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

[nw7us@sunspotwatch.com]

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

Solar Activity

24 hr Summary: Solar activity was very low. Region 2706 (N03W16, Axx/alpha) showed signs of continued decay. No Earth-directed CMEs were observed in available coronagraph imagery.

Forecast: Solar activity is expected to be very low, with a slight chance for C-class flare activity, over the next three days (26-28 Apr).

Energetic Particle

24 hr Summary: The greater than 2 MeV electron flux reached high levels this period with a peak flux of 5,060 pfu at 25/1950 UTC. The greater than 10 MeV proton flux was steady at background levels throughout the period.

Forecast: The greater than 2 MeV electron flux is expected to reach high levels each of the next three days (25-27 Apr) with a chance of decreasing to normal to moderate levels on days two and three (26-27 Apr). The greater than 10 MeV proton flux is expected to persist at background levels throughout the forecast period.

Solar Wind

24 hr Summary: The solar wind environment was at background levels. Solar wind speed was generally less than 350 km/s throughout the reporting period. Total field ranged from 1 to 5 nT and Bz was variable. Phi angle was predominantly negative.

Forecast: Solar wind parameters are expected to remain at background levels for most of day one (26 Apr) then become elevated on days two and three (27-28 Apr) with the onset of a recurrent, positive polarity CH HSS.

Geospace

24 hr Summary: The geomagnetic field was quiet.

Forecast: The geomagnetic field is expected to be generally quiet for most of day one (26 Apr). Unsettled to active levels are anticipated on days two three (27-28 Apr) due to a recurrent, positive polarity CH HSS.

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