Question

explain in brief the cause of an earthquake

Answer 1

An earthquake (or quakes, tremors) is the shaking of the surface of the Earth. They are caused by sudden movements of the Earth's tectonic plates. ... Earthquakes are usually quite brief, but may repeat. The sudden release of tension in the tectonic plates sends waves of energy that travel through the Earth.

Answer 2

The earthquake is caused by the sudden displacement of tectonic plates