A spike in earthquakes at Mount Adams, a volcano in Washington state, prompted scientists to install additional monitoring instruments to assess the seismic activity.

For U.S. earthquake scientists, Japan's 'megaquake' warning renewed worries about when and how to warn the public if they find clues that the 'big one' might be coming for the West COast.

Earthquakes can cause tsunamis that can be more harmful than the earthquake itself. In Washington state, a 7.5 magnitude earthquake could create a tsunami with waves up to 42 feet tall, according ...

Shaking was felt across northwestern Washington early Monday morning as an earthquake struck the San Juan Islands region near the border with Canada. The 4.5-magnitude earthquake occurred at about ...

On April 13, 1949, at 11:55 am, Tacoma was hit by a magnitude 7.1 earthquake. Bob Anderle (far right) looks down at the broken gable and the facing bricks that fell from one of the dormer windows ...

Are you prepared if an earthquake were to shake western Washington? That was the focus of the Great Washington ShakeOut Thursday. The annual event focuses on preparing people for an earthquake and ...

Since Feb. 18, Washington has seen seven earthquakes with a magnitude above 2.5, including the strongest earthquake to hit the state in five years, a magnitude 4.5 that struck Orcas Island early ...

ORCAS ISLAND, Wash. — Tens of thousands of people in western Washington and southwestern British Columbia felt a magnitude 4.5 earthquake on Monday that struck near the southeast side of Orcas ...

Earthquakes can cause tsunamis that can be more harmful than the earthquake itself. In Washington state, a 7.5 magnitude earthquake could create a tsunami with waves up to 42 feet tall, according ...

Mar. 7—Since Feb. 18, Washington has seen seven earthquakes with a magnitude above 2.5, including the strongest earthquake to hit the state in five years, a magnitude 4.5 that struck Orcas ...

North Hollywood shaken by earthquake, but no reports of damage made 01:54. An earthquake struck the northwest part of Washington state near the U.S.-Canada border early Monday morning, officials ...