Why All The Earthquakes?

Jesus told us 2000+ years ago that as the times grew closer to His return than these things would happen.... "Then said he unto them, Nation shall rise against nation, and kingdom against kingdom: And great earthquakes shall be in divers places, and famines, and pestilences; and fearful sights and great signs shall there be from heaven. But before all these, they shall lay their hands on you, and persecute you, delivering you up to the synagogues, and into prisons, being brought before kings and rulers for my name's sake." Luke 21 verse 10-12 (King James Bible)