The earthquake is second nature. Caused by a sudden movement of the crust The majority of earthquakes often occur at the edges of the plate tectonics is the catastrophe of the world. Such movement occurs because molten rock layers under the crust. Heat energy received from the floating world, and axis, push the crust all the time. Make each piece of crust are moving in a different direction with the energy accumulated inside the edge of crust is the best collision friction coating or separately.
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