The constant movements have even led to the formation of mountains and valleys. When these plates move against each other, there is a point where they interact. In geological terminology, this meeting point is known as a fault line. This fault line is sometimes known as a fracture in the earth’s crust. The moment the plates begin to move, the potential energy, commonly known as stored energy, is released from the meeting point, known as the hypocenter. The outcome is an earthquake.