A preliminary 2.3 magnitude quake was detected near Petrolia Saturday afternoon, according to the U.S. Geological Survey.

HUMBOLDT COUNTY, CA - According to the U.S. Geological Survey, a preliminary 2.7 magnitude quake rattled close to Petrolia ...

Multiple earthquakes shook Southern California hours after a tremor was felt on the East Coast on Aug. 5, according to data from the U.S. Geological Survey.

In Northern California, two tremors also struck overnight outside of Petrolia and Ferndale, respectively. Hours earlier on Aug. 5, some in New York reported feeling shaking after an earthquake ...

The recent earthquake is a reminder of the seismic volatility that characterizes the area near Eureka. The quake occurred in the vicinity of the Mendocino Triple Junction, a highly active seismic zone ...