Notes on the CREWES Interface Parameter Converter

The Interface Parameter Converter is designed to be a convenient tool for converting data on interfaces between earth layers into various useful formats. For instance, given the density (r), compressional velocity (a), and shear velocity (b), for each side of the interface, one can calculate ratios (e.g. b1/a1), or conrasts (e.g. Dr/r)that are commonly used in AVO applications. Some other symbols employed in this applet are s (the Poisson ratio) and b/a = (b1+b2)/(a1+a2). The subscript "1" indicates the upper layer and "2" the lower layer.

For questions or suggestions regarding this applet, contact Chuck Ursenbach (