Tsunami sometimes called seismic sea waves is a series of sea waves created by underwater disturbances such as underwater earthquakes, landslide or volcanic eruptions.
Tsunamis can move so fast such as hundred miles per hour and waves can be as high as 100 feet or more. Tsunamis are dangerous and destructive.
One of the most destructive tsunamis in history is the tsunami that hit the North Pacific Coast of Japan, in March 11, 2011. It almost killed more than 18,00o people. See the image below
