GEOLOGY

EARTH SCIENCE

EARTHQUAKES

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The snapping back of deformed rock to its previous shape.
A
elastic rebound
B
plastic rebound
C
rebound motion
D
divergent boundary
Explanation: 

Detailed explanation-1: -The snapping back of the rock returning to its original shape causes the rock to vibrate, and this is what causes the shaking during an earthquake. The snapping back is called elastic rebound.

Detailed explanation-2: -Elastic rebound is what happens to the crustal material on either side of a fault during an earthquake. The idea is that a fault is stuck until the strain accumulated in the rock on either side of the fault has overcome the friction making it stick.

Detailed explanation-3: -How are elastic rebound and elastic deformation different? Elastic deformation causes objects to bend, whereas rebound causes objects to return to their original shape.

Detailed explanation-4: -Origin of Earthquakes The elastic rebound theory suggests that if slippage along a fault is hindered such that elastic strain energy builds up in the deforming rocks on either side of the fault, when the slippage does occur, the energy released causes an earthquake.

Detailed explanation-5: -Like the return of the broken rubber-band pieces to their unstretched shape, elastic rebound is the sudden return of elas-tically deformed rock to its original shape. Elastic rebound occurs when more stress is applied to rock than the rock can.

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