earthquake

1. Shaking and vibration at the surface of the earth resulting from underground movement along a fault plane or from volcanic activity (synset 107443554)
   is a type of: geological phenomenon - a natural phenomenon involving the structure or composition of the earth
   subtypes:

   • seismic disturbance, shock - an instance of agitation of the earth's crust
   • earth tremor, microseism, tremor - a small earthquake
   • seaquake, submarine earthquake - an earthquake at the sea bed
   same as: quake, seism, temblor
2. A disturbance that is extremely disruptive (synset 114001317)
   "selling the company caused an earthquake among the employees"
   is a type of: commotion, disruption, disturbance, flutter, hoo-ha, hoo-hah, hurly burly, kerfuffle, to-do - a disorderly outburst or tumult

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