Re: navigation, I think a button compass is an OK choice in that sort of situation. A baseplate compass is better but a lot bulkier and hardly practical for a really small, compact survival kit intended for actual EDC.

Either way, I wouldn't put a compass very high on my priority list in an earthquake scenario. Might come in handy for sure, but so would many other tools and gadgets that simply cannot be carried on one's person on a day in, day out basis.