Anatoly Petrukovich: "It's a pretty powerful storm, but it's not unique" The only manifestation that residents of the middle lane will notice is that you can see the aurora in non-standard places. The storm reached the G4 class out of five indicators, where G5 is extremely strong.
The corresponding level implies serious interference in communications, in satellite and radio frequency navigation. The impact on human health, there is no generally accepted answer to this question.