Science - Digital Education Resources. Pacific Tsunami Simulation - Japanese Earthquake. Rare Video: Japan Tsunami. Tsunami Facts, Tsunami Information, Tsunami Videos, Tsunami Photos. A tsunami is a series of ocean waves that sends surges of water, sometimes reaching heights of over 100 feet (30.5 meters), onto land.
These walls of water can cause widespread destruction when they crash ashore. These awe-inspiring waves are typically caused by large, undersea earthquakes at tectonic plate boundaries. When the ocean floor at a plate boundary rises or falls suddenly it displaces the water above it and launches the rolling waves that will become a tsunami. Japan tsunami: One Year On.