5. Tsunami, 2004 With the magnitude of 9.1–9.3, it was the third largest earthquake of the world recorded ever in Banda Aceh, Indonesia.
Almost 227,898 people died in the tsunami that struck the Indian Ocean rim countries of India, Sri Lanka, Thailand, Indonesia and Maldives.
The earthquake had the longest duration of faulting ever observed, between 8.3 and 10 minutes.
Experts say the earthquake that caused tsunami was so powerful that its impact can be equated to the energy of 23,000 Hiroshima-type atomic bombs.
The huge waves of tsunami killed lakhs of people in South India, Sri Lanka, Andaman and Nicobar Islands.