Question

causes of earthquake

Answer 1

Causes of Earthquake :
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The uppermost layer of the earth is made up of block of rocks. These blocks float on a layer of semi- liquid rock called Mantle.

Earthquake occurs when the blocks of rocks touch or move against each other in the semi- liquid layer.

This causes a sudden slipping of the position of the earths crust or tectonic plates relative to each other. This movement causes vibrations, Volcanic activity as explosive eruption, caused by gas explosion. Any sudden vibration or movement of a part of the Earth's crust caused by natural or man made forces resulting in the shaking or trembling is called Earthquake..

Following are the main causes of Earthquake :

1. Volcanic Eruption

2. Folding and Falling

3. Plate Tectonics

4. Man- Made explosions.

5. Dislocation of the crust.

Epicentre is the place on the surface of the earth, directly abvove the focus. The intensity of the earthquake is the greatest​ at the epicentre.

Aftershock is a small earthquake that often follows a big one. After the main shock , the rocks have jumped too far and are still unstable . Aftershock are felt as the rocks settle into a more stable position.

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BEST OF LUCK ;-)

#akashmandal.

Answer 2

Answer:

The main causes of Earthquake are:-

• Volcanic eruption

• Man- made explosion

• Dislocations (or faults ) of the crust

• Movement of the tectonic plates

Hopes it will help u :)