[Propagation+Space Weather] Today's Space Weather Forecast Discussion on 2018 Aug 18 1230 UTC

[nw7us@sunspotwatch.com]

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Here is the current forecast discussion on space weather and geophysical activity, issued 2018 Aug 18 1230 UTC.

Solar Activity

24 hr Summary: Solar activity was very low. Region 2718 (S07E04, Hrx/alpha) remained unchanged from the previous period. No Earth-directed CMEs were observed in available coronagraph imagery.

Forecast: Solar activity is expected to be very low on 18-20 Aug.

Energetic Particle

24 hr Summary: The greater than 2 MeV electron flux reached moderate levels and the greater than 10 MeV proton flux continued at background values.

Forecast: The greater than 2 MeV electron flux is expected to reach moderate levels on 18-20 Aug. The greater than 10 MeV proton flux is expected to remain at background levels throughout the forecast period.

Solar Wind

24 hr Summary: Solar wind parameters reflected the waning influence of a positive polarity CH HSS.

Forecast: Solar wind parameters are expected to slowly return to near-background levels over 18-19 Aug as positive polarity CH HSS influence wanes. An enhancement in total field strength and wind speeds from a negative polarity CH HSS is expected on 20 Aug.

Geospace

24 hr Summary: The geomagnetic field reached active levels due to the waning influence of a positive polarity CH HSS.

Forecast: The geomagnetic field is expected to be quiet and unsettled for the remainder of 18 Aug and generally quiet conditions are expected on 19 Aug as CH HSS influence wanes and subsides. Unsettled and active conditions are expected on 20 Aug due to the influence of a negative polarity CH HSS.

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