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Tsunami |
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tsunami note: there are variations in how different browsers display the text such as between internet explorer and firefox. |
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About |
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A tsunami (pronounced soo-ná-mee) is a series of enormous waves created by an underwater disturbance such as an earthquake, landslide, volcanic eruption, or meteorite. It can move hundreds of miles per hour in the open ocean and smash into land with waves as high as 100 feet or more. A tsunami's more common name is tidal wave |
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From the area where the tsunami originates, waves travel outward in all directions. Once the wave approaches the shore, it builds in height. It then weaves a path of destruction very quickly. |
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The topography of the coastline and the ocean floor determines the size of the wave. There may be more than one wave. Successive waves can be larger or higher than their predecessor. For this reason, a small tsunami at one beach can become a giant wave a few miles away. A tsunami is hazardous although it may not damage every coastline it strikes. In the United States, the most susceptible areas are the coasts of California, Oregon, Washington, Alaska, and Hawaii. |
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Typically, an earthquake or landslide in the ocean generates a tsunami. The first wave in a series can reach the coastline in a matter of a few minutes. In fact, there may be no time for a warning. |
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Areas less than 25 feet above sea level are more likely at risk. Drowning is the most common cause of death associated with a tsunami. Other hazards include contamination of drinking water, and fires from gas lines or ruptured tanks. |
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Due to the great Tsunami off of Asia in December 2004, cities have become more vigilant in preparing for a possible occurrence. San Francisco and Huntington Beach, two California cities, have been certified by the US Weather Service as Tsunami Ready. |
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Before and During |
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Here are some precautions you should take before and during a tsunami.
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After |
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