tsunami

Tsunami is a Japanese word. 'Tsu' meaning habour and 'nami' meaning big wave. Untill recently tsunami's used to be called tidal waves even though they have nothing to do with tides. A tsunami is a series of huge waves that happen after an under sea disturbence, such as an earth quake or volcanic eruption. the waves can travel from speed as fast as 450 miles an hour they can also reach hights up to 100 feet.