The quake struck 400 miles west of Puerto Aisen at a depth of 6.2 miles, the USGS said.
It said the quake had occurred at 5:49 a.m. Chile time (0943 GMT)
Chile's emergency office said on Twitter that the quake did not have the conditions necessary to generate a tsunami. It added the quake was not felt in the country.
The USGS pinpointed the quake in the Nazca tectonic plate area. - Reuters: 6.8M: Earthquake Strikes off Chile; No Tsunami Seen
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