Tsunamis have occurred on many occasions all around the world. Volcanic eruptions, landslides, earthquakes, and other natural disasters have caused these massive waves. A tsunami is a towering ocean wave generated by tectonic displacements such as undersea earthquakes, landslides, cosmic collisions, or volcanic eruptions. There is a common misconception that a tsunami is a tidal wave. Although the impact of a tsunami on a coastline may change depending upon the tidal level at the time …showed first 75 words of 775 total…

…showed last 75 words of 775 total…correlation to their wavelength. When the water depth is less than 1/20 if the wavelength the form is known as a shallow-water wave. Its speed is determined solely by the depth of the water. Because tsunamis occur in the Pacific, a basin less than 3 miles deep, they are considered shallow-water waves. One of the most memorable tsunamis in history to ever occur hit Hawaii on April 1, 1946. Today the Tsunami Warning System of the Pacific has grown.