Generally, faults generate earthquakes by their large gaps.
Take for instance, San Andreas Fault in the state of California. If you ever watched the first movie of "Superman" it will give you an idea on how earthquakes form.
As large rocks are misplaced due to volcanic forces inside the Earth, the fault causes a "domino effect" on nearby rocks, thus, it rocks other nearby stones. But the longer the distance of the rocks from the main source of earthquake or the epicenter, the lower the possibility the other rocks will be misplaced.
Although earthquakes are more possible by forthcoming volcanic activity, misplacement of large rocks, or boulders, is also possible, but in a minimal possibility.