For millions of Californians, the ground did not simply shake once and fall silent. It pulsed again and again over roughly ...

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

The first jolt hit before dawn, a 2.9-magnitude quake under the Tri-Valley that woke light sleepers and set off a daylong sequence of shaking across California’s East Bay. Over the next eight hours on ...

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

The San Jacinto Fault, considered part of the San Andreas Fault system, has a 5% chance of magnitude 6.7 or larger earthquakes. The line begins at Cajun Pass and runs southeast through San Bernardino, ...

Around 90 small earthquakes have struck near San Ramon in the East Bay this month. It’s at least the sixth time a series of tiny quakes has lit up that area since 1970, including the most recent swarm ...

In compliance with adopting California’s new building standards code, on Nov. 19 Sonoma City Council considered provisions to the law that are locally-specific to Sonoma’s conditions, ...