A 4.4-magnitude earthquake struck Mendocino County, 120 miles north of San Francisco, and was felt across the Bay Area, ...

San Ramon has been hit by scores of tremors since mid-November.

A 4.4 magnitude earthquake struck without warning on a Tuesday afternoon, its epicenter 120 miles north of San Francisco in ...

A preliminary 4.4 magnitude earthquake shook in Northern California Tuesday afternoon, according to the United States Geological Survey. The epicenter was about 5.6 miles southeast of Willits in ...

A 4.4 magnitude earthquake struck Mendocino County on Tuesday afternoon, according to the U.S. Geological Survey.

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

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

Three huge tectonic plates meet at the Mendocino triple junction off the coast of northern California, and a new study reveals that the underlying geology is significantly more complex than current ...

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

Tremors beneath Northern California show hidden plate movement, helping scientists better understand where future big ...