Tsunamis


have occurred on many occasions all around the world. These massive waves have been caused by eruptions, landslides, earthquakes, and other natural disasters. Each tsunami may be different from the next thus preventing the exact measurements and dynamics to be pinpointed. In recent years though, more efficient and precise methods of detection have been developed, providing us with increased knowledge about the mysterious monster wave in addition to warning locations before they are hit.
Tsunami, a Japanese word, means łgreat wave in harbor.˛ They have frequently brought death, destruction, and eventual economic hardships to Japan in its harbors and coastal villages. Consequently, the ...

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misconception that a tsunami is a tidal wave. Although the impact of a tsunami on a coastline may change depending upon the tidal level at the time when one occurs, tsunami waves are unrelated to tides. Instead, tides are the product of imbalanced gravitational forces coming from the planets, the Sun, and most of all, the Moon. In the open, the water level may rise and fall several feet as a tsunami passes by. However, tsunami frequently go undetected by ships because the water takes approximately 10 to 30 minutes to reach it highest level and fall back down. As a tsunami approaches the coastline, it can form a deadly wall of water that rises more than 100 feet (30 meters) high.
The most frequent cause of are earthquakes. These earthquakes are stimulated by the upward or downward thrust of a block from the ocean floor. This process is called submarine faulting. These fault movements are often followed by earthquakes are referred to as łtsunamigenic earthquakes˛. An ...

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of equilibrium could potentially be the driving force of a tsunami as well. A landslide that initiates above sea level and then plunges into the sea or takes place entirely under water can interrupt the balance of of the overlying water column as the sediment is redistributed across the basin. Such submarine landslides may accompany the collapse of volcanic structures or large earthquakes. On July 9, 1958, the largest tsunami waves produced by a landslide occurred at Lituya Bay in Alaska. Higher than 1,740 feet above the shoreline with a 525 meter splash-up, it is surprising that they were generated solely by a massive rockslide which had resulted from an ...

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"Tsunamis." Essayworld.com. July 27, 2004. Accessed July 22, 2018. http://www.essayworld.com/essays/Tsunamis/11649.
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PAPER DETAILS
Added: 7/27/2004 04:06:40 AM
Category: Science & Nature
Type: Premium Paper
Words: 3181
Pages: 12

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