[Propagation+Space Weather] Today's Space Weather Forecast Discussion on 2017 Dec 08 1230 UTC

[nw7us@sunspotwatch.com]

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Here is the current forecast discussion on space weather and geophysical activity, issued 2017 Dec 08 1230 UTC.

Solar Activity

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

Forecast: Solar activity is expected to continue at very low levels over the next three days (08-10 Dec).

Energetic Particle

24 hr Summary: The greater than 2 MeV electron flux was at moderate to high levels today with a maximum flux of 3,752 pfu observed at 07/1455 UTC. The greater than 10 MeV proton flux was at background levels.

Forecast: The greater than 2 MeV electron flux is expected to be at moderate to high levels for the next three days due to CH HSS influence. The greater than 10 MeV proton flux is expected to continue at background levels for the forecast period.

Solar Wind

24 hr Summary: Solar wind parameters indicated the continued influence from a positive polarity, polar-connected, CH HSS. Solar wind speed gradually decreased from 550 km/s to 450 km/s. Total field ranged from 2-6 nT while the Bz component was between +3/-5 nT. Phi angle was mostly oriented in a positive solar sector.

Forecast: Solar wind speed is expected to slowly wane on day one as CH HSS influence diminishes. A return to nominal levels is expected on days two and three.

Geospace

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

Forecast: The geomagnetic field is expected to be at quiet to unsettled levels on day one as CH HSS effects diminish. Mostly quiet levels are expected on days two and three.

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