[Propagation+Space Weather] Today's Space Weather Forecast Discussion on 2018 Jul 27 1230 UTC

[nw7us@sunspotwatch.com]

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Here is the current forecast discussion on space weather and geophysical activity, issued 2018 Jul 27 1230 UTC.

Solar Activity

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

Forecast: Solar activity is expected to remain very low all three days (27-29 Jul).

Energetic Particle

24 hr Summary: The greater than 2 MeV electron flux reached high levels with a maximum flux of 2,570 pfu observed at 26/1855 UTC. The greater than 10 MeV proton flux remained at background values.

Forecast: The greater than 2 MeV electron flux is expected to reach high levels for the next three days (27-29 Jul). The greater than 10 MeV proton flux is expected to continue at background levels.

Solar Wind

24 hr Summary: Solar wind speeds, as measured by the DSCOVR spacecraft, suggested a return to a nominal environment. Total magnetic field strength was at or below 5 nT. Solar wind speeds steadily declined from a peak near 500 km/s at the beginning of the reporting period to near 400 km/s by the periods end. Phi angle was predominantly oriented in the negative sector.

Forecast: A nominal solar wind environment is expected to persist over the next three days (27-29 Jul).

Geospace

24 hr Summary: The geomagnetic field was at quiet levels.

Forecast: The geomagnetic field is expected to be at mostly quiet levels for the forecast period (27-29 Jul).

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