Nov 10 (Reuters) - A strong, 6.6 magnitude earthquake struck off the coast of Chile on Tuesday, the U.S. Geological Survey said.

The quake, initially reported as a magnitude 6.8, was at a fairly shallow depth of 23.6 miles (38 km) under the seabed. Its epicenter was 67 miles (108 km) northwest of Coquimbo.

The earthquake did not trigger a tsunami, the Pacific Tsunami Warning Center said.

(Reporting by Sandra Maler; Editing by Peter Cooney)

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