SEATTLE — Officials are tracking the largest swarm of earthquakes in more than 15 years on Washington's Mount Rainier but say ...

PANAMA CITY (AP) — An earthquake with a preliminary 6.2 magnitude struck off the Pacific coast of Panama on Monday, authorities said. No injuries or damage were immediately reported.

On Tuesday, hundreds of earthquakes were detected, with depths ranging from 1.2 to 3.7 miles below the summit.

To see how a magnitude-9.0 earthquake would rattle the Pacific Northwest, researchers ran 50 virtual simulations on a ...

The United States Geological Survey (USGS) shows lava fountains shooting up high in the latest episode of an ongoing eruption of Kilauea volcano inside Hawaii Volcanoes National Park on Wednesday, ...

Hundreds of earthquakes are detected at or near Mount Rainier each year, with "swarms" typically occurring once or twice annually. No need to panic.

More than 300 tremors were recorded below Mount Rainier over the course of three days. Scientists say they were too weak for ...

Two small earthquakes struck the South Bay on Tuesday. The quakes hit less than two hours from each other. LOS ALTOS, Calif. - Two small earthquakes hit the South Bay on Tuesday. What we know: The ...