A tsunami, also known as a seismic sea wave or as a tidal wave, is a series of waves in a body of water caused by the displacement of a large volume of water, generally in an ocean or a large lake.
Based on the text, severe earthquakes could cause chunks of earth underneath bodies of water to scrap each other and send a massive wave and cause a tsunami.
As we did research in the internet, we also found out that volcanic eruptions can also cause tsunamis. When a volcano erupts, a part of it collapses, and that part causes a fast-moving debris avalanche and crashes to a body of water, which causes a disastrous wave and finally produce a tsunami.
It is stated in the text that warning signs can be produced by animals, They give warning signs by trying to go above ground and basically acting unusual. Some examples are crabs scuttling out of the sea, elephants stomping the ground continously, and dolphins madly jumping towards a direction.
-Tsunami waves can be as huge as 100 feet. -Tsunamis can travel as fast as 5000 miles per hour, without being noticed and can cross the entire ocean in less than a day. -Tsunami is a term, which literally means a harbor wave. A term specific to Japan.