Earthquakes are caused by two main reasons why the first is due to human activities include trials bomb. The storage of water in dams And the explosion of the mines. The second cause is the primary cause of earthquakes. It is naturally occurring due to the movement of tectonic plates is the expansion of the crust using earthquake caused the crust was a crooked or bent suddenly and when it fell apart, thus releasing energy in waves. earthquake and the recovery of the object from the motion of the earthquake fault. When a fault occurs, the object will move one point apart, and it's also a tremendous release of energy in the form of seismic waves. And then return the object will return to its original shape.
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