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Sigma KEE - EarthTremor
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地震
An EarthTremor is an individual seismic event in which the earth shakes due to release of seismic pressures.
Relationships      
Parents 地质过程 The class of activities that are caused by geological forces and affect geological features, and which may affect the biosphere as well.
  Motion that involves rapidly Rotating between two positions.
Children 余震Aftershock is the subclass of EarthTremors that occur after the main tremor(s) of an Earthquake.


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