A tsunami is a series of vast waves in a water body, generally an ocean or large lake, caused by the displacement of a large volume of water.... They generally consist of a number of waves as they arrive in a so-called “ wave train ”.... They can be several metres high, and can cause devastating destruction. Among the deadliest natural disasters in history was the 2004 Indian Ocean tsunami, which left at least 230, 000 people killed or missing in 14 countries. This tsunami was caused by a 9.3