What kind of thought train does from 'hang on there're some big faultlines here and we all know big ones are due' to 'sure here's a million bucks let me put all my stuff on top of this faultline'
So where can you build that DOESN'T have SOME recurrent set of disasters AND lets you make enough money to live well on?
East and south coasts have hurricanes (and much more often). Northern tier has blizzards. Sourthern states are lousy with tornadoes (and virtually any flat region south of mid-Michigan has some of them). Crippling / killing blizzards across the upper tier. Floods. Forest fires. Then there's a bunch of nasty diseases that are primarily local and break out intermittently. I could go on for pages.
Earthqakes can be bad. But big ones are rare - far rarer (even right on the major fault lines) than floods and tornadoes are in other parts of the country - and you can build structures that survive them just fine.
Even a 7ish like the famous Loma Prieta quake was, in the S.F. Peninsula, about like "15 seconds of mild turbulence" on a passenger airliner. That's nothing compared to, say, what a manufactured home goes through on its way from the factory to the site. Sure some old stuff in a couple spots failed - and the media zeroed in on them and made it look like several counties were flattened and burning. But they're really not as big a deal as their reputation suggests.