FIGURE 5.10. -Seismicity along the southern section of the San Andreas fault system. A, Earthquake locations, showing major branches of the San Andreas fault system in red; faults dotted where concealed. Magnitude symbols shown in explanation are scaled with enlargement of cross sections. BZ, Brawley seismic zone; LB, Long Beach; MSJ, Mount San Jacinto; SB, Santa Barbara, SBd, San Bernardino. B, Depth sections outlined in 5.10A. Faults: CU, Cucamonga; NI, Newport-Inglewood; W, Whittier.