TSUNAMI!

摘要

Undersea earthquakes can generate a potentially lethal cascade: a fault break can cause movement of I the seaf loor, which displaces the water above to form a tsunami wave. Tsunamis can also be generated when earthquakes trigger undersea slumping of sediments, although these waves are generally more modest in size. Tsunami waves spread out through the ocean in all directions, travelling in the open ocean about as fast as a jet airplane.