Earthquake Source Imaging



We follow several approaches to earthquake source imaging, which translates into mapping the space-time evolution of the earthquake rupture process on the fault plane(s). In so doing, we estimate kinematic source parameters, like the displacement (=slip) on the fault, the rupture propagation speed, and the slip-rate function (and its parameterization). In earthquake source inversion, we deploy nonlinear inversion methods, linearized inversions, as well as Bayesian estimation of the postiori PDF (probability density function), using seismic and geodetic data, to quantify the earthquake rupture evolution. This work is tightly linked to our Source Inversion Validation project, an international collaboration to verify source inversion methods and to develop methods to rigorously quantify the uncertainties in earthquake source inversion.