3D Inversion for Seismic Structure and Hypocenters in Germany

The main task of this work has been to investigate the effects of anisotropy onto the propagation of seismic waves along the Upper Mantle below Germany and adjacent areas. By the 3D tomographic investigations have been done here for the crust and the upper mantle, considering the influence of anisotropy, a gap for the investigations in Europe has been closed. At the beginning, a precise analysis of the residuals (RES, the difference between calculated and observed arrivaltime) has been done which confirmed the existence of anisotropy for Pn-phases. The application of the elliptical correction for anisotropy in the Upper Mantle has resulted in a better fit of the vertical layered 1D-Model, compared to the results of preciding seismological experiments and 1D and 2D investigations. The simultaneous inversion has showed an optimization of the relocalization of the hypocenters and the reconstruction of the seismic structure in comparison to the geology and tectonic, as described by other investigations. The investigations for the seismic structure and the relocalization have been confirmed by several different tests.