GeoTom has many years of experience processing clients’ tomographic data. GeoTom’s experience and the familiarity with the software provide efficient and reliable data processing. Clients can either provide seismograph files for use in picking traveltimes (or amplitudes) which are then used in tomographic calculations of velocity (or attenuation) or provide traveltimes (or amplitudes) picked by the client which are used in the tomographic calculations. The report of results can be informal, just providing results, or GeoTom can provide a more formal report.