Yup, a big one courtesy of the Cascadia is just a matter of when, not if. Interestingly, earthquake insurance seems slow to catch on here in the PNW. Same goes for retrofitting critical infrastructure -- but I suspect that will all change after a massive quake.
I am not so sure about that, based on the SoCal experience. there are still numerous "soft story" apartments, the type responsible for significant loss of life in the 1994 Northridge quake that haven't been identified, let alone retrofitted. And that is right here in EQ Central.