Santa Rosa City Schools campuses are being transformed this summer, but two campuses must undergo required earthquake studies ...

A 3.3-magnitude earthquake shook the Arcata area in Northern California, the U.S. Geological Survey reported. The 14-mile deep quake hit 2 miles from Arcata at 9:50 p.m. Sunday, according to the USGS.

Recent flybys of the fiery world refute a leading theory of its inner structure—and reveal how little is understood about ...

California's earthquake faults are more likely to be "overdue" for a major quake than those elsewhere in the world, new ...

A groundbreaking international study has uncovered that 45 per cent of California's major earthquake faults have exceeded ...

Distant-source tsunami: More than 350 people could die or be injured along the Southern California coast if people wait to ...

Did you feel it? A preliminary magnitude 3.4 earthquake struck near Pinole Sunday night, according to the U.S. Geological ...

A near-certain disaster looms for California, but there are real things people can do to prepare. Here's what to know about the risks.

A minor, 3.2-magnitude earthquake struck in Southern California on Wednesday, according to the United States Geological Survey. The temblor happened at 12:27 p.m. Pacific time about 15 miles southwest ...

A new U.S. Geological Survey study identifies Wyoming’s western border as part of a massive geothermal reserve. Geologists say it could be tapped ...

USGS detected the first quake, a 2.9 magnitude, Thursday afternoon, northeast of San Francisco. This tremor was located on Calaveras Fault, a major branch of the San Andreas Fault system.