Oceanic Waves-Tsunami

Topics: Tsunami, Pacific Tsunami Warning Center, 2004 Indian Ocean earthquake Pages: 3 (1355 words) Published: May 17, 2011
`1) Oceanic waves mean the forward movements of the ocean’s water caused by oscillation of water particles by frictional drag of wind over the Earth’s surface. It can be caused by the movement of Earth’s crust aka an earthquake. Like every wave, oceanic waves have highest and lowest points. The peak of thewave is called crest while the lowest point is called trough. The wavelength is the horizontal distance between two troughs or crests. 2)The Largest and most dangerous of oceanic waves is called tsunami or tidal waves. It’s wave could reach up to thousands of feet tall. 3)Tsunami is word originated from japan, and it’s equivalent in English is called “seismic sea waves.” There are many factors causing Tsunami. Most tsunamis that has occured in the past few years are caused by the down drop or upthrust of the Earh’s crust that results in Earthquke. It can also a large-scale undersea landslide, a high degree of submarine volcanic eruption, and can also be caused by the impact of large meteor in the sea. 4)The most dreadful Earthquake ever recorded was the 2004 Indian Ocean Tsuanmi, with more than 200,000 deaths in Asia. a)

5)There’s no possible way to prevent a Tsunami since it is a natural disaster. But over the years, people have been working hard to find an effective way to predict this calamity and how to reduce the effects as well. The most common way to predict if a tsunami is by using seismograph. Seismograph is a device used to measure the magnitute of an Earthquake. This device exist since the ancient times by the Chinese people and has saved lives of numerous people. The current form is much more compact and reliable than the old one, thanks to the modern technology we have now. The picture beside is a photo of a modern seismograph used by the British Geological Survey. Seismograph is handy and provide quick and accurate results. It also provides a wide range of earthquake results so after an earthquake happens, the goverment could predict...
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