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- W4230738049 abstract "The limitations of ray-based forward solutions in seismic tomography are theoretically well known. To correctly represent the physical forward problem in seismic tomography, application of full three-dimensional (3-D) wave theory would be required. Up to now this is not possible for the size of a typical local earthquake study. With the concept of fat rays resembling the waves Fresnel volume, a more complete, physically consistent and accurate solution to the forward problem is available. In this paper, we present an approach to include fat rays in local earthquake tomography, called Fatomo. The comparative study with synthetic data and inversion results with Fatomo and a ray-based approach to local earthquake tomography, SIMULPS, reveals new insights into the role of resolution and model parameterization in local earthquake tomography. Intuitively expected effects of fat rays on resolution estimates, such as higher node sampling values and lower resolution diagonal element values for wider fat rays can be seen in the results. For ideal model parameterization, differences between fat ray and ray tomography are small. Our results document, however, that the influence of model parameterization is less critical for fat ray tomography than for ray tomography." @default.
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- W4230738049 date "2001-10-01" @default.
- W4230738049 modified "2023-09-23" @default.
- W4230738049 title "Local earthquake tomography between rays and waves: fat ray tomography" @default.
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- W4230738049 doi "https://doi.org/10.1016/s0031-9201(01)00266-7" @default.
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