Anytime something like this happens, wouldn't they have seismic sensors that would detect a crash of this size? I can't see one of these things going down soft

Anytime something like this happens, wouldn't they have seismic sensors that would detect a crash of this size? I can't see one of these things going down softly once pilot ejects unless it had some kind of drone mode, in which case god help us who knows where it is?