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 ...

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

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

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

A preliminary 4.4 magnitude earthquake shook in Northern California Tuesday afternoon, according to the United States ...

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

A magnitude 4.4 earthquake hit a lightly populated area east-southeast of Willits on Tuesday afternoon, with no immediate ...

A 4.2-magnitude quake struck Sonoma County and shook nearby areas in Northern California early Thursday morning, according to the United States Geological Survey. The epicenter was recorded just after ...

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

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

Seismologists have discovered hidden faults at the Mendocino Triple Junction by tracking tiny earthquakes using a new ...