[Propagation+Space Weather] Today's Space Weather Forecast Discussion on 2018 Sep 20 1230 UTC

[nw7us@sunspotwatch.com]

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Here is the current forecast discussion on space weather and geophysical activity, issued 2018 Sep 20 1230 UTC.

Solar Activity

24 hr Summary: Solar activity was at very low levels. There were no numbered regions and no Earth-directed CMEs were observed in available coronagraph imagery.

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

Energetic Particles

24 hr Summary: The greater than 2 MeV electron flux reached high levels this period with a peak flux of 8,690 pfu. The greater than 10 MeV proton flux was steady at background levels throughout the period.

Forecast: The greater than 2 MeV electron flux is expected to reach high levels on 20-22 Sep and the greater than 10 MeV proton flux is expected to persist at background levels throughout the period.

Solar Wind

24 hr Summary: The total field was steady around 3 nT throughout the period with only minor deflections in Bz. Solar wind speeds have continued a declining trend this period and were last around 365 km/s. The phi angle was mostly negative.

Forecast: Solar wind parameters are expected to be at nominal levels on 20-21 Sep. The solar wind environment is expected to become enhanced on 22 Sep with the arrival of a recurrent, positive polarity CH HSS.

Geospace

24 hr Summary: The geomagnetic field was at quiet levels.

Forecast: The geomagnetic field is expected to be at mostly quiet levels on 20-21 Sep. Active levels are anticipated on 22 Sep as a result of a recurrent, positive polarity CH HSS. There is also a chance for G1 (Minor) storming on 22 Sep.

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Live data: SunSpotWatch.com

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