Earthquakes occur most often along geologic faults, narrow zones where rock masses move in relation to one another. About latest earthquakes version info clicking the list icon in the top right corner will load the earthquake list. Is the shaking of the surface of the earth, resulting from the sudden release of energy in the earth. S lithosphere that creates seismic can range in size from those that are so weak that they cannot be felt to those violent enough to toss people around and destroy whole cities. Earthquake, any sudden shaking of the ground caused by the passage of seismic waves through earth.