Latest Update: Northern Lights Forecast Upgraded For U.S. Tonight As Aurora Sighted In Europe
A G4 (Severe) geomagnetic storm is underway and aurora are visible from Europe and the U.K. It could mean northern lights for U.S. states down to California and Alabama.
I am pretty sure that it depends on how big and energetic the solar ejection.
Yes. 10/11 was a tight impact from a big CME
https://spaceweathernews.com/
http://aurora.linxi.com.au/
Told a friend that her migraine onset of early y'day may be related.
https://www.mdpi.com/journal/atmosphere/special_issues/space_weather_health
Yes, it does.