[Propagation+Space Weather] Today's Space Weather Forecast Discussion on 2020 Dec 19 1230 UTC

[nw7us@sunspotwatch.com]

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Here is the current forecast discussion on space weather and geophysical activity, issued 2020 Dec 19 1230 UTC.

Solar Activity

24 hr Summary: Solar activity was very low. No active regions with sunspots were observed and no Earth-directed CMEs were detected in available coronagraph imagery.

Forecast: Solar activity is expected to be very low over 19-21 Dec.

Energetic Particle

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

Forecast: The greater than 2 MeV electron flux is expected to be normal to moderate on 19-21 Dec, while the greater than 10 MeV proton flux is expected to continue at background levels.

Solar Wind

24 hr Summary: Solar wind parameters reflected a nominal solar wind regime this period. The solar wind speed was steady near 300 km/s through most of the period, before beginning a slow increase to around 350 km/s after 19/0800 UTC. Total field strength values varied between 2-10 nT and Bz reached a maximum value of -8 nT late in the period.

Forecast: Solar wind parameters are expected to continue at nominal levels through midday on 21 Dec. After midday, solar wind parameters are expected to become enhanced due to the influence of a positive polarity CH HSS.

Geospace

24 hr Summary: The geomagnetic field was quiet.

Forecast: The geomagnetic field is expected to be mostly quiet through midday on 21 Dec. After midday on 21 Dec, unsettled to active conditions are expected due to the influence of a positive polarity CH HSS.

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Live data: SunSpotWatch.com

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