Play word スマトラ沖地震 スマトラ沖地震 スマトラおきじしん Sumatra-Andaman earthquake (2004, resulting in the Indian Ocean tsunami)
Play word 三陸沖地震 三陸沖地震 さんりくおきじしん Sanriku offshore earthquake (esp. June 15, 1896, March 3, 1933, and March 11, 2011)