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 ...

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 ...

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.

And a 2.9 magnitude earthquake struck 10 miles west-southwest of Petrolia in Northern California at around 11:40 a.m. on Thursday morning.

The three magnitude-3 quakes near Petrolia took place near the northern portion of the infamous San Andreas fault, a major fracture in the Earth's crust that spans 800 miles up and down California.

HUMBOLDT COUNTY, Calif. (KGO) -- A large earthquake struck off the coast of Petrolia, a community in Humboldt County, in Northern California USGS reports. The quake struck at 3:08 p.m. with a 5.2 ...

A 4.4-magnitude earthquake shook the Northern California coast near Petrolia on Tuesday night, the U.S. Geological Survey reports. The 18-mile deep quake hit at 5:24 p.m. Pacific time, according ...