Tell them there are different kinds of faults (strike-slip, normal, and reverse faults ... based on the relative movement of one side of the fault with respect to the other.

Normal faults occur when the crust is stretched and ... Strike-slip faults involve horizontal movement, with little to no vertical displacement. In these faults, the blocks of rock slide past ...

LOGAN - Research underway at Utah State University has revealed significant clues about the Wasatch Fault’s earthquake risk.