Seriously .. if you are "expecting the BIG ONE any second" ... maybe you should move?
My preparation of a truck camper as an emergency shelter makes perfect sense to me. It is mobile, has a built-in generator but is mostly run by solar charging, provides enough space to sleep and live with heat and AC. Few people prep their RV's as an emergency shelter. I'm not sure why. Naturally, I hope my community does not have to face a major earthquake, but I do find it interesting when I get criticism for preparing. Am I coming across as paranoid, or prepared?
If you move further east, you start to get other hazards: Hurricanes, tornados, flooding, forest fires. Take your pick, there's always something to worry about.
The important thing is to know what the hazards are for your area and prepare for those.