[1] It is a part of the San Andreas Fault system and it is located in the western Salton Trough spanning three counties: Imperial, Riverside, and San Diego county, California.
[3] The San Felipe Fault zone is estimated to have originated 1.1-1.3 Ma.
[3] Both the San Jacinto Fault zone and San Felipe fault zones reorganized in the middle to late Pleistocene era and accumulated 600 meters of sediment during uplift and folding.
[4] These 600 meters of sediment make up the Sunset strand of the San Felipe Fault zone.
[1] The current deformation (started 0.5-0.6 Ma) is the shortening of the fault, which inverts and exhumes sediment accumulation.