Very Short paragraph on Earthquake

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When the earth’s crust suddenly vibrates or shakes, this phenomenon is called an earthquake. The earthquakes are caused by the internal disturbances of the earth’s surface. Volcanic eruptions also cause earthquakes, earthquake vibration may be mild or strong The point within the earth’s crust where the disturbance in an earthquake starts is called Its focus. The point on the earth’s surface which is directly above the focus is called the epicenter.

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