California is riddled with a number of fault lines that frequently cause earthquakes, including Arrowhead, Waterman Canyon, ...

"We've added details on how faults rupture and how complex they might ... the most recent major quake to hit the U.S. T ools like the USGS map are used to help inform building codes and ...

according to a "shake map" from the United States Geological Survey. The map shows the majority of reports were concentrated on the North Shore of Massachusetts, southeastern New Hampshire and ...