Long time no see, quality related folks.
I'm sure this was covered in another thread but the related British Standard changed to an ISO standard a year or so back (BS 25999 to ISO 22301).
The general function and the standard requirements are sort of two different things but it can't hurt to reference what a complete documented management system covers, since the functional aspects are a big part of it. For example, there is a good reason for separating an initial background review into different stages of Business Impact Assessment and then Risk Assessment.
Unless my memory fails me I read an Australian standard that did it in the other order some time ago, RA first then BIA, but now that an ISO version is set everyone might as well agree on that other order.
As in the case of everything in the world of process and standards the general content on the internet would be of limited usefulness since specific application in any company depends on informed interpretation and application, but then that goes without saying.
BCP "template" examples you find online are generally pretty bad (short on content, or even just short on words) but if you run across actual examples people put out there for different reasons (eg. a university's disaster-specific planning) some of that might be helpful as input. Of course they couldn't help identify your own critical business processes, and specific disruption threats, and risk mitigation measures (contingency plans), which is really the main point more than what to do in an earthquake, even if that is quite relevant in some places.