[Propagation+Space Weather] Today's Space Weather Forecast Discussion on 2018 Mar 26 1230 UTC

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Here is the current forecast discussion on space weather and geophysical activity, issued 2018 Mar 26 1230 UTC.

Solar Activity

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

Forecast: Solar activity is expected to be very low over the next three days (26-28 Mar).

Energetic Particle

24 hr Summary: The greater than 2 MeV electron flux reached high levels this period with a maximum flux of 5,330 pfu observed at 25/2305 UTC. The greater than 10 MeV proton flux continued at background values.

Forecast: The greater than 2 MeV electron flux is expected to reach moderate to high levels each of the next three days (26-28 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 reflected the continued influence of a negative polarity CH HSS this period. Solar wind speed was steady between 450-475 km/s until around mid-period speed values began to slowly increase to the low 500 km/s range. Bz varied between +/- 5 nT throughout the period.

Forecast: The solar wind environment is expected to remain enhanced through day one (26 Mar) due to continued effects of a recurrent, polar connected, negative polarity CH HSS. By day two (27 Mar) through day three (28 Mar), solar wind parameters are expected to slowly return to more nominal levels as CH HSS influence wanes.

Geospace

24 hr Summary: The geomagnetic field ranged from quiet to active levels over the past 24 hours due to negative polarity CH HSS influence.

Forecast: Field conditions are expected to be at quiet to active levels on day one (26 Mar) due to persistent influence from a negative polarity CH HSS. By day two (27 Mar), quiet to unsettled levels are anticipated as CH HSS influence begins to wane. Mostly quiet conditions are expected on day three (28 Mar) as a nominal solar wind regime prevails.

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