[Propagation+Space Weather] Today's Space Weather Forecast Discussion on 2018 Apr 17 1230 UTC

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Here is the current forecast discussion on space weather and geophysical activity, issued 2018 Apr 17 1230 UTC.

Solar Activity

24 hr Summary: Solar activity was at very low levels. No Earth-directed CMEs were observed.

Forecast: Solar activity is expected to be at very low levels for the next three days (17-19 Apr).

Energetic Particle

24 hr Summary: The greater than 2 MeV electron flux reached high levels this period. 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 each of the next three days (17-19 Apr). The greater than 10 MeV proton flux is expected to continue at background levels throughout the forecast period.

Solar Wind

24 hr Summary: Solar wind parameters reflected a background solar wind regime. Solar wind speeds averaged near 300 km/s, total field strength ranged from 1-5 nT, and the Bz component was between +/-3 nT. Phi angle was mostly oriented in a negative sector.

Forecast: Solar wind parameters are expected to be at or near background levels through the first two days of the forecast period (17-18 Apr). By day three (19 Apr), conditions are expected to become enhanced due to the influence from an anticipated CIR ahead of a negative polarity CH HSS.

Geospace

24 hr Summary: The geomagnetic field was quiet.

Forecast: Mostly quiet conditions are expected for the first two days of the forecast period (17-18 Apr) under a nominal solar wind regime. By day three (19 Apr), an increase to unsettled to active levels is expected, due to the influence from an anticipated CIR ahead of a negative polarity CH HSS.

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