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 ...

On a quiet stretch of Mendocino County roadway, a single boulder pulled from a roadside cut has forced archaeologists to ...

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 ...

Explore the debate surrounding California state rock serpentine and its connection to chrysotile asbestos exposure in the latest bill. “There is no way anyone is going to get bothered by casual ...

Like Italy, California is a restless landscape straddling two major tectonic plates. But while our earthquake risks are similar, the seismic forces that underlie both regions are quite different. Our ...

Once upon a time, when roads were less crowded and freeways filled the need for speed, people often stopped their cars at roadsides to look around. That was decades ago, and many California drivers — ...

FOLLOWING the earlier studies of the igneous and metamorphic rocks of the mining districts of California, there has more recently been an immense amount of detailed and accurate work devoted to ...