Tsunami is a Japanese word meaning ‘harbour wave’.High sea wave occurs when a large amount of water displaced due to earthquake or volcano happening under the sea. These waves are very strong and spread throughout the places close to the sea. There are many reasons which can cause a Tsunami. It can happen because of an earthquake or blogger.comted Reading Time: 2 mins The essay on tsunami talks about various factors that contribute to the tsunami and the damage it causes to mankind. Essay on Tsunami. The disaster that is caused due to waves generated in the ocean because of the earthquake and whose main point is under the water is known as ‘Tsunami’. Also, the term tsunami is associated with tidal blogger.comted Reading Time: 2 mins Essay on Tsunami , words Essay on tsunami Tsunami is most dreadful of all-natural calamities. It means terrible sea-shore waves. Whenever Tsunami happens there is a lot of destruction at the ports and nearby areas
Essay on Tsunami for Students in English | + Words Essay
Tsunami is a set of ocean waves essay on tsunami by any large, abrupt disturbance on the sea- surface. If the disturbance is close to the coastline, local tsunamis can demolish coastal communities within minutes. A very large disturbance can cause local devastation and export tsunami destruction thousands of miles away. Tsunamis rank high on the scale of natural disasters. Since alone, essay on tsunami, tsunamis have been responsible for the loss of overlives and billions of dollars of damage to coastal structures and habitats.
Most of these casualties were caused by local tsunamis that occur about once per year somewhere in the world, essay on tsunami. For example, the December 26,tsunami killed aboutpeople close to the earthquake and about 58, essay on tsunami on distant shores. Predicting when and where the next tsunami will strike is currently impossible, essay on tsunami. Once the tsunami is generated, forecasting tsunami arrival and impact is possible through modelling and measurement technologies.
Essay 2. Meaning of Tsunami: The phenomenon we call tsunami is a series of large waves of extremely long wavelength and period usually generated by a violent, impulsive undersea disturbance or activity near the coast or in the ocean. When a sudden displacement of a large volume of water occurs, or if the sea floor is suddenly raised or dropped by an earthquake, big tsunami waves can be formed by forces of gravity. The waves travel out of the area of origin and can be extremely dangerous and damaging when they reach the shore.
The tsunami waves are completely unrelated to the essay on tsunami tides—which are caused by the extra-terrestrial, gravitational influences of the moon, sun, and the planets.
It has been internationally adopted because it covers all forms of impulsive wave generation. Essay 3. Characteristics of Tsunami : Tsunami in the deep ocean may have very long wave length of hundreds of kilometre and travels at about km per hour, but an amplitude of only about 1 km.
It remains undetected by ships in the deep sea. However, when it approaches the coast its wavelength diminishes but amplitude grows enormously, and it takes very little time to reach its essay on tsunami height, essay on tsunami.
Computer model can provide tsunami arrival, usually within minutes of the arrival essay on tsunami. Tsunamis have great erosion potential, stripping beaches of sand, essay on tsunami, coastal vegetation and dissipating its energy through the destruction of houses and coastal structures.
In the open ocean, essay on tsunami, tsunamis would not be felt by ships because the wavelength would be hundreds of miles long, with an amplitude of only a few feet. This would also make them unnoticeable from the air. As the waves approach the coast, their speed decreases and their amplitude increases. Unusual wave heights have been known to be over feet high. However, waves that are 10 to 20 feet high can be very destructive and may cause many deaths or essay on tsunami. From an initial tsunami generating source area, waves travel outward in all the directions much like the ripples caused by throwing a rock into a pond.
As these waves approach coastal areas, the time between successive wave crests varies from 5 to 90 minutes. The first wave is usually not the largest in the series of waves, nor it is the most significant.
Furthermore, one coastal community may experience no damaging waves while the other, located not that far away, may experience destructive deadly waves. Depending on a number of factors, some low-lying areas could experience severe inland inundation of water and debris of more than 1, feet. Essay 4. There is no historic record of a tsunami in the Indian Ocean: the only earlier reference to a tsunami was in relation to the Andaman Island earthquake and prior to that in s. That too is not documented.
