Along the remote coast where the San Andreas Fault meets the Cascadia subduction zone, earthquakes too small for humans to feel are sketching out a hidden map of danger. By tracking these tiny tremors ...

Three huge tectonic plates meet at the Mendocino triple junction off the coast of northern California, and a new study ...

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.

“A lot of times we’re analyzing big earthquakes to understand how these big faults move, but in this case we’re actually looking at the tiniest earthquakes happening all the time,” David Shelly, a ...

It was a groundbreaking discovery. Scientists have found previously concealed fault lines along California’s north coast, sparking concerns that we could be drastically underestimating the earthquake ...

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

The work, by researchers at the U.S. Geological Survey, the University of California, Davis and the University of Colorado Boulder, is published in Science. "If we don't understand the underlying ...

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

It could trigger "devastating" major earthquakes, say scientists. Study co-author Professor Amanda Thomas, of the University of California, Davis, said: “If we don’t understand the underlying tectonic ...