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

By tracking swarms of very small earthquakes, seismologists are getting a new picture of the complex region where the San Andreas fault meets the Cascadia subduction zone, an area that could give rise ...

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

Memorizing seven continents feels settled, like learning the alphabet. A new study argues the ground rules are less tidy.

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

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

Researchers have identified an ancient tectonic fragment, the Pioneer fragment, buried under the coast, which may exacerbate earthquake hazards associated with the San Andreas and Cascadia faults.

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

Invisible earthquakes are revealing a hidden tectonic puzzle beneath California’s most dangerous fault zone.

Ground fissures and tectonic faults represent critical structural features within sedimentary basins, where the interplay of regional stress fields, depositional environments and, at times, human ...

We won’t feel it in our lifetime ...

The Carrizo Plains provides good visibility of the San Andreas Fault in southern California. On Earth, the motion along faults is driven by plate tectonics, powered by convection of the planet’s ...