Write a short paragraph on evolution of earthquake
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Any sudden movement of the earth due to a natural cause which produces a shaking is known as an earthquake. The chief cause of earthquakes is the sudden slipping of the portion of the earth’s crust past each other along fractures of faults. Another cause is volcano activity.
Minor causes of earthquake are sudden landslides, sub-marine slides and collapse of cavern roofs. The sudden shock sets up vibration in the earth and the vibrations take the form of waves within the earth. The focus of the earthquake is the place where these vibrations originate and the point on the earth’s surface which is vertically above the focus is called the epicenter. If the focus is nearer the earth’s surface the effects of the earthquake is greater. The vibrations or the tremors of the earthquake are measured by the Richter scale.
Earthquakes cause change in the earth’s surface. Sometimes in mountainous regions landslides are caused. Buildings collapse and several people are rendered homeless. Fire is another great danger. Railway lines are often bucked of twisted. Under-ground water system is naturally disturbed by earthquake.
It is a natural calamity and its effects are disastrous.
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What is a earthquake ?
Earthquakes or earthquakes are natural disasters that manifest themselves by shaking the earth or even lifting the oceans.
They are of different intensity and it is thanks to the Richter scale that we can
measure their magnitude which oscillates between 3,5 and 8.
As the earthquake can not be felt, so much this one can cause considerable
damage to the buildings but also the inhabitants and over a large area.
Write a short paragraph on evolution of earthquake
The number of earthquakes varies each year from 500,000 to 1 million or more than 2,700 earthquakes per day (meter).
They were felt in 30,458 different places in 2005.
Each year, 100,000 earthquakes are felt and 1,000 are able to cause damage.
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