The main reason for the occurrence of earthquake is the collision of plates inside the earth. There are seven plates inside the earth which keep on rotating continuously. When these plates collide with each other at some place, a fault line zone is formed there and the corners of the surface fold. Due to the cornering of the surface, pressure builds up there and the plates start breaking. Due to the breaking of these plates, the energy inside finds a way to come out, due to which the earth shakes and we consider it as an earthquake. ,