Jakarta, Indonesia (CNN) — A massive earthquake struck off the coast of the Indonesian island of Sumatra Wednesday afternoon, triggering a tsunami watch for the Indian Ocean, which was later canceled.
The quake struck about 434 kilometers (270 miles) southwest of Banda Aceh, the capital of Indonesia’s Aceh province, and had a magnitude of 8.6, the U.S. Geological Survey said. It took place at a depth of 23 kilometers (14 miles).
A second large quake, with a magnitude of 8.2, occurred off the west coast of Sumatra about two hours later, the USGS said.
Gary Gibson from the Seismology Research Center in Melbourne, Australia, said the location of the second quake reduces the possibility of a tsunami.