Application of the discontinuous Galerkin method to study the source mechanisms for Love waves in ambient noise

To produce detailed images of the crust using noise correlation studies and to understand the ocean - solid Earth interaction processes we investigate the behavior and distribution of ambient noise sources, especially focused on the relative contribution of Love waves to the ambient noise field. Therefore, we apply the discontinuous Galerkin (DG) method, which makes use of unstructured tetrahedral meshes combined with a time integration scheme solving the arbitrary high-order derivative (ADER) Riemann problem. The ADER-DG method is high-order accurate in space and time, beneficial for reliable simulations of high-frequency wavefields over long propagation distances. Due to the ease with which tetrahedral grids can be adapted to complex geometries, undulating topography of the Earth's surface and interior interfaces can be readily implemented in the computational domain.