[Propagation+Space Weather] Today's Space Weather Forecast Discussion on 2021 Dec 09 1230 UTC

[nw7us@sunspotwatch.com]

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Here is the current forecast discussion on space weather and geophysical activity, issued 2021 Dec 09 1230 UTC.

Solar Activity

24 hr Summary: Solar activity was at very low levels with a spotless solar disk. No Earth-directed CMEs were observed in available coronagraph imagery.

Forecast: Solar activity is expected to be very low through 11 Dec.

Energetic Particle

24 hr Summary: The greater than 2 MeV electron flux reached moderate levels. The greater than 10 MeV proton flux maintained background levels.

Forecast: The greater than 2 MeV electron flux is expected to be at moderate levels through 11 Dec. The greater than 10 MeV proton flux is expected to continue at background levels.

Solar Wind

24 hr Summary: The solar wind environment returned to ambient-like, background conditions. Total field strength ranged from 2-4 nT, and the Bz component was unremarkable. Wind speeds decreased from near 450 km/s to ~350 km/s by the end of the period. The phi angle was predominantly in a positive solar sector.

Forecast: Minor enhancements are expected from a CME that will be passing mostly south of Earth on 10-11 Dec.

Geospace

24 hr Summary: The geomagnetic field was quiet.

Forecast: Mostly quiet levels are expected through 09 Dec. Unsettled and active levels become more likely on 10-11 Dec with a CME that will be passing close to Earth.

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