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2015-11-23T20:16:15+05:30

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Earthquakes are caused when a rock underground suddenly breaks along a fault
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2015-11-23T20:36:47+05:30
When lithospheric plates moves at an irregular speed they often hit each other this results in earthquakes. Also sometimes bomb explosions or volcanic eruptions can make the surface of the earth shake this shaking of earth is often considered as an earthquake.  It is measured on the richer scale.
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