3D Offshore Benchmark of Subduction Environment in Realistic Visco-Elastic Representation

GO_3D_OBServer is the prototype crustal-scale synthetic model of the subductions zone, inspired by the geological setting of the Nankai Trough, Japan. It is developed for the purpose of testing various tomographic and inversion techniques dedicated for the regional seismic imaging, with the special focus on FWI of wide-angle OBS data.
The model contains various geological features of different scales with well-defined geological units as well as the small scale, random stochastic perturbations. It is defined as a 3D cube of dimension 30 km x 175 km x 100 km with the uniform grid size of 25 m – leading to ca. 33.6*10e^9 DOF.

The realistic parametrization includes Vp, Vs, Rho, Qp and Qs and makes it suitable for multiparameter FWI, however it can be as well used to test various acquisition geometries, optimization and regularizations schemes, misfit functions, traveltime tomography approaches, uncertainty estimations etc.

The final version of the model will be freely released as a benchmark model, to improve the ability of building high resolution regional-scale models of the Earth. We are open for the feedback from the geophysical community which might help us to make this model more realistic in terms of structure and parameterization.
For more information please contact Andrzej Gorszczyk