Today’s Space Weather Forecast Discussion (2017 Dec 07 1230 UTC)

Today's Space Weather Forecast Discussion - 2017 Dec 07 20:03 UTC

Here is the current forecast discussion on space weather and geophysical activity, issued 2017 Dec 07 1230 UTC.

Solar Activity

24 hr Summary: Solar activity continued at very low levels. Region 2690 (N07W23) decayed into a plage region. 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 (07-09 Dec).

Energetic Particle

24 hr Summary: The greater than 2 MeV electron flux was at normal to high levels today with a maximum flux of 3,260 pfu observed at 06/1735 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 of a positive polarity CH HSS. Solar wind speed decreased from approximately 635 km/s to near 525 km/s over the period. Total field ranged from 2 to 6 nT while the Bz component was between +3/-5 nT. Phi angle was oriented in a mostly positive solar sector.

Forecast: Solar wind parameters are expected to continue to be enhanced under a positive polarity CH HSS through day one. A slow return to nominal levels is expected on days two and three as HSS effects wane.


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

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

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Tomas Hood, NW7US, is a regular contributor to and writes from Nebraska, USA. Tomas is the Space Weather and Radio Propagation Contributing Editor to 'CQ Amateur Radio Magazine', 'The Spectrum Monitor', and 'RadioUser UK Magazine'.

3 Responses to “Today’s Space Weather Forecast Discussion (2017 Dec 07 1230 UTC)”

  • ve7sl Steve:

    Is it just my imagination or is Cycle 24 producing a lot more coronal hole disruptions in its dying days than have previous cycles? I don’t ever recall such a continual bombardment even though those cycles were much more robust than this one.

  • ve7sl Steve:

    It appears Tomas is too busy to respond to reader’s comments.

  • Steve,

    it is a very busy time of year with holidays, work, and a wife with some medical issues. I will answer. As soon as I come up for air.


    73 de NW7US

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