[Propagation+Space Weather] Today's Space Weather Forecast Discussion on 2019 Jul 20 1230 UTC

[nw7us@sunspotwatch.com]

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Here is the current forecast discussion on space weather and geophysical activity, issued 2019 Jul 20 1230 UTC.

Solar Activity

24 hr Summary: Solar activity remained very low with a spotless visible disk. No Earth-directed CMEs were observed in available coronagraph imagery.

Forecast: Solar activity is expected to remain very low on 20-22 Jul.

Energetic Particles

24 hr Summary: The greater than 2 MeV electron flux was at moderate to high levels with a maximum flux of 1,824 pfu observed at 19/1835 UTC. The greater than 10 MeV proton flux continued at background values.

Forecast: The greater than 2 MeV electron flux is expected to reach moderate to high levels on 20 Jul, decreasing to normal to moderate levels on 21-22 Jul. The greater than 10 MeV proton flux is expected to remain at background levels.

Solar Wind

24 hr Summary: Solar wind parameters, as measured by the ACE spacecraft, indicated nominal conditions. Total magnetic field strength was below 5 nT. Solar wind speeds were between 315-360 km/s. Phi angle was variable.

Forecast: Weak enhancements in solar wind conditions are likely on 20 Jul and 22 Jul in response to influence from multiple, small, negative polarity coronal holes.

Geospace

24 hr Summary: The geomagnetic field was quiet.

Forecast: The geomagnetic field is expected to be at mostly quiet to isolated unsettled levels for 20 and 22 Jul due to influence from multiple, weak, negative polarity CH HSSs.

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