A minor, 3.1-magnitude earthquake struck in the San Francisco Bay Area on Thursday, according to the United States Geological ...

Yet much about the landscape under the ice has been uncertain, because ground and air surveys are difficult in the region.

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

Many of the state’s largest earthquakes have struck near the junction, where the Pacific, North American and Gorda plates ...

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

The chief of Bingwi Neyaashi says an upgraded power transmission line can’t come soon enough. Paul Gladu’s community, also ...

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