Aug. 11 (Bloomberg) — A magnitude-7.6 earthquake struck the Andaman Islands in the Indian Ocean today, spurring a tsunami warning for a half-dozen countries in the region.

The quake struck at a depth of 33 kilometers (21 miles) at about 1:55 a.m. local time and was centered 260 kilometers north of Port Blair in the Andaman Islands, or about 825 kilometers west of Bangkok, the U.S. Geological Survey said.

A tsunami warning will be in effect for the next one to three hours for parts of India, Sri Lanka, Myanmar, Indonesia, Thailand and Bangladesh, according to the Japan Meteorological Agency.

The U.S. Pacific Tsunami Warning Center said a potentially destructive tsunami had been generated near the quake epicenter. No other details were provided.

A magnitude-9.1 earthquake that hit off the coast of Aceh in northern Sumatra in December 2004 triggered a tsunami that swept across the Indian Ocean, leaving more than 229,000 dead or missing from Southeast Asia to eastern Africa.