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Tsunamis are one of the most dangerous natural disasters known to mankind that cause devastating effects on society. Despite the fact that tsunamis are not frequent phenomena, it causes huge causalities once it occurs. The number of deaths could reach 420 thousand a year, accompanied by the destruction of many costal residences. But despite the fact that tsunami damages are inevitable, it can be reduced.
The word tsunami was originated from the Japanese words “Tsu” meaning “harbor”, and “Nami” meaning “wave”. It is believed that ancient Japanese sailors used this word because they were able to predict the arrival of Tsunami huge waves from observing the unusual wave activity nearby harbors. But that is most likely untrue because predicting the time and location of an upcoming tsunami is nearly impossible till this very day (Bernard et al. 3).
In the past, there was some kind of confusion between tsunami and other phenomena that generated similar large waves such as storm waves. Some other people used to think that the tsunamis were tidal waves that are caused by the gravity of the moon and the sun due to the similarity in its appearance to the tides. However, the origin of tsunami differs greatly from the origin of the tides. A tsunami can be generated from different sources (Cartwright and Nakamura 152).
Submarine volcanic action is one of the sources that can generate tsunamis, yet, most of it are born when plates forming earth crust starts moving. The lighter continental plates bury the dense oceanic plates resulting in an abrupt shaking of the ground, a phenomenon known as earthquakes. Most of which are violent but despite how big or small an earthquake is, all are able of generating devastating tsunamis as long as it occurs...
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...the Term and of Scientific Understanding of the Phenomenon in Japanese and Western Culture.” Notes and Records of the Royal Society of London, 62.2 (Jun. 20, 2008): 151-166. JSTOR. Web. 16 Nov. 2013
Collins, Larry. "USAR Response to Japan Earthquake and Tsunamis, Part 1." Fire Engineering (2011): 85-90. ProQuest. Web. 16 Nov. 2013 .
Lomnitz, Cinna. "The Science Behind the Asian Tsunami." Harvard Asia Pacific Review (2005): 17-8. ProQuest. Web. 16 Nov. 2013
Sieh, Kerry. “Sumatran Megathrust Earthquakes: From Science to Saving Lives.” Philosophical Transactions: Mathematical, Physical and Engineering Sciences. 364.1845 (Aug. 15, 2006): 1947-1963. Extreme Natural Hazards. Web. 16 Nov. 2013
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"What the Tsunami Wrought." The Economist (Online) 11 Mar. 2012. ProQuest. Web. 16 Nov. 2013
Works Cited Charles F. Walker, Shaky Colonialism: The 1746 Earthquake-Tsunami in Lima, Peru, and Its Long Aftermath, Duke University Press, 2008. Shravan, G. The New York Times Company. 2012. The. 0.
Imagine if a 9.0 earthquake struck the West Coast today, resulting in a giant tsunami. Coastal towns would be washed away or completely isolated, and electricity would be lost (FOX5). There would be $70 billion in damage and people would only have 15 minutest to evacuate or move to higher ground resulting in 10,000 deaths (FOX5). This sounds like a plot for a scary movie, but this is actually a reality. The Oregon Coast in located on a subduction zone, which makes it very susceptible to major earthquakes and tsunamis. With the Cascadia subduction zone running along he West Coast the threat of a major tsunami is very real.
Because rogue waves are located out in the ocean, they do not cause very much damage except for a couple unlucky boats. They are also incredibly rare, so even if they caused a lot of damage, it would not be very frequently. As for tsunamis, damage is much more common. Tsunamis do not cause very many deaths because of advance warning systems and they can be seen in the distance, but they do cause a lot of damage to the land it crashes on. They are very devastating because a lot of damage comes from each individual wave. It is pretty obvious how different the toll the waves take on the things they target can
Gordon, Mary, and Cameron King jr. "Earthquake and Fire in San Francisco." University of California Press. 48.1 (1985): 69-79. Web. 5 Mar. 2014. .
A tsunami is a series of waves “created by an underwater disturbance such as an earthquake, landslide, volcanic eruption, or meteorite” (ready.gov). Tsunami waves are quite different from normal waves. Once a tsunami is set in motion there is no way to really “prevent” it fully, or to stop such an event. Precautionary steps can be taken, such as in Japan where a sea wall was built to protect people and property. However, this was a futile attempt since in 2011 a tsunami was able to surge over the wall, with the water building up and rushing over the top. The lesson learned is that one should not
Tsunamis can go the same speed as a jetliner and that massive wave can out run the fastest runner. When there is a lot of waves at once, or the water goes back that is a sign that a tsunami is coming. If that tsunami is far then people need to get to the tallest and strongest building there is in the city that way they are safe and helicopter can pick them up. Tsunamis can wipe out an entire city or 1/4 of the country. Tsunamis can last up to an hour, or more.
