A magnitude 6.8 earthquake struck northern Chile early Wednesday morning, the GFZ German Research Center for Geosciences (GFZ) said.

The quake struck at a depth of 145 kilometers (90 miles), GFZ added.

The U.S. Geological Survey (USGS) placed the quake's epicentre about 62 kilometers southwest of San Pedro de Atacama. 

There were no immediate reports of casualties or damage.