f Traveltime tomography in anisotropic media: some examples

Travel-time tomography is often applied to cross-hole seismic data and images of the velocity distribution are used to provide stratigraphic and/or structural interpretations. The technique is often applied in regions where one might expect significant anisotropy (for example in complex, layered stratigraphy or in fractured rocks). Without accounting for anisotropy, the tomographic images suffer from distortions that can render the results un-interpretable.