How to reinforce and strengthen the buildings in world cities located within earthquake zones?

Structural engineers and materials scientists are doing a pretty good job today. Traditionally, buildings were built as rigid as possible, but this caused the structures to concentrate siesmic loads in small areas and to fracture and fail in a siesmic event. Buildings are now designed with a slightly flexible or elastic structure. This design feature allows the enormous forces that transmit from the displacement of the earth to the relatively small foundations in high rise buildings, to be dissipated by allowing the motion to be distributed into all parts of the structure.