[Propagation+Space Weather] Today's Space Weather Forecast Discussion on 2019 Jul 21 1230 UTC

[nw7us@sunspotwatch.com]

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Here is the current forecast discussion on space weather and geophysical activity, issued 2019 Jul 21 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 21-23 Jul.

Energetic Particles

24 hr Summary: The greater than 2 MeV electron flux was at moderate to high levels with a maximum flux of 1,846 pfu observed at 20/1815 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 21 Jul, decreasing to normal to moderate levels on 22-23 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. Solar winds speeds were between 315-360 km/s. Total magnetic field strength ranged from 3-5 nT. Phi angle was predominantly oriented in the positive sector after 20/1320 UTC.

Forecast: Mostly nominal wind parameters are expected until early on 23 Jul, when mild influence from a negative polarity CH HSS is anticipated.

Geospace

24 hr Summary: The geomagnetic field was quiet.

Forecast: The geomagnetic field is expected to persist at quiet levels on 21-22 Jul. Unsettled conditions are likely on 23 Jul in response to weak influence from a negative polarity CH HSS.

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Live data: SunSpotWatch.com

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