The San Gorgonio Pass is one of the largest irregularities of the San Andreas Fault system , where it branches into a group of discontinuous faults . The convoluted nature of the fault strands makes estimating the source characteristics of future events in that area challenging . Simultaneous rupture of multiple fault strands can produce exceptionally complex earthquakes , like the 1992 Landers earthquake , which was the result of sequential rupture of multiple strike-slip faults
1992 Landers earthquake
1992 Landers earthquake
1948 Desert Hot Springs earthquake