Question

What is an earthquake.
Why earthquake comes any times

Answer 1

Answer: A earthquake is the ground shaking caused by a sudden slip on a fault. Stresses in the earth's outer layer push the sides of the fault together. Stress builds up and the rocks slip suddenly, releasing energy in waves that travel through the earth's crust and cause the shaking that we feel during an earthquake.

Explanation: Earthquakes are caused when rock underground suddenly breaks along a fault. This sudden release of energy causes the seismic waves that make the ground shake. When two blocks of rock or two plates are rubbing against each other, they stick a little.

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Answer 2

Answer:

An Earthquake is defined as a tremor below the surface of the earth which causes shaking of the crust. These devastating tremors are caused by the stresses that braek the earth's crust.

No method is still foolproof as has been proved by recent earthquakes in Japan, India and USA.