To be agitated with quick, short motions continually repeated; to shake with fear, cold, etc.; to shudder; to tremble.

To shake, vibrate, or quiver, either from not being solid, as soft, wet land, or from violent convulsion of any kind; as, the earth quakes; the mountains quake.

A tremulous agitation; a quick vibratory movement; a shudder; a quivering.

shaking and vibration at the surface of the earth resulting from underground movement along a fault plane of from volcanic activity

shake with fast, tremulous movements; "His nostrils palpitated"

shake with seismic vibrations; "The earth was quaking"

a trembling or shaking of the earth produced by sudden breaking of rocks either by natural or man-made causes. This may be volcanic or tectonic in origin.

A quake is the result when the surface of a planet, moon or star begins to "shake" having a noticeable feel.