Earthquake of magnitude 2.7 registered near Petrolia, CA on June 6

HUMBOLDT COUNTY, CA - A preliminary 2.7 magnitude quake occurred close to Petrolia on Saturday morning, according to the U.S. Geological Survey.

Why does California get so many earthquakes? Here's what causes them

California sits on an active plate boundary where the Pacific and North American plates grind past each other, producing frequent earthquakes.
Morning Overview on MSN

Earth’s Ring of Fire produces about 90% of all earthquakes

Hundreds of millions of people live along coastlines that trace the most seismically active belt on the planet. The Ring of Fire, a chain of subduction zones and volcanic arcs encircling the Pacific Ocean,

What to do during an earthquake: Simple steps to stay protected

Temblors frequently strike around the world. These suggestions will help you prepare for the next quake that might rattle your town.

Back-to-back 5.0-plus earthquakes shake California. See where

Earthquakes near Mendocino Triple Junction shake waters off Northern California with no tsunami or major damage.

New month doesn't stop rumbling in SC as earthquake hits the Columbia area

There were seven earthquakes confirmed in South Carolina in May, according to the USGS.