Supplemental Info:

Geomagnetic Storm

Level: G4 - Severe

Effects:

Power systems: Possible widespread voltage control problems and some protective systems will mistakenly trip out key assets from the grid.

Spacecraft operations: May experience surface charging and tracking problems, corrections may be needed for orientation problems.

Other systems: Induced pipeline currents affect preventive measures, HF radio propagation sporadic, satellite navigation degraded for hours, low-frequency radio navigation disrupted, and aurora has been seen as low as Alabama and northern California (typically 45° geomagnetic lat.).

More via the NOAA Space Weather Prediction Center

https://www.swpc.noaa.gov/

https://www.swpc.noaa.gov/noaa-scales-explanation