Tsunami waves occur from many causes together as follows: 1. the severe blow of the volcano near the sea. 2. scroll to the undersea earthquake or tsunami near the coast. 3. the originating from the ocean or Bay on rocks.
The tsunami caused by many reasons as follows: 1 explosion severely of the volcano near the sea 2. The landslide collapse under the sea. Or near shore 3. By rocks fall in the bay or ocean.