Consider the following statements about earthquake-

1. The point where the energy is released is called the focus of an earthquake, alternatively, it is called the epicenter.

2. The point on the surface, nearest to the focus, is called the hypocentre.

3. All-natural earthquakes take place in the lithosphere.

4. The most common ones are tectonic earthquakes. These are generated due to the sliding of rocks along a fault plane.

Which of the statements given above is/are not correct?