Answers

2016-07-21T17:32:15+08:00
It is the energy radiates in all directions from the focus in the form of waves, which are recorded in seismographs.
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2016-07-21T21:53:41+08:00
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a wave of energy that is generated by an earthquake or other earth vibration and that travels within the earth or along its surface. British Dictionary definitions for seismic wave Expand.