The clusters of earthquakes have all been underneath the East Bay suburb of San Ramon, which is close to the Calaveras fault.

CONTRA COSTA COUNTY, CA - Sunday night, a preliminary 2.7 magnitude quake was detected near San Ramon, according to the U.S.

SANTA CLARA COUNTY, CA - Monday morning, a preliminary 2.0 magnitude quake was registered near Gilroy, according to the U.S.

Japan is learning what life is life under a megaquake watch. NPR's Rob Schmitz talks to Richard Allen, director of the Berkeley Seismology Lab, about what it means.

California's seismic risk is increasing with supershear earthquakes, which are faster and more destructive than typical ...

After a 7.5-magnitude earthquake on Monday, Japanese officials issued a rare warning for a potentially even larger follow-up.

At least 33 people were injured in the earthquake on Monday night, with waves reaching up to 70cm seen in several coastal ...

Aftershocks have been recorded for both earthquakes. On Dec. 8, Japanese authorities warned an even more powerful earthquake ...

Thursday's non-quake highlighted the need for better earthquake-warning tools. Three western states have a system in place, ...

A swarm of at least six earthquakes reaching up to magnitude 2.9 rattled San Ramon near San Francisco, the U.S. Geological ...

A shake alert went out over the U.S. Geological Survey's early warning system on Dec. 4, warning that a 5.9 earthquake near ...

Japan’s government says that the chances of a magnitude 8 earthquake have increased. Scientists can’t predict when one will ...