California is home to hundreds of faults. This partly explains why the state sees so many earthquakes. They can range wildly in size and shape. A fault is a fracture zone between two large blocks of ...

April 23 (UPI) --For the first time, scientists have produced a comprehensive map of the tectonic stresses acting on the North American continent. In the short term, the map of North American faults - ...

Over the last several weeks, earthquakes have rocked parts of the United States from Alaska to Wednesday morning's quake in Tennessee. The most recent quake registered as a magnitude 4.4, just ...

Gear-obsessed editors choose every product we review. We may earn commission if you buy from a link. Why Trust Us? Two opposite types of faults, normal and reverse, help explain our undersea mountain ...