One of the most powerful and feared natural disasters, the large and destructive water wave known as a tsunami can challenge a jet airplane for speed. Near the coast it can beat a three-story building for height. These waves pack enough energy to destroy an entire coastal community in moments. Underwater earthquakes and volcanic eruptions are the most common causes of tsunamis.
"Tsunami." Britannica School, Encyclopædia Britannica, 13 Aug. 2017. school.eb.com/levels/middle/article/tsunami/313897. Accessed 4 Sep. 2017.