Disaster Management: Earthquakes
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Earthquakes occur due to sudden movements of earth’’s crust. It causes the violent, short-term vibrations in the earth. The point at which the first movement occurs during an earthquake is cal... led the epicenter. The severity of an earthquake is generally measured by its magnitude on Richter Scale The largest earthquake ever recorded occurred on May 22, 1960 in Chile with the estimated magnitude of 9.5 on Richter Scale, affecting 90,000 square miles and killing 6,000 people. The devastating earthquake of intensity 7.7 on Richter scale which hit Bhuj Town in Gujarat had caused massive damage, killing 20,000-30,000 people and leaving many injured. It had an energy equivalent to a 5.3 megaton hydrogen Anthropogenic activities can also cause or enhance the frequency of earthquakes. (a)Impoundment of huge quantities of water in the lake behind a big dam. (b) Under ground nuclear testing. (c) Deep well disposal of liquid waste [Show More]
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ECOLOGY, ENVIRONMENT AND DISASTER MANAGEMENT
ECOLOGY, ENVIRONMENT AND DISASTER MANAGEMENT
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