HUMBOLDT COUNTY, CA - A 3.6 magnitude quake jolted near Petrolia on Monday morning, according to the U.S. Geological Survey.

A preliminary 3.4 magnitude earthquake struck in Humboldt County Saturday morning, according to the United States Geological ...

HUMBOLDT COUNTY, CA - A 2.4 magnitude quake occurred close to Petrolia on Saturday night, according to the U.S. Geological Survey. A tremor shook the region at 11:02 p.m. (10:02 p.m. local time). The ...

HUMBOLDT COUNTY, CA - A 2.6 magnitude quake occurred close to Petrolia at midday on Monday, according to the U.S. Geological Survey. The tremor rattled the area at 1:31 p.m. (12:31 p.m. local time).

HUMBOLDT COUNTY, CA - A 2.5 magnitude quake rattled near Petrolia on Monday morning, the U.S. Geological Survey reported. A tremor shook the area at 3:49 a.m. (2:49 a.m. local time). The earthquake's ...