Indian Ocean nations were on tsunami watch on April 11 following two major earthquakes off the coast of Sumatra in Indonesia. Below is a list of the world's deadliest earthquakes, including quake-induced tsunamis, over the past century.
2011: Japan: more than 19,000 were killed when a tsunami triggered by an undersea quake slammed into the north-east coast, triggering a nuclear crisis at the Fukushima Daiichi atomic plant. Magnitude 9.0.
2010: Haiti: between 250,000 and 300,000 dead. Magnitude 7.0
2008: Sichuan province, China: 87,000 dead or missing. Magnitude 8.0.
2005: Indian and Pakistani Kashmir: at least 75,000 killed. Magnitude 7.6.
2004: Indian Ocean: more than 226,000 died when a tsunami sparked by an undersea earthquake off Indonesia hit countries around the Indian Ocean. Magnitude 9.1.
1976: Tangshan, Hebei Province, China: officials said 242,000 people died, although some western sources said the toll was higher. Magnitude 7.8.
1970: Mount Huascaran, Peru: earthquake and resulting avalanche killed 66,800. Magnitude 7.5.
1939: Erzincan, Turkey: 35-40,000 killed. Magnitude 8.0.
1935: Quetta, India (now Pakistan): more than 50,000 killed. Magnitude 7.6.
1932: Gansu province, China: around 70,000 died. Magnitude 8.0
1927: Nanshan province, China: up to 200,000 dead. Magnitude 8.0
1923: Yokohama, Japan: more than 142,000 people died in the Great Kanto earthquake and resulting fire, which destroyed Tokyo. Magnitude 8.2.
1920: Gansu, north-western China: more than 100,000 killed. Magnitude 8.5.