[Propagation+Space Weather] Today's Space Weather Forecast Discussion on 2019 Jul 18 1230 UTC

[nw7us@sunspotwatch.com]

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Here is the current forecast discussion on space weather and geophysical activity, issued 2019 Jul 18 1230 UTC.

Solar Activity

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

Forecast: Solar activity is expected to remain very low 18-20 Jul.

Energetic Particle

24 hr Summary: The greater than 2 MeV electron flux reached high levels. The greater than 10 MeV proton flux remained at background values.

Forecast: The greater than 2 MeV electron flux is expected to continue at moderate to high levels 18-19 Jul before decreasing to normal to moderate levels on 20 Jul as solar wind speeds decrease. The greater than 10 MeV proton flux is expected to continue at background levels all three days.

Solar Wind

24 hr Summary: Solar wind parameters reflected a return to near background conditions. Solar wind speeds decreased from ~450 km/s to near 395 km/s, total field strength averaged near 4 nT, and the Bz component averaged around +/- 3 nT. The phi angle was positive until 17/1800 UTC when it shifted into a negative position, then rotated back to positive after 18/0842 UTC.

Forecast: The solar wind environment is anticipated to remain at mostly background levels on 18-20 Jul, with a chance for isolated minor enhancements, due weak influences from CH HSS proximity.

Geospace

24 hr Summary: The geomagnetic field was quiet.

Forecast: The geomagnetic field is expected to remain mostly quiet, with a chance for occasional unsettled conditions, on 18-20 Jul in response to isolated enhancements in the solar wind.

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Live data: SunSpotWatch.com

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