A magnitude 6.8 earthquake struck off the coast of Chile on Monday, May 20, the U.S. Geological Survey said, but Chilean emergency authorities said they saw no prospect that the tremor would generate a tsunami, according to Reuters.

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 am 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.