WASHINGTON/SANTIAGO - A magnitude 6.2 earthquake struck the northern coast of Chile on Saturday, the said, but there were no immediate reports of damage or casualties.
The quake was located 63 miles (101 km) northwest of the copper-exporting port of and had a depth of 7.1 miles (11 km), the USGS said.
It was followed by aftershocks of 5.2 and 5.5 magnitude in the same area.
Chile's ONEMI emergency office said it had received no reports of damages and that basic services were operating as normal.
There was no immediate threat of a tsunami, according to the Pacific Tsunami Warning Center.
Chile's massive mines are clustered in the mineral-rich north.
Earthquakes are frequent in the region and generally do not cause damage.