What is an earthquake? What causes an earthquake? Explain
An earthquake is a sudden shaking or trembling of the earth. It lasts for a very short time. It is caused by a disturbance deep inside the earth’s crust. We know that tremors are caused by the disturbance deep down inside the uppermost layer of the earth called crust . The outermost layer of the earth is fragmented. Each fragment is called a plate . These plates are in continual motion. When they brush one another, or a plate goes under another due to collision , they cause disturbance in the earth’s crust. It is this disturbance that shows up as an earthquake on the surface of the earth
