Ap 20 Aug 013/018 Predicted Afr/Ap 21 Aug-23 Aug 014/018-010/012-010/012
VI. Geomagnetic Activity Probabilities 21 Aug to 23 Aug
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 35% | 30% | 30% |
| Minor storm | 15% | 10% | 10% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 10% | 15% | 15% |
| Minor storm | 25% | 30% | 30% |
| Major-severe storm | 50% | 40% | 40% |
All times in UTC
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