HUMBOLDT COUNTY, CA - the U.S. Geological Survey reported that a preliminary 2.5 magnitude quake occurred close to Petrolia ...

FRESNO COUNTY, CA - the U.S. Geological Survey reported that a preliminary 2.4 magnitude quake occurred close to Cantua Creek ...

It’s been a full week of earthquakes in California, including a 4.1 near Templeton that triggered an alert for residents.

Nearly 90 small earthquakes were recorded near San Ramon in the East Bay this month, according to recordings from the U.S.

A light, 4.1-magnitude earthquake struck in Central California on Tuesday, according to the United States Geological Survey.

Eastern California is the perhaps the best place in the country to learn geology. The deserts beyond the Sierra Nevada host glacial features, volcanoes and rivers. Beautiful stratigraphic layers are ...

The earth and geologic time. Earth materials -- Geologic time -- Plate tectonics -- Southern California through geologic time. Overview of the geologic history of Southern California -- Proterozoic ...

In the warm afternoons of early autumn, Bay Area residents head for the Coast Range north of San Francisco. They hike, picnic and pluck flowers atop Mount Tamalpais and its sister hills, which ...

California’s state geologist has concluded that an active earthquake fault is underneath a massive proposed skyscraper project in Hollywood, setting the stage for a huge battle at City Hall over ...

President Obama’s declaration that a large swath of Coast Range land will become the Berryessa Snow Mountain National Monument pleased a lot of people, including lovers of rocks. The park displays ...

A 4.1 magnitude earthquake struck Tuesday morning in Central California, centered near Paso Robles, according to the USGS.