Question

what is mean by earthquake ?​

Answer 1

earthquake :

sudden vibrations on the earth and shaking of the earth surface is called earthquake .

Answer 2

Answer:

The short answer is that earthquakes are caused by faulting, a sudden lateral or vertical movement of rock along a rupture (break) surface. ... An earthquake is the shaking that radiates out from the breaking rock. People have known about earthquakes for thousands of years, of course, but they didn't know what caused them.

Explanation:

An earthquake is caused by a sudden slip on a fault. The tectonic plates are always slowly moving, but they get stuck at their edges due to friction.