A magnitude-6,3 earthquake struck north-eastern Nevada on Thursday, the United States Geological Survey reported.
There were no immediate reports of damage in the nearest large city, Salt Lake City, Utah, although some residents were shaken by the morning quake, local radio said.
The quake, centred 18km south-east of Wells, Nevada, struck at 2.16pm GMT, with a shallow epicentre 10km deep.
Wells, a town of about 1 300 people, is 614km north of the gambling centre of Las Vegas and 244km west of Salt Lake City. — Reuters