Question

Is there any relation between dam and earthquake? Explain
​

Answer 1

$\huge{\mathcal{\purple{A}\green{N}\pink{S}\blue{W}\purple{E}\green{R}\pink{!}}}$

Dams by itself do not cause any earthquake. The purpose of any dam is to impound the flowing water.

This leads to formation of reservoir in which a large portion of land is submerged along with the river course on which the dam is made.

  This leads to increase in the pore-water-pressure of that area. 

If ther happens to be any known fault plane in the reservoir area, this sudden increase in pore-water-pressure may lead to increase seepage in the subsurface and eventual low of water along the fault-plane.

In this worst-cenario this may lead to triggerring a slip on that fault plane due to lubricant action of water-flow. This is called reservoir-induced earthquake. 

so, from the above information we can conclude that there is a relation between dams and earthquake!

Answer 2

Answer:

According to scientists dams are triggered by earthquakes. Extra water pressure create microcracks and fissures in the ground and near reservoirs.

Explanation: the epicenter of tremors and numerous fore -- and aftershocks were all either in the koyna dam or near reservoir.