Largest discontinuity along the San Andreas fault San Andreas fault slip decreases to a minimum of 5–10 mm/yr at the SGP, from 24 ± 3.5 mm/yr at Cajon.

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Presentation transcript:

Largest discontinuity along the San Andreas fault San Andreas fault slip decreases to a minimum of 5–10 mm/yr at the SGP, from 24 ± 3.5 mm/yr at Cajon Pass on the northwest and 12–22 mm/yr at Indio on the southeast The San Andreas fault curves abruptly southward from its normal southeast trend and butts into the eastward- trending Banning fault at 45

Traces of active faults are show in red Inactive faults are shown in black Beach-balls show epicenter and oblique slip during earthquakes on the north- dipping San Gorgonio Pass– Garnet Hill fault system at depth Stars show epicenter of earthquakes on faults outside of San Gorgonio Pass

Allen C.R. 1957, San Andreas fault zone in San Gorgonio Pass, Southern California: Geological Society of America Bulletin, v. 68, p. 315– 350, doi: / (1957)68[315:SAFZIS]2.0.CO;2. Cooke, M. L., & Dair, L. C. (2011). Simulating the recent evolution of the southern big bend of the san andreas fault, southern california. Journal of Geophysical Research.Solid Earth, 116(4) doi: "The Enigmatic San Gorgonio Pass." The Enigmatic San Gorgonio Pass. University Of Southern California, Feb Web. 20 June 2013.