In the light of the elastic rebound theory, it has been discovered tnat release of strain could be made by injecting fluid to lubricate fault planes. Instead of letting strain build up to be released subsequently in a major destructive earthquake, it may be possible by fluid injection to reduce the frictional resistance to faulting.
With the fluid reducing the friction, strain can be released in a number of smaller and timed shocks. In such cases, the injected fluid does not cause the quake but it allows a quake that would occur sometime anyway to be controlled.
Since the damage caused by an earthquake depends on the rate of vibration of the quake, the construction should be made accordingly.
It has been seen that if the structure is made quite firm, the shocks may not be able to cause much damage to it and the structure can withstand the vibrations. In such buildings the roofs are made as light as possible. However, in regions where earthquakes are frequent, the structures should be made of lighter materials.
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