Tsunami is a series of waves in the water body caused by the displacement of a large volume of water. There are several reasons why. First, earthquakes because of the movement of the earth's crust. Second, occurrence of volcanic eruptions is because when the volcano erupted will vibration of the water surface. Finally, tsunami caused many people to die, injuries and a lot. The patient was frightened because many people lost their siblings and were without residences.
Jirapaporn Thinbuaban 