Changes

[[Earthquake]]s under the [[Sea Bed|sea bed]] cause a large volume of water to be displaced due to a large output of [[energy]]. This water then [[energy]] creates a large wave that travels across through the water at up too 500km/h and can reach a height of up to 30m500kmph.When tsunamis reach the [[coast]] [[friction]] builds between the much more [[shallow]] [[Sea Bed|sea bed]] and the high speed energy of the waveas there is less water for the [[energy]] to travel through. This friction causes the wave the to slow down as friction builds and therefore as it slows down the height of the wave increases. After this increase in height Tsunamis can reach up to 40m 100ft as they come in contact with land.