Velocity equals the square root of the product of the water depth times the acceleration of gravity. Tsunamis travel approximately 475 mph in 15,000 feet of water. Tsunami velocity depends on the depth of water through which it travels. Tsunami (soo-NAH-mee) is a Japanese word meaning harbor wave. Tsunamis generated by strike-slip earthquakes normally affect regions near the source only. The waves are likely generated by associated landslides or motion of a sloping bathymetric feature. This type of earthquake is less likely to trigger a tsunami than one with vertical motion. Yes, approximately 10-15% of damaging tsunamis are triggered by strike-slip earthquakes. Approximately every 15 years a destructive, ocean-wide tsunami occurs.Ĭan strike-slip (horizontal motion) earthquakes trigger tsunamis? On the average, two tsunamis occur per year throughout the world which inflict damage near the source. Tsunamis are also triggered by landslides into or under the water surface, and can be generated by volcanic activity and meteorite impacts. The most common cause of a tsunami is sea floor uplift associated with an earthquake. Tsunamis are generated by any large, impulsive displacement of the sea level. This is why tsunamis cause so much damage! With typical waves, water flows in circles, but with a tsunami, water flows straight. Tidal waves are caused by the forces of the moon, sun, and planets upon the tides, as well as the wind as it moves over the water. A tsunami is a large ocean wave usually caused by an underwater earthquake or a volcanic explosion.
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