Abstract
The paper presents an educational version of the tomography algorithm BASIC TOMO, which is aimed at demonstration of the role of different controlling parameters in inversion. The algorithm uses a simplified approximation of rays with straight lines and a model parameterization with the use of rectangular cells. The tomography procedure is reduced to solving a system of linear equations, which is performed using the LSQR method. This study presents several exercises showing the role of different factors in inversion, such as grid spacing, smoothing, ray configuration, and noise in the data. The calculations are performed for different types of synthetic models. All the results can be easily reproduced using the appended version of the BASIC TOMO code.
Highlights
Seismic tomography is a method, which is effectively used for studying Earth structure on scales from centimeters to thousands kilometers
BASIC TOMO is a tomography code written in FORTRAN language
The BASIC_TOMO is a simple tomography code, which is very convenient for teaching and for investigating several fundamental aspects related to performing tomographic inversion
Summary
Seismic tomography is a method, which is effectively used for studying Earth structure on scales from centimeters to thousands kilometers. In a case of using passive sources, the inversion is complemented with an additional problem of determination of source parameters (Koulakov, 2009) This and other difficulties make using integral transformations non-suitable for practical seismic tomography applications. To investigate issues related to practical performing the tomography inversions, I have developed a simplified algorithm BASIC TOMO, which allows for very easy definition of synthetic models and ray geometry. This is a convenient instrument for teaching students the basics of tomography inversion. I describe the general workflow of the BASIC TOMO algorithm and present several tests showing the role of various controlling parameters in inversion
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
