essay on tsunamis

A tsunami is a series of travelling ocean waves which are set off by geological disturbances near the floor of the ocean. The waves rush across the ocean and increase their momentum over a stretch of thousands of kilometres.Some tsunamis may appear as a tide but they are not tidal waves in reality. While tides are caused by gravitational influences of the moon, sun and the planets, tsunamis are seismic sea waves.That is, they are related to an earthquake-related mechanism of generation. Tsunamis are usually a result of earthquakes, but may be at times caused by landslides or volcanic eruption or, very rarely, a large meteorite impact on the ocean.The tsunami can be understood at the basic level by looking at the series of concentric ripples formed in a lake when a stone is thrown into it. A tsunami is like those ripples but caused by a disturbance much greater in magnitude.About Tsunamis: Tsunamis are a series of waves of very, very long wavelengths and period created in oceans by an impulsive disturbance. Tsunamis are shallow- water waves different from the wind-generated waves which usually have a period of five to twenty seconds which refers to the time between two successional waves of about 100 to 200 metres.Tsunamis behave as shallow-water waves because of their long wavelengths. They have a period in the range of ten minutes to two hours and a wavelength exceeding 500 km. The rate of energy loss of a wave is inversely related to its wavelength.So tsunamis lose little energy as they propagate as they have a very large wavelength. So they will travel at high speeds in deep waters and travel great distances as well losing little energy. A tsunami that occurs 1000 metres deep in water has a speed of 356 km per hour.At 6000 m, it travels at 873 km per hour. It travels at different speeds in water: it travels slow in water that is shallow and fast in deep water. As.
This student essay consists of approximately 2 pages of analysis of The Tsunami Disaster. This section contains 300 words (approx. 1 page at 300 words per page) The Tsunami Disaster Summary: The economic, health, and educational impact of the 2004 Indian Ocean tsunami. THE TSUNAMI DISASTER. Impact of the tsunami. Destruction on the human mankind. Economy A lot of building, house damage, boats and other vehicles destroy. People homeless and they have to live in other place. The government have to spend a lot of money to rebuild the damage area that cause by the tsunami. The victims of the disaster also lost their belongings and job (e.g. fishermen) and at the same time it also affected the economy that based on the aquaculture. The tourism sector also will be affected because most of the people will think twice to go to the effected area such as Phuket, Thailand and this can influence the economy development because some of the country depends on the tourism sector to stabilise their economy. Health The PBB scientist alert that the epidemic disease will occur and spreads to the unaffected area. Starvation due to the lack of food and medicine causing malnutrition. Some of the medicine cannot reach certain area because of the lost connection. Many of the death body are not well manageable because they are many dead bodies. Because of that, this dead body contaminated the air and water. This can caused disease such cholera and malaria. The hospital facilities also destroyed and it will make the situation become worse. Education. Most of the students cannot attend to their school because their school was affected by the tsunami tragedy. They had lost their school so how they want to continue their studies in this short period of time? Most of the students will be left behind in their studies because they had to delay their studies until their schools are completely.
Enter Your Search Terms to Get Started! The Causes of Tsunami As the earth begins to tremble many fear the troubles ahead. Waves are suddenly being formed and the people of the west coast are immediately alerted. What could this be? This is a tsunami, an earthquake that is formed underwater. The sea floor abruptly deforms and displaces the overlying water from its equilibrium position. Waves are formed when the displaced water mass, acting under the influence of gravity, attempts to regain its equilibrium. The main factor that determines the initial size of a tsunami is the amount of vertical sea floor deformation. A tsunami can also be generating from submarine landslides. During a submarine landslide, the equilibrium sea level is altered by sediment moving along the sea floor. The aftermath of this horrendous storm is shocking. The causes of tsunamis derive from earthquakes, landslides, or volcanic eruptions, which can cause a high death and/or injury rate. A tsunami that is caused by an undersea earthquake is also called a seismic sea wave. Scientists can calculate where and when a given undersea earthquake occurred and predict when the resulting seismic sea wave will reach shore. The scientists base their calculations on data provided by instruments called seismographs. These instruments detect vibrations called seismic waves that the earthquake sends through the rock beneath the ground (Phillip). An earthquake on land differs greatly than one underwater. The fact that there is water involved makes the situation even more tedious to handle. To detect an earthquake underwater is sometime impossible, the wave may come without any warning the wave may cause more death and damage than ground shaking. In addition to earthquakes similar ground shaker plays a key part in the causes of tsunamis. Landslides are a descent of mass of earth and rock down a mountain slope.