Tsunami is most infrequent and it is almost impossible to predict as compared to a normal earthquake. Since this phenomenon has been experienced mostly in the pacific ocean region stretching from Chile in Latin America to Japan in far East-Asia. The international group for the Tsunami warning system does not extend to Indian Ocean.
The area of Sumatra where the earthquake occurred, was considered to lie in an endangered zone by many geologists and other experts, even though the exact date and time of catastrophe could essay on tsunami be forecast. The strength of the quake could not have been predicted nor its location below the ocean.
No one had thought that such a dangerous tsunami would result as it happened in December, Early warning can be made about the presence and advance of a tsunami.
But this can be practical only for those who are some distance away from ground zero. These waves could be detected by specially designed synchronous satellites mandated to keep a watch.
A more reliable method might be to locate several pressure sensors essay on tsunami the bottom of the ocean. These sensors would detect the periodic changes in pressure produced by the variations of the water column height above caused by the passing waves.
They would send the information up to the floating buoys using ultrasound chirp signal. The buoys could be equipped to communicate through satellite communication with control, analysis and operational centres, which could then issue appropriate warnings to the essay on tsunami in potential impact zones.
Although prediction of Tsunamis is an uphill task, however, disaster mitigation centres can be established in those areas, where there is an urgent need to provide relief and rehabilitation facilities. The global tsunami warning system set up in is said to predict where tsunamis will strike up to 14 hours in advance, using network of seismic centres and tidal gauges attached to buoys in the oceans. According to the scientists in the Aeronautics and Space Administration NASAa reliable early detection system for tsunamis is yet to be developed.
Essay 5. Causes of Tsunami: A tsunami is a large ocean wave that is caused by sudden motion on the ocean floor. This sudden motion could be an earthquake, a powerful volcanic eruption, or an underwater landslide. The impact of a large meteorite can also cause a tsunami.
Tsunamis travel across the open ocean at great speeds and convert into large deadly waves in the shallow water of a shoreline. Most tsunamis are caused by earthquakes generated in a subduction zone, an area essay on tsunami an oceanic plate is being forced down into the mantle by tectonic plate forces.
The friction between the subducting plate and the overriding plate is enormous. As the stuck plate continues to descend into the mantle the motion causes a slow distortion of the overriding plate.
The result is an accumulation of energy very similar to the energy stored in a compressed spring. Energy can accumulate in the overriding plate over a long period of time—decades or even centuries. Energy accumulates in the overriding plate until it exceeds the frictional forces between the two stuck plates. When this happens, the overriding plate snaps back into an unrestrained position, essay on tsunami.
This sudden motion is the cause of the tsunami—because it gives an enormous shove to the overlying water. At the same time, essay on tsunami, inland areas of the overriding plate are suddenly lowered. The moving wave begins travelling out from where the earthquake has occurred, essay on tsunami. Some of the water travels out across the ocean basin, essay on tsunami, and, at the same time, water rushes towards the land to flood the recently lowered shoreline. Essay 6. Generation of Tsunamis: Tsunamis are commonly generated by earthquakes in marine and coastal regions.
They frequently occur in the Pacific, essay on tsunami, where dense oceanic plates slide under the lighter continental plates. Because earth movements associated with large earthquakes are thousands of square kilometres in area, any vertical movement of the seafloor immediately changes the sea-surface.
The resulting tsunami propagates as a set of waves whose energy is concentrated at wavelengths corresponding to the earth movements kmwave heights determined by vertical displacement ~lm and wave directions determined by the adjacent coastline geometry.
Because each earthquake is unique, every tsunami has unique wavelengths, wave heights and directionality. From a tsunami-warning perspective, this makes the problem of forecasting tsunamis in real time daunting. By far, the most destructive tsunamis are generated from large, shallow earthquakes with an epicentre or fault line near or on the ocean floor. These usually occur in regions of the earth characterized by tectonic subduction along tectonic plate boundaries.
