They were considered the “biggest earthquakes in American history,” New Madrid officials said. Should another one occur along the underground fault line, it could be “catastrophic ...

The minor earthquake near Jackson occurred on the New Madrid Fault Line, the fault zone that the Mid-South, including Memphis, sits on. Two days earlier, a minor earthquake registered near Dyersburg.

NEW MADRID — At the New Madrid Historical Museum there’s an earthquake simulator where visitors get to play engineer. At their disposal are cylindrical wooden sticks and rectangular boards ...