[Propagation+Space Weather] Today's Space Weather Forecast Discussion on 2018 Dec 31 1230 UTC

[nw7us@sunspotwatch.com]

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Here is the current forecast discussion on space weather and geophysical activity, issued 2018 Dec 31 1230 UTC.

Solar Activity

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

Forecast: Solar activity is expected to persist at very low levels over 31 Dec-02 Jan.

Energetic Particle

24 hr Summary: The greater than 2 MeV electron flux reached high levels with a peak flux of 4,040 pfu observed at 30/1930 UTC. The greater than 10 MeV proton flux was steady at background levels.

Forecast: The greater than 2 MeV electron flux is expected to reach high levels on 31 Dec-02 Jan and the greater than 10 MeV proton flux is expected to persist at background levels.

Solar Wind

24 hr Summary: Solar wind parameters remained elevated this period under continued, but weakening (+)CH HSS influence.

Forecast: Solar wind parameters are expected to decrease to near-background levels over 31 Dec-02 Jan as CH HSS influence subsides and a nominal solar wind regime prevails.

Geospace

24 hr Summary: The geomagnetic field was quiet to unsettled this period as (+)CH HSS influence weakened.

Forecast: Quiet to unsettled levels are expected on 31 Dec under waning CH HSS influence. Generally quiet conditions are expected on 01-02 Jan with the return of a nominal solar wind regime.

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