HUMBOLDT COUNTY, CA - A preliminary 2.0 magnitude quake struck near Rio Dell on Thursday afternoon, according to the U.S.

A new study suggests stress levels along Southern California's San Andreas and San Jacinto fault systems are at their highest ...

Thursday's tremors were the fifth earthquake of the month recorded in South Carolina.

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

The Pacific Northwest Seismic Network will stream real-time data tracking fan-created seismic activity at Seattle Stadium ...