Earthquakes

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Earthquakes occur in the narrow bands which match the outlines of the earth tectonic plates. 

Earthquakes are caused by a sudden movement in the earth crust. Most take place at plate boundries. Earthquakes happen when two or more tectonic plates lock together due to friction. The forces moving the plates continue to apply pressure on the plates. This builds up until enventually the plates move whithout warning the crust might split open. 

The richetr scale runs from 1 to 10 and measures the amount of energy relaeased by an earthquake. 

The Mercalli scale runs from 0 to 12 and tells how…

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