TSUNAMI

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Tsunami is a natural disaster caused by the increasing waves of the sea to land with a high swiftness as the consequence of the quake which is centred under the ocean. The quake can be caused by land erosion, sifted plate, an erupted volcano as well as a meteoroid that falls in the ocean. Tsunami usually happens if the size of the earthquake exceed until 7 on the Richter scale. This tsunami is quite dangerous, mainly for those who live around the beach. With great force, it will sweep out whatever around it. From all causes of tsunami, earthquake is the major cause.

An earthquake on the bottom of sea gives rise to an affliction of the sea water that caused by the change of the profile of the ocean floor that generally occurs because of a tectonics earthquake and perpendicular (vertical) ground motion with the surface of the sea water or earth surface. If the movements of the ground are horizontal on the surface of the sea, there will not happen tsunami.