How are you going to find trustworthy information about an ongoing disaster?

I guess you start by using what you have learned in ordinary times: ignore sources that deal in sensational speculation; and exercise skepticism when technical topics are clearly over the heads of the talking heads.

But what about topics new to you, like nuclear reactor operations and safety systems, tsunamis, or whatever? Is there any alternative to becoming your own expert as fast as possible?

How do you find the voice of reason?