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feature of tsunami |
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Answer» Tsunami waves are very different from tidal waves. A tidal wave is by definition a wave caused by ocean tides, whereas a tsunami is almost always caused by anearthquakeunder water. Tsunami waves are also very different from normal wind-generated waves, which many of us may have observed on a local lake or at a coastal beach. Observers of a tsunami will understand these waves are more like a fast moving tide crashing into the shoreline. Furthermore, tsunami waves are much faster than wind-generated waves. A further feature of tsunami waves is that these high-speed waves lose very little energy as they travel across the open ocean, because the rate at which a wave loses its energy is inversely related to its wave length. That is why they only propagate at high speed and with limited energy loss are capable of traveling great transoceanic distances. |
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