To determine how the fire prevention systems in a structure weather an earthquake, a test was conducted at the University of California, San Diego, in 2012. The test was preformed outside on a 5 story building, located on an
Additionally, this earthquake occurred on a thrust fault. This fault was a subduction zone slip which occurred primarily beneath the ocean were the Pacific plate plunges underneath the North American plate. This sudden upward movement of the sea floor along the rupturing fault generated a massive tsunami. This vertical deformation
Johnson, Renee. Japan’s 2011 Earthquake and Tsunami: Food and Agriculture Implications. Darby: DIANE Publishing, 2013. Print.
While the early warning saved thousands of people, the Japan’s Meteorological Agency underestimated this earthquake as the subduction zone of Japan should not produce the magnitude 9.0 quake (Oskin, 2013a). The Tohoku Earthquake and its tsunami approximately killed 16 thousand people, injured 6 thousand people and around 3 thousand people were missing. Most people died from drowning. Around 300 thousand buildings, 4000 roads, 78 bridges, and many more were affected by the earthquake, tsunami, and fires from leaking oils and gas. Electricity, telecommunication, and railways were severely damaged. The debris of 25 million tons was generated and carried out to the sea by water (BBC News, 2012). The country’s authorities estimated more than 309 billion US dollars of damages. Landslides occurred in Miyagi and liquefaction in Chiba, Tokyo, Odaiba, and Urayasu (USGS, 2013). Furthermore, the tsunami destroyed protective tsunami seawalls. Approximately 217 square miles of Japan covered in water (Oskin,
Gammon, Crystal. "Massive Sea-floor Shove Triggered Japan's Tsunami." LiveScience. TechMedia Network, 02 Dec. 2011. Web. 16 Mar. 2014.
...d out the leakage a year later. Another cause of the disaster is that government ignored the chance of tsunami. Scientists warned about the dangerousness of tsunami, and advised them to build more protection to tsunami threatening. However, the government did not consider the advise (IAEA, 2011)
There was a multitude of causes of the disaster in Japan. The first cause was a 9.0 magnitude earthquake that occurred off the coast of Japan. Japan is located in “The Ring of Fire,” an area in the Pacific Ocean that has multiple faults and earthquakes (Pedersen 13). Tectonic plates shifted off the North Pacific coast of Japan and created a massive earthquake. The next cause was a thirty-three foot wall of water that swept over cities and farmland in Japan (Branigan 2). Martin Fackler, a journalist, stated, “The quake churned up a devastating tsunami” (Fackler 3). The tsunami reached speeds of 497 miles per hour while approaching Japan (Fackler 3). The third and final reason of the disaster was that the cooling systems at multiple nuclear power plants failed. At Fukushima, a nuclear power plant in Sendai, Japan, the radioactive rods began to overheat due to the absence of water, which cools it. Explosions occurred at three of the reactors, which spewed radiation into the air (“Comparing nuclear power plant crises”). In conclusion, the earthquake, tsunami, and nuclear power plant issues were the causes of the disaster in Japan, but they also had a myriad of effects.
Earthquakes belong to the class of most disastrous natural hazards. They result in unexpected and tremendous earth movements. These movements results from dissemination of an enormous amount of intense energy in form of seismic waves which are detected by use of seismograms. The impact of earthquakes leaves behind several landmarks including: destruction of property, extensive disruption of services like sewer and water lines, loss of life, and causes instability in both economic and social components of the affected nation (Webcache 2).
The word “tsunami” comes from the Japanese, in which “tsu” stands for harbor and “nami” means wave. Another name for tsunamis are seismic sea waves. A tsunami is defined as an ocean wave with long wavelengths that are produced by a landslide, volcano, or earthquake. After a tsunami is generated, the waves move very rapidly across the ocean, reaching speeds over 435 miles per hour. In open and deep waters, a tsunami may have a wavelength of 125 miles and a height around 1.5 feet making it almost impossible to recognize. However, when a tsunami hits shallower waters, the height of the wave starts to increase. Shallow waters cause the waves to slow down, which results in a shorter wavelength. Once a wave reaches the shoreline, a tsunami can amazingly reach as high as 130 feet up in the air. Often, tsunamis are mistaken as tidal waves, but they are not the same thing. Tidal waves are ocean waves like tsunamis, but tidal waves take place in shallow waters