the word earthquake means the place where we live and the quake means the cracks in it commonly it is known as earthquake                                                                                                                                            the question arises why the earthquake become for this problem many scientist has research and they says that the earth quake is is due to the unbalance of the earth because for many years ago there would be lot of mountain and number of forest in this world on the earth                                                                                                                                                                             
as at that time our population was less so as the population increases we are using mountains and forest for our useful purpose we cut these thing and make different thing from it thus these thing create unbalance on the earth and thus earth quake take place