Large quake hits off India's Andaman Islands
The USGS said the quake, initially reported as a magnitude 7.7, was 20.6 miles (33 km) deep and was centered 160 miles (260 km) north of Port Blair in the Andaman Islands.
The Pacific Tsunami Warning Centre issued a tsunami watch for the region.
(Reporting by Sandra Maler, editing by Doina Chiacu)