What causes tsunami?Please give big answer
Answers
Answer:
Tsunamis are caused by violent seafloor movement associated with earthquakes, landslides, lava entering the sea, seamount collapse, or meteorite impact. The most common cause is earthquakes. See the percentages on the right for the geological events that cause tsunamis. Note that 72% of tsunamis are generated by earthquakes. A disturbance that displaces a large water mass from its equilibrium position can cause a tsunami.
In order to understand the role of violent seafloor movement as a major cause of tsunamis, one needs to understand plate tectonics. Earth’s surface is made up of a number of plates that contain both the continents and the seafloor. They move relative to each other at rates of up to several inches per year. A plate boundary is the area where two plates come into contact. The way one plate moves relative to another determines the type of boundary: spreading, where the two plates move away from each other; subduction, where the two plates move toward each other, with one sliding beneath the other; and transform, where the two plates slide horizontally past each other. Subduction is the main cause of major tsunami events.
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☯ ωhατ cαυsεs τsυηαmɩ?
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❄ The waves are formed due to volcanic eruption on the ocean floor or due to earthquake at the bottom of the ocean.
❄ The energy released because of the earthquake pushes the water upwards. This results in formation of waves.
Additional knowledge -
☞ ❝Tsunami❞ means huge harbour wave which break at the coastal regions causing tremendous damage.
☞ These waves are not very high near the source, but they spread rapidly to long distances.
☞ The velocity of these waves is 800 to 900 kilometre per hour.
☞ Upon reaching the coastal area, their velocity is reduced, but their height increases tremendously to about 30 metres. This causes a great damage.