English, asked by student9779, 1 year ago

Write an Essay on Earthquake – A Natural Calamity

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Answered by arpit281
5
Sample Essay on Earthquake – A Natural Calamity. India has been blessed by nature and that is for the entire world to envy, be it mineral resources, be it huge forests or densely wooded hills and huge cascading waterfalls joining together to form mighty rivers. We have got a huge coastline too both to the east and the west most of the rivers finding their outlets in the seas.

It is nature in all its bountiful resources, the unfathomable power just waiting to be tapped fruitfully. Also nature in all its awesome glory, beautiful, mindboggling and favorable.

But for all these blessings there are negative sides too, some due to over-exploitation, some due to nature’s wrath and it would not be wrong to say that there is nothing more destructive than when nature is furious or making adjustments.

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There is a long history of devastating earthquakes in our country and all over the world and they have been taking place with monotonous regularity.

The crust of over planet is built up of several solid rock faces which are not static. They are moving slowly even by millimeters, with thickness of plates and depths ranging from 30 to 80 kilometers below the surface. These huge moving plates have diversions separating them from other plates and are termed boundaries.

Earthquakes take place when these slowly moving plates clash with each other and are forced to rise or even when the individual fault lines in plates are in assertions causing interpolate quakes.

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The quakes are caused by the release of elastic energy during these fault assertions or plate movements and are released in the form of seismic waves or shock waves travelling outwards in all directions. The epicenter is the point above the quake centre and is the place where maximum destruction occurs.

The earth’s crust is built up of such innumerable plates called tectonic plates and the effect of the quake, as mentioned earlier, is for some assertive fault in one plate or the effect of impact of two separate plates. This does not mean that there is any succession of related impacts continuously due to the impact on the previous one.

The massiveness of the 1819 Kutch Earthquake which had registered 8 on the Richeter Scale can be imagined from the fact that about 5000 square kilometers of area had become depressed by nearly 15 feet and 1500 square kilometers had been raised by nearly 50 feet in what is named as Allabund.

Unfortunately, even after so much progress has been made in understanding geological configuration, we still cannot predict reliably the intensity, place or occurrence of an earthquake. However studies are being made based on the speed at which shock waves travel through the ground, changes in levels of surface of the ground which rises when the pressure below the ground increases emission of an inert radioactive gas ‘Radon’ and changes in electro-magnetic behavior of rocks.

Answered by divyagupta2
7
hii dear ....

[ESSAY ON EARTHQUAKE]

We know that various forces of nature are responsible for changes in the crust of the earth. Earthquake is a movement of tremor of the earth’s crust. It originates naturally and below the surface. It sometimes causes a permanent change of level at the surface of the earth.

The place of origin of an earthquake below the earth’s surface is called the centre. The point on the surface vertically above it is known as the epicentre. The intensity of tremor is at the maximum near this epicentre.

It is known from Seismograph that the vibrations spread in all directions from the point of origin of an earthquake. These vibrations can be compared with the series of concentric waves of water generated by a stone when thrown into a still pond.



The material of the interior of the earth gradually contract due to loss of heat by radiation. As a result of this, some tectonic forces (tensional and compressional forces) are produced which shake the surface. These forces are mainly responsible for the formation of Fold Mountains and rift valleys. That is why, the earthquakes occur more frequently in the regions of Fold Mountain.

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