Coastal communities from northern California to British Columbia live atop the Cascadia Subduction Zone, which spans about ...

A new geological fault has started to show signs of movement along the U.S. coastline, and scientists are watching closely.

Last week, there were reports that a series of small earthquakes were recorded in California that generated a few news headlines. The state is notorious for earthquake activity. It’s estimated that ...

California has dozens of earthquakes every day. Most are below 3.0 magnitude, so small that they aren’t felt.

Although the San Andreas Fault and the Cascadia Subduction Zone warrant special attention from seismologists due to their incredible earthquake-producing potential, these aren't the only faults ...

The San Andreas Fault in Southern California is a strike-slip fault, meaning two tectonic plates moving horizontally against each other. The offshore Cascadia Subduction Zone is a megathrust fault ...

The biggest danger zones of the seismic variety are the Cascadia Subduction Zone in the Pacific Northwest, the San Andreas Fault in California, and the New Madrid Seismic Zone in Missouri.

It is where three tectonic plates meet and the Northwest’s Cascadia subduction zone and California’s San Andreas Fault system meet. The quake itself occurred on the Mendocino fault zone.

The rupture struck just southwest of the Cascadia subduction zone — the notorious offshore fault that stretches from ... Coastal residents: Learn about San Francisco’s tsunami inundation ...