My opinion Edgar Cayces earthquake predictions are off (late) by a generation. And just half or less will pan out
Keep in mind that the sort of events he predicted would be many orders of magnitude more energetic than the asteroid that killed off the dinosaurs 65 million years ago. Here's a map someone made based on what Cayce predicts North America will look like a year from now.
It's patently absurd, but Cayce was a charlatan, not a scientist.