[Propagation+Space Weather] Today's Space Weather Forecast Discussion on 2020 Dec 17 1230 UTC

[nw7us@sunspotwatch.com]

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Here is the current forecast discussion on space weather and geophysical activity, issued 2020 Dec 17 1230 UTC.

Solar Activity

24 hr Summary: Solar activity reached very low levels during the period. Region 2792 (S22E06) was inactive and decayed to plage. Region 2793 (S15E29, Cro/beta) remained inactive and not overly complex. No Earth directed CMEs were observed by available LASCO imagery.

Forecast: Solar activity is expected to be very low on 17-19 Dec, with a slight chance for C-class flares all three days.

Energetic Particles

24 hr Summary: The greater than 2 MeV electron flux was at normal to moderate levels and the greater than 10 MeV proton flux remained at background values.

Forecast: The greater than 2 MeV electron flux is expected to remain at normal to moderate levels on 17-19 Dec while the greater than 10 MeV proton flux is expected to continue at background levels.

Solar Wind

24 hr Summary: Solar wind parameters, as measured by available DSCOVR spacecraft data, reflected nominal conditions. Total magnetic field strength was at or below 6 nT, the Bz component varied between +/-3 nT and wind speeds varied close to 275-290 km/s over the period. Phi angle was predominantly oriented in positive sector.

Forecast: The solar wind environment is expected to undergo slight enhancements on 17 Dec due to weak, negative polarity CH HSS influences before a quick return to nominal conditions 18-19 Dec.

Geospace

24 hr Summary: The geomagnetic field was at quiet levels.

Forecast: The geomagnetic field is expected to be at quiet to unsettled conditions on 17 Dec due to weak, negative polarity CH HSS influence. A return to mostly quiet conditions is anticipated for 18-19 Dec.

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Live data: SunSpotWatch.com

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