Learn about the movement of tectonic plates off the coast of northern California, a process that could incite major earthquakes.

Seismic tremors reveal a shallow fragment of ancient tectonic plate beneath Northern California, helping explain damaging earthquakes near the surface.

Tremors beneath Northern California show hidden plate movement, helping scientists better understand where future big earthquakes may occur.

Focusing on an area off the coast of Crescent City, California, the researchers used autonomous and remotely operated vehicles to get detailed views of the slope and sediment deposits. They also used sediment cores from the region to radiocarbon-date the turbidite deposits and compare their timing to the dates of known ancient Cascadia quakes.

A hidden shard of ancient crust has been detected where California’s San Andreas system collides with the Cascadia subduction zone, reshaping how I understand the tectonic engine of the West Coast. The newly mapped block,

Earthquakes happen due to sudden movement of tectonic plates and stress release along fault lines beneath the Earth’s crust. Learn causes of earthquakes, tectonic activity, seismic waves, earthquake zones and key geological facts.

A deep earthquake in Chile surprised scientists by using heat to grow stronger far underground and cause serious surface shaking.

New Jersey’s magnitude 4.8 earthquake on April 5 continues to be front-page news. At least 50 aftershocks have been recorded including a widely felt 2.6 last Wednesday. Teams of geologists, seismologists, and engineers are looking for the causative fault ...