The San Andreas Fault system is a target of great importance because of its social impact, high rates of seismicity and dense monitoring systems. Tomographic analysis along the strike slip faults of Southern California has provided spatial mappings of fault asperities and their control on seismicity at a variety of locations along the fault. I was the first to associate high velocity and dynamic rupture at San Andreas asperities in regions where large main-shock events occurred. These patterns can be used to estimate future sites of rupture along the fault.
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Lees, J.M. and Nicholson, C., (1993). Three-dimensional tomography of the 1992 Southern California sequence: Constraints on dynamic earthquake ruptures? Geology, 21(5): 385-480.