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Tsunamis: Which of the following properties of Tsunamis are correct?(A) Tsunamis are short-period waves (2-20 s) with wavelength from tens to hundreds of meters;(B) Tsunamis are gravity waves similar to ocean waves , but non-dispersive;(C) On the ocean the maximum amplitude is 0.5 - 1.5 m and the speed between 700 and 900 km/h;(D) The maximum height of a tsunami is between 2 and 6m;(E) Tsunamis can be caused by strong earthquakes, mass movements and by volcanic eruptions;(F) The run-up of a tsunami is its maximum speed;(G) In the case of earthquakes, a vertical displacement of the water column is needed to induce a tsunami;
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