The U.S. Geological Survey says its depth was 626 kilometers , or 385 miles . The quake struck at a depth of 626 kilometers , or about 390 miles below the earth 's surface , the Geological Survey said on its website . The Pacific Typhoon Warning Center says a ` ` destructive tsunami was not . '' The earthquake 's epicenter was estimated as 74 miles south - southwest of Fiji 's Lau Island .
The U.S. Geological Survey says its depth was 626 kilometers , or 385 miles . The Pacific Typhoon Warning Center says a ` ` destructive tsunami was not . '' The earthquake 's epicenter was estimated as 74 miles south - southwest of Fiji 's Lau Island .