How Do Tsunamis Form? The Science Behind the Waves - Tsunamis form when massive amounts of water are displaced due to earthquakes, volcanic eruptions, landslides, or even rare meteorite impacts. These waves can travel across the ocean at speeds of up to 500 mph. In deep water, they may seem small, but as they approach shallow coastal areas, they slow down and grow in height, causing catastrophic flooding and destruction when they reach land. #shorts #shortsfeed #tsunami #science