[Propagation+Space Weather] Today's Space Weather Forecast Discussion on 2018 Mar 24 1230 UTC

[nw7us@sunspotwatch.com]

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Here is the current forecast discussion on space weather and geophysical activity, issued 2018 Mar 24 1230 UTC.

Solar Activity

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

Forecast: Solar activity is expected to be very low over the next three days (24-26 Mar).

Energetic Particle

24 hr Summary: The greater than 2 MeV electron flux briefly reached high levels this period, with a maximum flux of 1,090 pfu observed at 23/2105 UTC. The greater than 10 MeV proton flux continued at background values.

Forecast: The greater than 2 MeV electron flux is expected to reach high levels each of the next three days (24-26 Mar). The greater than 10 MeV proton flux is expected to remain at background levels throughout the period.

Solar Wind

24 hr Summary: Solar wind parameters were slightly enhanced this period under what appears to be the intermittent influence of a negative polarity CH HSS. Solar wind speeds reached a peak value of around 500 km/s early in the period and then slowly decreased to end-of-period values near 400 km/s. Total field strength values briefly reached 9 nT early in the period and Bz remained within +/- 4 nT.

Forecast: The solar wind environment is expected to remain enhanced over the next three days (24-26 Mar) due to the effects of a CIR in advance of a recurrent, polar connected, negative polarity CH HSS.

Geospace

24 hr Summary: The geomagnetic field was at quiet to active levels due to negative polarity CH HSS influence.

Forecast: Early to midday on day one (24 Mar), a CIR in advance of a recurrent, polar connected, negative polarity CH HSS is expected to cause an enhancement of the magnetic field. Field conditions are expected to be at predominately unsettled to active levels, with likely periods of G1 (Minor) geomagnetic storm conditions, on days one and two (24-25 Mar). By day three (26 Mar), field conditions are expected to be at predominately quiet to active levels as CH HSS influence begins to wane.

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