Bottom line is that if you live in earthquake country you should be ready for an earthquake at any time, because they are essentially unpredictable. I try to keep at least a half tank of gas in my vehicle, and keep a stock of survival supplies therein.

I keep my camping gear handy and organized because I will probably stay home since it may not be possible or feasible to leave. I have a stockpile of of potable water and food sufficient for about a month.

When the Big One happens, we will assess the situation and decide on a course of action.
Geezer in Chief