[WhitneyLand]

How rare is this?

G4 storms are ~100 per solar cycle (~11 years).

So roughly 9 G4 events/year on average.

[tbrownaw]

But they should mostly be in the same part of the cycle rather than spread evenly.

It probably wouldn't make sense to calculate "average snow days per month" across an entire calendar year (in most places...), this is the same thing.

[rapht]

This is an S4. Last S4 event was in October 2003.

[velocity3230]

This is an S4, though.

[velocity3230]

Belay that. The G-value was high too.

[burnt-resistor]

Like 20-25 years rare according to some space weather youtuber.

[creatonez]

> some space weather youtuber

Please stop watching that guy, he is a total fraud and knows nothing about physics.