Survive The Disasters

######## are giant waves caused by earthquakes or volcanic ######### under the sea. Out in the depths of the ocean, tsunami waves do not dramatically increase in height. But as the waves travel inland, they build up to higher and higher heights as the depth of the ocean decreases. The speed of tsunami waves depends on ocean depth rather than the distance from the source of the wave. Tsunami waves may travel as fast as jet planes over deep waters, only slowing down when reaching shallow waters. While ######## are often referred to as ##### waves, this name is discouraged by ############## because tides have little to do with these giant waves.