A fault in which the dominant displacement is horizontal and parallel to the trendor strike of the faultsurface is called a strike-slip fault(Figure 10.14A). The earliest scientific records of strike-slipfaulting were made following surface ruptures that produced large earthquakes. One of the most noteworthy of these was the great San Francisco earthquake of 1906. During this strong earthquake, structures such as fences that were built across the San Andreas Fault were displaced as much as 4.7 meters (15 feet). Because movement along the San Andreas causes the crustal block on the opposite side ofthe fault to move to the right as you face the fault, it is called a right lateral strike-slip fault.