seismic disturbance, shock - an instance of agitation of the earth's crust; "the first shock of the earthquake came shortly after noon while workers were at lunch"

earth tremor, microseism, tremor - a small earthquake

seaquake, submarine earthquake - an earthquake at the sea bed

geological phenomenon - a natural phenomenon involving the structure or composition of the earth

tremble - move or jerk quickly and involuntarily up and down or sideways; "His hands were trembling when he signed the document"

shake, agitate - move or cause to move back and forth; "The chemist shook the flask vigorously"; "My hands were shaking"