In 2004 Indian Ocean tsunami killed more than 300,000 people, according to the US National Geophysical Data Center. The deadliest tsunami in recorded history was triggered by the second-largest earthquake in recorded history, at magnitude 9.3, in the ocean near Indonesia's Sumatra island. The wave measured higher than 80 feet, which is still much lower than the 1,742-foot-high Lityua Bay tsunami of 1958, considered the tallest-ever.