Earthquake is a natural phenomenon. Caused by the motion of tectonic earthquake suddenly most often occur at the edges. Of the plates was the earthquake of the world, displacement thereof.Under the crust has been heat from the core. The upper crust and floating push all the time. The tectonic movement in the direction of each piece is different with the energy accumulation inside.Or separate. If the edges of the pieces of the crust any through or near to any country country. It is vulnerable to earthquake is high, such as Japan, the Philippines, Indonesia, New Zealand, etc.Are transmitted to the ground of the continental crust. On the cracks of the rock under the earth, also known as the "fault" when the plane cracked dovetail has pressure, so it would make fault moving suddenly happened.
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