At 5:22 p.m. yesterday afternoon, a 2.4 magnitude earthquake slightly shook a few towns in Morris County. Montville Township emergency management coordinator Rudy Appelmann told the Star-Ledger, "It was kind of a rolling rumble, like a long, extended thunder. Basically a lot of things shook, and a lot of phones rang." More calls were from residents who thought there was an explosion. Twelve days ago, there was a 3.0 magnitude earthquake in Morristown, NJ. More details about yesterday's earthquake at the U.S. Geological Survey.