Do you ever think about what goes on at the bottom of the ocean? It is probably a lot more than you think! Volcanoes can start at the bottom of the ocean. Earthquakes can happen there, too. No big deal, right? No people. No buildings. No danger. No one can get hurt out in the middle of the ocean, right? Wrong. A powerful earthquake or volcanic eruption can kill many people, even when it happens in the middle of the ocean! When they happen at the bottom of the ocean, they make the water move. Rippling waves .....