This study aimed to study. The cause of the tsunami Situation and moving the tsunami and the impact of the tsunami. The results showed that Cause a tsunami. The earthquake in the Indian Ocean Become a fault caused massive tsunami in 13. Neighboring countries And earthquake was also felt the country. When the tsunami struck the coast, it has a population of some of the survivors fled to higher ground. And some who died from a tsunami. Affected by the tsunami, the cause of the population died, including 13 countries, more than 223,000 people and has lost more than 40,000 people and has an effect on marine plants in a natural death and affect the ecosystem in the sea.