An area in the Pacific Northwest lies on a 'subduction' zone where a tectonic plate slides underneath the North American ...

GREENWATER, Wash. — A magnitude 3.8 earthquake struck western Washington Sunday morning, according to the U.S. Geological ...

Additional information collected about the earthquake may also prompt U.S.G.S. scientists to update the shake-severity map. The San Diego County Sheriff’s Office said that there had been no ...

KTLA California Interactive Earthquake Map So far, there have been no reports ... according to the USGS. In North America, only Alaska records more quakes per year than California.

VASHON ISLAND, Wash. — An earthquake struck Vashon Island late Monday night, according to the Pacific Northwest Seismic Network (PNSN). The tremors spread across a wide area, with people in ...