GEOLOGY

Detailed explanation-1: -This gradual accumulation and release of stress and strain is now referred to as the “elastic rebound theory” of earthquakes. Most earthquakes are the result of the sudden elastic rebound of previously stored energy.

Detailed explanation-2: -elastic deformation: For small differential stresses, less than the yield strength, rock deforms like a spring. It changes shape by a very small amount in response to the stress, but the deformation is not permanent. If the stress could be reversed the rock would return to its original shape.

Detailed explanation-3: -The elastic rebound theory is an explanation for how energy is spread during earthquakes. As rocks on oppo-site sides of a fault are subjected to force and shift, they accumulate energy and slowly deform until their inter-nal strength is exceeded.

Detailed explanation-4: -Earthquakes, or seismic activity, are caused by sudden brittle deformation accompanied by elastic rebound. The release of energy from an earthquake focus is generated as seismic waves. P and S waves travel through the Earth’s interior.