Question

Discuss the causes of earthquake

Answer 1

HEY .

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The causes of earthquake are :-

1.) Tectonic Movements: The disturbances inside the earth are called tectonic movements. These forces bring about changes on the earth surface and physical features like mountains, plateaus and rift valleys are formed. Most disastrous earthquakes are caused by tectonic forces. Tectonic forces create tension and pressure and the stress begins to build up inside the earth. When the stress tends to be more than what the rocks of the earth can bear, the rocks are broken and displaced from their state of equilibrium. It is known as faulting.

2.) Volcanic Eruptions: The volcanic eruptions are often very violent and cause vibrations in the earth crust. Sometimes the vent of a volcano is blocked temporarily and explosive eruption takes place suddenly causing tremors in the earth crust. The Krakatoa that erupted in 1883 became the cause of a violent earthquake there.

3.) Other Reasons: The roofs of underground caves sometimes give way and release great force to cause minor tremors in the earth crust. Nuclear explosions also release massive energy to cause tremors in the earth crust.

HOPE , IT HELPS.