Implementation of Hagedoorn's plus-minus method in Matlab GUI

Siming Lv, Kristopher A. H. Innanen

The basic theory of seismic refraction and one of the most popular refraction methods- plus-minus are elaborated. Despite of the limitations of plus-minus method, such as can only deal with single interface model with inclination angle smaller than 10 degrees and efficient only in "analyze window", researchers benefit by its convenience to roughly explore the subsurface structure and acquire significant information of layers. This pragmatic method is realized in Matlab as a graphical user interface (GUI), as a more approachable tool for beginners. From finite difference model and field data tests, usability of the tool is proved.