When a storm or a cyclone emerges in the ocean, large and powerful waves are generated. After the storm is over, the shape of the waves changes. They attain height, develop longer length and spread up to hundreds of kilometres from the place of their origin. When they reach the seacoast, they cause heavy damage. So these waves are called ‘devastating waves’.
When a large boulder or a glacier breaks near the seacoast and falls into the sea, or a shooting star falls in the sea, similar large waves occur.