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

[nw7us@sunspotwatch.com]

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

Solar Activity

24 hr Summary: Solar activity continued at very low levels under a spotless solar disk. No Earth-directed CMEs were observed.

Forecast: Solar activity is expected to be at very low levels on 20-22 Sep.

Energetic Particle

24 hr Summary: The greater than 2 MeV electron flux remained at moderate levels. The greater than 10 MeV proton flux was at background levels.

Forecast: The greater than 2 MeV electron flux is expected to be at normal to moderate levels on 20-22 Sep. The greater than 10 MeV proton flux is expected to continue at background levels.

Solar Wind

24 hr Summary: Solar wind parameters persisted near background levels throughout the period. Wind speeds began the period near 380 km/s before decreasing to end the period at ~325 km/s. Total field averaged near 4 nT, and the Bz component was +/-2 nT. Phi angle alternated between both a positive and a negative orientation, spending several hours at a time in each.

Forecast: Solar wind parameters are expected to remain near background levels on 20-21 Sep. Influence from an anticipated -CH HSS is expected to begin on 22 Sep. Solar wind speed is expected to be in excess of 500 km/s with an increase in density prior to the onset of increased speeds.

Geospace

24 hr Summary: The geomagnetic field was quiet.

Forecast: The geomagnetic field is expected to be at mostly quiet levels on 20-21 Sep. Quiet to unsettled conditions are forecast for 22 Sep due to anticipated -CH HSS activity.

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Live data: SunSpotWatch.com

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