How do earthquakes occur far away from plate boundaries?
There has just been a 4.8 magnitude earthquake in New Jersey, but from what I understand it lies in the middle of the North American plate. I had always assumed from what I learnt in school that earthquakes are usually due to plate boundaries, but are there other ways in which they can occur? Or are the plate boundaries not really as crystal clear as those maps show and have minor faults of their own? Was just wondering after what happened earlier today. #science