More than 200 small quakes recorded since a 4.8-magnitude event near Tewksbury raise questions about reactivated ancient ...

USGS released its most detailed national geologic map, offering layered views of geology beneath the Earth’s surface across the lower 48 states. The Cooperative National Geologic Map integrates data ...

Add Yahoo as a preferred source to see more of our stories on Google. A magnitude 2.7 earthquake rattled parts of central Oklahoma late Tuesday, according to the U.S. Geological Survey. The quake ...

A shake alert went out over the U.S. Geological Survey's early warning system on Dec. 4, warning that a 5.9 earthquake near Carson City in western Nevada could produce heavy shaking in the region. But ...

Did you feel it? A 3.0 magnitude earthquake struck Snohomish County Tuesday morning and was felt in King and Pierce counties.