An 8.8 magnitude earthquake — one of the most powerful in recorded history — struck off the coast of Russia Tuesday, prompting tsunami watches and warnings around the globe. But how does it measure up ...

The United States Geological Survey put out a false alarm for a 5.9 earthquake east of Dayton, Nevada, on Thursday morning.

Thursday's non-quake highlighted the need for better earthquake-warning tools. Three western states have a system in place, ...