Dear all, I need a friendly reference from any paper or book chapter to study about seismic ray tracing. I read about seismic ray theory from Cerveny's book, and it's very hard to understand because it contains a very high level mathematical language. I also need a reference that gives kind of flowchart explanation how to do seismic ray tracing. I'm glad if you could help me. Thankyou.
Dear Yohanes
Before indicating you some references as you requested, I want underline that when we deal about kinematic raytracing we need to distinguish between the "ray tracing (strictly)" and the "ray tracing problem and its solution" not all solution of ray tracing problem include a ray tracer. I suppose that you are interested in solving raytracing problem. The two main approaches to solve the kinematic raytracing problem are: shooting and bending methods, only the first really needs of a ray tracer. In technical literature sometime the two concepts are confused.
I advise you to read the paper ( Advances in Geophysics, 49, 203-267-2007 by N. Rawlinson, J. Hauser, M. Sambridge). It is a short overview paper on (Seismic ray tracing and wavefront tracking in laterally heterogeneous media). In particular, you can read firstly the introductive chapter and the chapter 2 on the raytracing schemes: in particular on shooting (2.1) and bending (2.2) methods. In this paper you will also find other approaches based on the direct solution of the eikonal equation .
Furthermore you can find simple scripts (and demos) in Matlab about raytracer and raytracing in the CREWES site (https://www.crewes.org/ResearchLinks/FreeSoftware/)
Dear Yohanes,
I think that the overview paper performed by the group of Australian National University "Seismic ray tracing and wavefront tracking in laterally heterogeneous media" that Roberto De Franco mentioned is a very good reference.
If you work on tomography, I also recommend:
- "Ray tracing applied to travel time seismic tomography: Theory and examples", by E. Cardarelli (2003), BGTA, 44(3): 281-305;
And, then, 3 papers (for me a little more difficult to digest) if you are interested in model lateral heterogeneities:
- "Parameterized shooting of seismic rays in a spherical earth with discontinuities", by S. Sekine and K. Koketsu (2001), GJI, 146, p. 497-503;
- "Segmentally Iterative Ray Tracing in Complex 2D and 3D Heterogeneous Block Models" by T. Xu et al., (2010). BSSA, 100 (2), pp. 841-850.
- "A Fast and Accurate Scheme for Travel-Time Computations and Ray-Path Determinations of Global Seismic Phases in a Laterally Heterogenous Model", by G.J. Huang, C.Y. Bad and S. Greenhalgh, (2013), SRL, 84(3) p. 505-515.
If you want to test the 1-D computation of travel times of seismic waves, I strongly suggest to you the Matlab package TTBOX by Martin Knapmeyer (2004).
You can download it and find more references here:
https://www.dlr.de/pf/en/desktopdefault.aspx/tabid-4880/8104_read-36233/
Currently, I am developing the 3-D implementation of this code.
I hope I have helped you,
Cheers,
Leonardo
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