A shear wave analysis system for semi-automatic measurements of shear wave splitting above volcanic earthquakes: descriptions and applications

Abstract

Our interest is the study of the seismograms with the purpose of monitoring and modelling volcanoes. In particular, since the shear waves bring information about the anisotropic system characterizing the shallow crust, they are also sensitive to all temporal variations caused by changes in the stress field acting on the area. Therefore we intend to realize an algorithm that can provide shear wave splitting estimates in quasi-real time and in a semi-automatic way. Finally we perform validation tests on both real and synthetic data, in order to define the accuracy and validity range of our program.