1 explosion severely of the volcano near the sea
2. The landslide collapse under or near shore
3. By rocks fall in the bay or ocean
4. Changes in the earth's crust with strong tectonic earthquake
5.The big explosion underwater nuclear
.Generally speaking, the The tsunami caused by the motion of the ocean floor in the vertical due to tectonic from earthquake, which is a large part of the moving horizontally. Usually the mountain water.The size is not big on vertical movement up and down of the ocean floor, while the earthquake. Is associated with the height of the river rise when vibration particle water shall เพื่อม, up and down
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