(Reuters) - A 6.1-magnitude earthquake struck northern Chile, 144 km (90 miles) southeast of Calama, at a depth of 188 km, the United States Geological Survey (USGS) said on Saturday.

The earthquake had a preliminary magnitude of 6.2 and struck at about 5:15 a.m. (0815 GMT), USGS said.

There were no immediate reports on social media of damage or casualties.