题目内容
The elastic rebound theory was proposed to explain why earthquakes occur based on the observations of the earthquake on the San Andreas Fault that devastated San Francisco in 1906.
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An earthquake is a shaking or vibration of the ground, it usually occurs when rocks being defromed suddenly break along a fault.
When stress is applied, rocks first respond by deforming elastically.
Most mountain building occurs in tensional environments.
In a normal fault, the hanging wall moves downward relative to the footwall.
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