You are going about your day. All is calm and quiet until suddenly, the ground beneath your feet begins to shake, and items ...

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 ...

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 ...

The Helena Valley sits atop a variety of different sediments and rocks, making it particularly susceptible to earthquake ...

YACHATS, Ore. — A 5.4 magnitude earthquake was among two that struck early Wednesday morning off Oregon's coast. According to ...

Typical geologic investigations of active earthquake fault zones require that the fault can be observed at or near the Earth's surface. However, in urban areas, where faults present a direct hazard to ...

The magnitude 7.5 earthquake that shook northeast Afghanistan and Pakistan on Monday was a type of quake not easily understood by scientists, even though it happened in what the U.S. Geological Survey ...