I heard this guy on the Art Bell Show once [a real source of wisdom and knowledge, but only on rare occasions]. This is clever what he does, he takes satellite earth temperature measurements and looks at the first derivative either side of known quake fault lines. When he sees a certain pattern, I think it is warming one side and cooling the other, not real sure, he circles the location and all things considered, he has a pretty good hit rate. I don't think anybody comes close actually.. http://www.standeyo.com/