The quake, which hit at 2:54 a.m. local time Monday, was centered in the ocean, 312.9 kilometers (194 miles) south southeast of Ushuaia, Argentina, and 552 kilometers (342 miles) south southeast of Punta Arenas, Chile.
The agency said the quake was at a relatively shallow depth of 10 kilometers (6 miles).
More about: South-America earthquake