VTI Explorer

Quick Links


You will need to have the Java runtime environment (JRE) installed on your computer in order to use this software. As of Java Version 7 Update 51, you will also need to add https://www.crewes.org to the Java Exception Site List. This has been tested in Windows 10 using Microsoft Internet Explorer, Microsoft Edge and Mozilla Firefox.

To start the VTI Explorer click on the 'Launch' button above.

Version History

Chuck Ursenbach, 2002

Technical Notes

The VTI Explorer is similar in operation to the CREWES Zoeppritz Explorer and to the CREWES Reflectivity Explorer. Those web pages should be referred for notes on general use. The present utility differs in that it explores the behavior of the P-wave reflection coefficient in the presence of anisotropy. The present version can calculate both exact and linearized coefficients for VTI (vertical transverse isotropy) media. For comparison it can also calculate exact (Zoeppritz) and linearized (Aki-Richards) coefficients for the corresponding isotropic media.


  1. Exact VTI coefficients: Daley and Hron, 1977, "Reflection and transmission coefficients for transversely isotropic solids", Bull. Seis. Soc. Am., 67, 661-675.
  2. Linearized VTI coefficients: Ruger, 1997, "P-wave reflection coefficients for transversely isotropic models with vertical and horizontal axis of symmetry", Geophysics, 62, 713-722.

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