[Propagation+Space Weather] Today's Space Weather Forecast Discussion on 2019 Jul 28 1230 UTC

[nw7us@sunspotwatch.com]

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Here is the current forecast discussion on space weather and geophysical activity, issued 2019 Jul 28 1230 UTC.

Solar Activity

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

Forecast: Solar activity is expected to remain very low on 28-30 Jul.

Energetic Particles

24 hr Summary: The greater than 2 MeV electron flux was at normal levels, and the greater than 10 MeV proton flux remained at background values.

Forecast: The greater than 2 MeV electron flux is expected to be at normal to moderate levels on 28-30 Jul and the greater than 10 MeV proton flux is expected to continue at background values.

Solar Wind

24 hr Summary: Solar wind parameters, as measured by the ACE spacecraft, suggested passage of a SSBC. Total magnetic field strength ranged from 2-7 nT and Bz reached as far south as -6 nT. Solar wind speeds increased from 300 km/s to around 350 km/s after 28/0000 UTC. Phi angle transitioned from the positive to the negative solar sector after 28//0425 UTC.

Forecast: Solar wind conditions to continue near background levels on 28-30 Jul, with enhancements from CH HSSs possible on 28 Jul.

Geospace

24 hr Summary: The geomagnetic field was quiet.

Forecast: The geomagnetic field is expected to be mostly quiet, with isolated periods of unsettled conditions likely on 28 Jul, due to weak CH HSS influence. A return to mostly quiet conditions is expected on 29 Jul and continuing through 30 Jul.

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