He doesn’t necessarily say where it will happen, I’m not super versed in tectonic activity but from what I have gathered from him is once a big quake happens that energy ripples down the fault in both directions and it has to “realign “ if there’s any stuck parts of the plate as the energy is traveling you get another quake. He truly is fascinating and it is great to watch, but I’m into history, documentaries, how it’s made type stuff…so it’s right on my alley.