OK, jokes aside, I have no experience with earthquakes. But I wouldn't think the preps for them would be a whole lot different than for other disasters. The things that do come to mind are: (1) There may be major disruption to roads and other transportation arteries. (2) Infrastructure (fresh water, sewage, electricity, etc.) may be severley affected for a significant length of time. (3) You have to deal with potential long-term instability of structures around you - even once the initial earthquake has passed, you are still in danger of things collapsing around you.

How you prep for this, I don't know. But the first step would be to become aware of what you might have to deal with.