Exciting news! We're transitioning to the Statewide California Earthquake Center. Our new website is under construction, but we'll continue using this website for SCEC business in the meantime. We're also archiving the Southern Center site to preserve its rich history. A new and improved platform is coming soon!

Geophysical Research Letter

Simon D. Daout, Sylvain D. Barbot, Gilles Peltzer, M P. Doin, Zhen Liu, & Romain Jolivet

Published November 9, 2016, SCEC Contribution #7112

Due to the limited resolution at depth of geodetic and other geophysical data, the geometry and the loading rate of the ramp-d├ęcollement faults below the metropolitan Los Angeles are poorly understood. Here, we complement these data by assuming conservation of motion across the Big Bend of the San Andreas Fault. Using a Bayesian approach, we constrain the geometry of the ramp-d├ęcollement system from the Mojave block to Los Angeles and propose a partitioning of the convergence with 25.5 +- 0:5mm/yr and 3.1 +- 0.6mm/yr of strike-slip motion along the San Andreas Fault and the Whittier Fault, with 2.7 +- 0.9mm/yr and 2.5 +- 1.0mm/yr of updip movement along the Sierra Madre and the Puente Hills thrusts. Incorporating conservation of motion in geodetic models of strain accumulation reduces the number of free parameters and constitutes a useful methodology to estimate the tectonic loading and seismic potential of buried fault networks.

Daout, S. D., Barbot, S. D., Peltzer, G., Doin, M. P., Liu, Z., & Jolivet, R. (2016). Geophysical Research Letter. Constraining the Kinematics of Metropolitan Los Angeles Faults 1 with a Slip-Partitioning Model, 43(21), 11,192-11,201.