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

[nw7us@sunspotwatch.com]

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

Solar Activity

24 hr Summary: Solar activity was very low. Region 2712 (N17E51, Cao/beta) produced multiple low-level B-class flares throughout the period and began to show signs of decay. Region 2711 (N06W62, Cro/beta) was largely unproductive this period and also exhibited decay. 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 May) with a chance for isolated C-class flare activity.

Energetic Particle

24 hr Summary: The greater than 2 MeV electron flux reached moderate levels and the greater than 10 MeV proton flux was steady at background levels.

Forecast: The greater than 2 MeV electron flux is expected to reach moderate levels each of the next three days (26-28 May). The greater than 10 MeV proton flux is expected to persist at background levels throughout the forecast period.

Solar Wind

24 hr Summary: Solar wind parameters were at background levels under a nominal solar wind regime. Solar wind speeds decreased from a peak of around 400 km/s to around 325 km/s after mid-period. Total field strength varied between 1-5 nT and Bz remained mostly northward throughout the period.

Forecast: Solar wind parameters are expected to persist at background levels until day three (28 May), when a minor solar wind enhancement is expected in response to the influence of a positive polarity CH HSS.

Geospace

24 hr Summary: The geomagnetic field was quiet.

Forecast: The geomagentic field is expected to be quiet on days one and two (26-27 May) under a nominal solar wind regime. On day three (28 May), the influence of a positive polarity, north polar-connected CH HSS is expected to cause periods of unsettled conditions.

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