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We present a new method to invert variable stress changes of fractures fromInSAR ground displacements. Fractures can be either faults or magma intrusions,embeded in a 3D heterogeneous crust with prominent topographies. The method isbased on a fictituous domain approach using a finite element discretization ofXFEM type. A cost function involves the misfit between the solution of thephysical problem and the observed data together with the smoothing terms.Regularization parameters are determined by using L-curves. The method is thenreformulated to be applied to InSAR data (masked and noisy), projected inEarth-Satellite directions. Synthetic tests confirm the efficiency andeffectiveness of our method.

A new method to invert InSAR data to resolve stress changes on a fracture embedded in a 3D heterogeneous crust