The tiny Juan de Fuca plate is largely responsible for the volcanoes that dot the Pacific Northwest of the United States. The plates make up Earth's outer shell, called the lithosphere.

The Cascadia subduction zone, where the oceanic Juan de Fuca plate descends beneath the overlying North American plate, extends 1100 km from northern California to northern Vancouver Island.

An earthquake struck near Snoqualmie Monday afternoon, according to the United States Geological Survey (USGS). The 3.5 magnitude quake hit just after 1 p.m. Monday near Snoqualmie. According to the ...

A 4.2 magnitude earthquake struck about 143 miles southwest of Tofino, B.C., at around 5:53 a.m. A second 3.0 magnitude ...

These rumblings are likely caused by "impending magmatic rupture," a cyclical process where the Earth creates new seafloor ...

A tsunami warning has been lifted after a 7.0-magnitude earthquake hit offshore Cape Mendocino in Northern California Thursday, the U.S. Geological Survey said. U.S. News // 2 years ago FEMA ...