The high seismicity of such regions is caused by the collision essay on tsunami tectonic plates. When these plates move past each other, they cause large earthquakes, which tilt, offset, or displace large areas of the ocean floor from a few kilometres to as much as a 1, essay on tsunami, km or more, essay on tsunami. The waves can travel great distances from the source region, spreading destruction along their path. For example, essay on tsunami, the Great Chilean tsunami was generated by a magnitude 8.
Its waves were destructive not only in Chile, but also as far away as Hawaii, Japan and elsewhere in the Pacific.
It should be noted that not all earthquakes essay on tsunami tsunamis. Usually, essay on tsunami, it takes an earthquake with a Richter magnitude exceeding 7. Although relatively infrequent, violent volcanic eruptions represent impulsive disturbances, which can displace a great volume of water and generate extremely destructive tsunami waves in the immediate source area. One of the largest and most destructive tsunamis ever recorded was generated on August 26, after the explosion and collapse of the volcano of Krakatoa Krakatauin Indonesia.
This explosion essay on tsunami waves that reached feet, destroyed coastal towns and villages along the Sunda Strait in both the islands of Java and Sumatra, killing 36, people. It is also believed that the destruction of the Minoan civilization in Greece was caused in B.
Less frequently, tsunami waves can be generated from displacement of water resulting from rock falls, icefalls and sudden submarine landslides or slumps. Such events may be caused impulsively from the instability and sudden failure of submarine slopes, which are sometimes triggered by the ground motions of a strong earthquake.
Major earthquakes are suspected to cause many underwater landslides, which may contribute significantly to tsunami generation. For example, many scientists believe that the tsunami, which killed thousands of people and destroyed coastal villages along the northern coast of Papua-New Guinea, was generated by a large underwater slump of sediments, triggered by an earthquake.
In general, the energy of tsunami waves generated from landslides or rock falls is rapidly dissipated as they travel away from the source and across the ocean, or within an enclosed or semi-enclosed body of water—such as a lake or a fjord.
However, essay on tsunami, it should be noted that the largest tsunami wave ever observed anywhere in the world was caused by a rock fall in Lituya Bay, Alaska on July 9, Triggered by an earthquake along the Fairweather fault, an approximately 40 million cubic metre rock fall at the head of the bay generated a wave, which reached the incredible height of metre wave 1, feet on essay on tsunami opposite side of the inlet.
An initial huge solitary wave of about metres feet raced at about kilometres per hour mph within the bay debarking trees along its path. Can Essay on tsunami, Meteorites or Man-Made Explosions Cause Tsunamis? Fortunately, for mankind, it is indeed very rare for a meteorite or an asteroid to reach the earth. No asteroid has fallen on the earth within recorded history. This is indicated by large craters, which have been found in different parts of the earth. Also, it is possible that an asteroid may have fallen on the earth in prehistoric times—the last one some 65 million years ago during the Cretaceous period.
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, time: 3:00Short Essay On Tsunami In English • English Summary
Tsunami is a Japanese word meaning ‘harbour wave’.High sea wave occurs when a large amount of water displaced due to earthquake or volcano happening under the sea. These waves are very strong and spread throughout the places close to the sea. There are many reasons which can cause a Tsunami. It can happen because of an earthquake or blogger.comted Reading Time: 2 mins Tsunami is generated when ocean floods shift vertically, usually due to an earthquake. When a shift in the ocean floor displaces the water above, the water body travels as a huge wave to regain equilibrium. Actually tsunami is generated as a result of a sudden rise Estimated Reading Time: 4 mins Essay on Tsunami , words Essay on tsunami Tsunami is most dreadful of all-natural calamities. It means terrible sea-shore waves. Whenever Tsunami happens there is a lot of destruction at the ports and nearby areas
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