Its been awhile for Cascadia. And it produces 9.0s with 100 foot tsunamis. The entire length tends to go all at once too. Think its like 1000 miles. A Cascadia quake would be felt across almost the entire Pacific Rim. I think the only bigger natural disasters that could hit earth are a meteor, a supervolcano or Hawaii/Azores landslide.

Its been awhile for Cascadia. And it produces 9.0s with 100 foot tsunamis. The entire length tends to go all at once too. Think its like 1000 miles. A Cascadia quake would be felt across almost the entire Pacific Rim.