There have been a number of devastating tsunamis in Indonesia over the years. The most recent one struck in December 2004, killing more than 230,000 people.
Tsunamis are caused by underwater earthquakes, which thrust huge volumes of water towards the surface. When the waves reach shore, they can reach heights of more than 30 metres.
Indonesia is located in an area of high risk for tsunamis, and has been struck by numerous waves in the past. The most devastating …