There were no immediate reports of injuries or damage.
Saturday's quake struck about 75km off the port city of Talcahuano on the Bay of Concepcion.
Talcahuano hosts a key naval base and is the main industrial and fishing port in the region.
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A picture made available on 10 June 2015 shows a general view of the Estadio Nacional stadium in Santiago, Chile. (EPA) Source: EPA
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