Magnitude 5.7 and 5.1 earthquakes shake California. Here's where

A series of moderate earthquakes rattled the waters off Northern California and southern Oregon early Thursday near the ...

Update: 5.1 magnitude earthquake detected near Petrolia, CA on June 3

HUMBOLDT COUNTY, CA - A 5.1 magnitude quake jolted close to Petrolia on Wednesday morning, the U.S. Geological Survey ...