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

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.

A 4.0 earthquake was reported in the North Bay, while a 3.6 registered on the Central Coast Thursday. Smaller ones followed.

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 ...

Earthquakes rattled both the East and West Coasts of the United States starting on Aug. 5 Three earthquakes ranging from 3.5 to 3.7 magnitude hit the San Bernardino area of Southern California.

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 ...