Why do earthquake occurs ?
Answers
Answer:
Earthquakes are usually 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. ... When the rocks break, the earthquake occurs.
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An earthquake is caused by a sudden slip on a fault. The tectonic plates are always slowly moving, but they get stuck at their edges due to friction. When the stress on the edge overcomes the friction, there is an earthquake that releases energy in waves that travel through the earth's crust and cause the shaking that we feel.
Explanation:
Earthquakes are caused by tectonic movements in the Earth's crust. The main cause is that when tectonic plates collide, one rides over the other, causing orogeny (mountain building), earthquakes and volcanoes.
The boundaries between moving plates form the largest fault surfaces on Earth. When they stick, relative motion between the plates leads to increasing stress. This continues until the stress rises and breaks, suddenly allowing sliding over the locked portion of the fault, releasing the stored energy as shock waves.
The earthquakes are caused by the vibrations set up in the earth's crust which spread outwards in all directions from the source of disturbance.
On the basis of such disturbances produced in the solid body of the earth, many causes have been assigned for causing earthquakes, minor as well as major.
Some of the earthquakes are artificial, while others are natural. But it is undoubtedly true that all the earthquakes are caused due to the disequilibrium in the earth's crust.
Causes of the earthquakes fall into the following broad categories:
- 1. Volcanic activities
- 2. Folding and faulting
- 3. Plate tectonics
- 4. Human interference with nature (anthropogenic factors)