An earthquake struck off the northern California coast on Tuesday, marking the strongest in the region in nearly two decades.

A new study mapping the Cascadia Subduction Zone is giving scientists clues about the state of the fault line as the Pacific ...

A 7.0-magnitude earthquake off the California coast briefly triggered a tsunami warning for parts of Northern California and ...

A tsunami warning was issued across Northern California on Thursday morning following a magnitude 7 earthquake. It's a ...

if and when a major Cascadia quake strikes, there won’t be time for an official warning for high-risk coastal areas along the subduction zone. “For an event that strong, the earthquake is your ...

The Cascadia Subduction Zone is capable of generating "megathrust" earthquakes with magnitudes of 9.0 or higher. Such an event, which last occurred over 300 years ago, could trigger a tsunami ...