Answers

2015-05-01T11:18:39+05:30
when seismic waves are created due to any sudden and huge release of energy in the crust of the earth , an earthquake occurs.the frequency and duration of the earthquake is dependent on the seismic waves.
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2015-05-01T11:29:16+05:30
When two blocks of rock or two plates are rubbing against each other
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