Chile's 9.5-magnitude earthquake (1960) killed 1,655 people and was the largest ever recorded, as per US Geological Survey data. Second was a 9.2-magnitude earthquake in Alaska (1964) that killed 130 people and caused $2.3-billion damage. Third was the Sumatra-Andaman Islands earthquake, which killed over 2,80,000 people. In 10th place is an 8.6-magnitude earthquake in Arunachal Pradesh (1950).