CALM: A software tool for rapid analysis and modeling of converted shear waves in wide-angle seismic data

Abstract

Modeling of the converted shear waves is an issue of major interest in wide-angle seismic prospecting, which is indicative of the lithological properties in sediments, the crust and the uppermost mantle. The active-source seismological community has long called for a rapid, automatic and comprehensive modeling of these data. In this paper, we present a user-friendly software tool named CALM (standing for Converted wAve veLocity Modeling) for the converted shear wave modeling in wide-angle seismic data, which provides the first Graphical User Interface that is capable of determination of conversion modes/interfaces and automatic modeling of shear wave structures. The capacity of the presented software is demonstrated by a realistic case in the northern South China Sea continental margin, which analyzes the potential conversion modes of subsurface interfaces and obtains the crustal Vp/Vs structures from wide-angle seismic data.