Short Paragraph on Earthquakes
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.
– Paridhi Khanna