Summary

Traveltime tomography is a robust tool for determining the low wavenumber part of the earth's velocity distribution. Three types of traveltime data can be inverted: reflection traveltimes, transmission traveltimes and refraction traveltimes. The reconstructed velocities can be used to determine static corrections for CMP data, migration velocities for CMP data or interwell lithology for crosswell studies. Other applications include whole earth tomography and industrial applications such as acoustic medical tomography.