[Propagation+Space Weather] Today's Space Weather Forecast Discussion on 2021 Dec 11 1230 UTC

[nw7us@sunspotwatch.com]

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Here is the current forecast discussion on space weather and geophysical activity, issued 2021 Dec 11 1230 UTC.

Solar Activity

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

Forecast: Solar activity is expected to continue at very low levels on 11-13 Dec.

Energetic Particle

24 hr Summary: The greater than 2 MeV electron flux reached high levels with a peak flux of 2,745 pfu observed at 10/1545 UTC. The greater than 10 MeV proton flux maintained background levels.

Forecast: The greater than 2 MeV electron flux is expected to be at moderate to high levels on 11-13 Dec. The greater than 10 MeV proton flux is expected to continue at background levels.

Solar Wind

24 hr Summary: Solar wind parameters showed a minor increase in total field to 9 nT after 10/1630 UTC. The Bz component was as far south as -8 while solar wind speed ranged from 300-330 km/s. Phi angle was mostly negative.

Forecast: Minor field increases are likely to continue through 11 Dec. Further enhancements are expected on 12-13 Dec due to the onset of a negative polarity CH HSS.

Geospace

24 hr Summary: The geomagnetic field was quiet to unsettled.

Forecast: Quiet to unsettled levels are expected on 11-13 Dec due to a combination of possible weak CME effects and a negative polarity CH HSS.

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