A hidden chunk of an ancient tectonic plate is stuck to the Pacific Ocean floor and sliding under North America, complicating ...

Large subduction-zone earthquakes leave scars on the continental slope in the deep sea.

It was a groundbreaking discovery. Scientists have found previously concealed fault lines along California’s north coast, ...

Tiny earthquakes reveal hidden fault structures beneath Northern California, reshaping understanding of regional earthquake ...

A newly discovered fault complexity beneath America's most active earthquake zone raises the possibility that a major seismic ...

Northern California’s coast keeps you on alert, even on quiet days. Offshore, three tectonic plates meet near Humboldt County ...

One of the most terrifying discoveries for the US population in general has just been made off the north coast of California. Scientists have found geological faults that had remai ...

Scientists are uncovering a hidden and surprisingly complex earthquake zone beneath Northern California by tracking swarms of ...

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

By tracking swarms of very small earthquakes, seismologists are getting a new picture of the complex region where the San ...

Along the remote coast where the San Andreas Fault meets the Cascadia subduction zone, earthquakes too small for humans to ...

A 6.0 magnitude earthquake strikes off Oregon coast, triggering tsunami alert and concerns of aftershocks, as the Cascadia ...