Our planet is a very restless place. Every 30 seconds, the ground suddenly rumbles and trembles. Most of the movements are so slight that they are not felt. Others can be so large they cause complete disaster. Big cracks appear in the land, streets buckle and buildings simply crumble. In fact whole towns and cities can be destroyed. These are called earthquakes and the reason they occur is because the Earth’s crust is made up of moving parts called plates. When these plates slide past or into each other, the rocks jolt and send our shock waves.
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Fact File: Both mining and tunneling operations are known to have caused earthquakes in areas that are already under tension due to movements in the Earth’s crust. |
Picture Credit : Google