NORFOLK, Va. — Fault lines are fractures or breaks in the Earth's crust where tectonic plates move past each other, often resulting in earthquakes. These geological features are classified into three ...

The graphic on the top shows how a high-angle normal fault cuts between two of the earth's plates. The block on the right shifts down as the fault moves. The graphic on the bottom shows a low-angle ...

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 ...

While it is often said that mountains don’t move, in reality, the Colorado Rocky Mountains are the result of a slow dance that has been occurring beneath the earth’s surface for hundreds of millions ...

On September 19, a magnitude 7.1 earthquake rocked central Mexico, with fatalities estimated in the hundreds—the largest, most serious earthquake of at least 19 that the U.S. Geological Survey ...

Even planet Earth has its faults. Movement along those fault lines causes earthquakes, big and small, to rattle the globe every day, most recently making news this week with a powerful quake, and ...