#earthquake__quake__temblor__seism  shaking and vibration at the surface of the earth resulting from underground movement along a fault plane of from volcanic activity
  supertype:  geological_phenomenon  a natural phenomenon involving the structure or composition of the earth
  subtype:  seismic_disturbance__seismicdisturbance__shock  an instance of agitation of the earth's crust
  subtype:  earth_tremor__earthtremor__tremor__microseism  a small earthquake
     subtype:  aftershock  a tremor (or one of a series of tremors) occurring after the main shock of an earthquake
     subtype:  foreshock  a tremor preceding an earthquake
  subtype:  seaquake__submarine_earthquake__submarineearthquake  an earthquake at the sea bed

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