Earthquakes occur most often along geologic faults, narrow zones where rock masses move in relation to one another. Is the shaking of the surface of the can be extremely violent or so slight that they only register on instruments. Various interconnected people struggle to survive when an earthquake of unimaginable magnitude hits los angeles, california. About latest earthquakes version info clicking the list icon in the top right corner will load the earthquake list. 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.