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Question
Compare and contrast the constructive effects and the – destructive effects of an earthquake.
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Solution
Constructive effects :
- Earthquakes help the earth release its stored up energy. The majority of the earthquake occur around. The plate margins. This energy release helps to keep the earth in good shape.
- On account of both vertical and lateral displacement of the earth’s crust, earth-quakes may raise or lower parts of the earth especially near the seashore. Sagami Bay of Japan was uplifted 200 m in 1923.
- Landslides triggered by earthquakes cause the formation of lakes as has happened at many places in the Himalayan region.
Destructive effects :
- Human beings have settlements in active earthquake zones. Most often the houses and other structures collapse causing great loss of property.
- The forces of uplift and subsidence also cause submergence of coastal parts. For example Dwarka in Gujarat which now lies submerged under the sea.
- Earthquakes have changed the course of rivers in the past. They have thus rendered many areas unsuitable for irrigation and agriculture. They cause danger to human life.
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