Question

essay on earth quake and tsunami

Answer 1

Hi.........

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atural disasters happen all over the world, and they can be utterly devastating for people’s lives and the environments in which they live. Although natural disasters are caused by nature and there is nothing that we can do to prevent them happening, there are many different natural causes that lead to natural disasters, and being aware of these causes enables us to be better prepared when such disasters do arrive.

One common natural disaster is flooding, which occurs when a river bursts its banks and the water spills out onto the floodplain. This is far more likely to happen when there is a great deal of heavy rain, so during very wet periods, flood warnings are often put in place. There are other risk factors for flooding too: steep-sided channels cause fast surface run-off, while a lack of vegetation or woodland to both break the flow of water and drink the water means that there is little to slow the floodwater down. Drainage basins of impermeable rock also cause the water to run faster over the surface.

Earthquakes are another common natural disaster that can cause many fatalities. The movements of the plates in the earth’s crust cause them. These plates do not always move smoothly and can get stuck, causing a build-up of pressure. It is when this pressure is released that an earthquake occurs. In turn, an earthquake under the water can also cause a tsunami, as the quake causes great waves by pushing large volumes of water to the surface.

Tsunamis can also be caused by underwater volcanic eruptions. Volcanic eruptions are another natural disaster, and they are caused by magma escaping from inside the earth. An explosion takes place, releasing the magma from a confined space, which is why there are often also huge quantities of gas and dust released during a volcanic eruption. The magma travels up the inside of the volcano, and pours out over the surrounding area as lava.

One of the most common natural disasters, but also one of the most commonly forgotten, is wildfires. These take place in many different countries all over the world, particularly during the summer months, and can be caused by a range of different things. Some of the things that can start the wildfires can be totally natural, while others can be manmade, but the speed at which they spread is entirely down to nature. The two natural causes of wildfires are the sun’s heat and lightning strikes, while they can also be caused by campfires, smoking, fireworks and many other things. The reasons that they spread so quickly are prolonged hot, dry weather, where the vegetation dries out, which is why they often take place in woodland.

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Answer 2

Earthquake Essay 2 (200 words)

Earthquake is one of the dangerous and life threatening natural disaster which can come anytime and anywhere on the earth. Most of the earthquakes come with minor tremors however larger earthquakes with strong tremors generally begins with slight tremors but soon gets changed into more violent shocks. Stronger earthquakes generally end up with huge and forced vibrations at long distance from the main point of arousal. It gradually diminishes with reduced aftershocks. The focus of earthquakes becomes the subterranean point where it originates. Magnitude and intensity of the earthquake can be measured with the help of variety of scales such as Richter scale, moment magnitude scale, modified Mercalli scale, etc.

Earthquake is a life threatening event that responsible for the huge damage to the living and non-living beings. Earlier, it was quite hard to imagine the intensity of the earthquake before its occurrence. However, now-a-days, it has become easy to estimate the magnitude and intensity of earthquake because of the instrumental advancement in the world. People, in the ancient time, believed that earthquake occurs as mother earth was angry with them. It was Aristotle (a great Greek philosopher) who relate the occurrence of earthquake to some physical factors. According to him, the compression of air within the arch escapes cause shakes of some part of the earth surface and called as volcanic activity.


Tsunamis

             All around the world natural disasters such as earthquakes, volcanoes, tornadoes, and hurricanes, are waiting to strike like a time bomb waiting to explode. Once unleashed, these natural disasters could become deadly. One of nature's tremendous natural disasters is the great waves of the mighty ocean. In the past people referred to them as 'tidal waves' a name that is misleading because these great waves are not related to the tides in any way. The Japanese, who have felt the waves destructive power for many generations, gave them the name Tsunami pronounced 'soo-nah'mee'. "The word Tsunami means 'harbor wave' which references the giant waves' ability to penetrate the protected harbors along Japan's coast" (Koenig, Science). Although these natural disasters are not as common as others, people need to be aware that Tsunamis can be very devastating and destructive, more so than tornados or other storms. People need to educate themselves on how tsunamis are formed, the destruction they can cause, and the warning and support centers that have been established before the clock runs out and it's too late.
             Before one can truly understand the devastation and destruction these natural disasters can cause, one must first understand what causes tsunamis and how they are formed. There are many causes of tsunamis such as landslides, volcanoes, eruptions, and explosions, but the most common cause are earthquakes. "The relationship between earthquakes and tsunamis has been known for more than 2,000 years – ever since the Greek historian Thucydides connected an Aegean Tsunami in 426 B.C. to the quake that preceded it" (Koenig, Science). However, in order for a disturbance to generate a tsunami, the disturbance must occur underneath or near the ocean, be extremely large, and cause movement in the seafloor. When earthquakes occur a plate usually plunges dow..