According to USGS data, the seven earthquakes occurred over a span of two days and were centered near the city of Santa Rosa in Sonoma County. Preliminary readings placed the epicenters predominantly ...

A small 3.3 magnitude earthquake struck near San Ramon, California, late Monday night local time, the U.S. Geological Survey ...

For generations, scientists believed that the West Coast’s two great earthquake engines — the Cascadia subduction zone and the San Andreas fault — operated on separate geologic stages. One dives, one ...

Scientists long treated Cascadia and San Andreas as separate, but new research led by Chris Goldfinger suggests they can move in rhythm, even within hours.

One of the most dangerous faults in the United States, the Cascadia Subduction Zone, may be able to trigger an earthquake on the San Andreas Fault, a new study says. But some scientists want more ...

While the thriller is an acknowledged “popcorn” movie, director Brad Peyton did not make light of the real-world results of a powerful earthquake. “It’s real world,” Peyton says. “It’s not aliens or ...

A 3.2-magnitude earthquake struck in the San Ramon Valley Thursday morning, according to the U.S. Geological Survey. The ...

A specific type of earthquake that can cause particularly intense shaking is more common than previously believed, some scientists say — carrying potentially profound risk for communities across ...

CONTRA COSTA COUNTY, CA - the U.S. Geological Survey reported that a preliminary 2.6 magnitude quake shook near San Ramon at ...

CONTRA COSTA COUNTY, CA - According to the U.S. Geological Survey, a preliminary 2.3 magnitude quake occurred near San Ramon on Sunday around midday. The tremor, which shook the region at 11:22 a.m., ...