An international workshop on "Seismic waves in laterally inhomogeneous media VI" took place at the Castle of Hruba Skala on June 20-25, 2005. It was organized in the framework of the MAGMA Center in cooperation with the Geophysical Institute of the Academy of Sciences of the Czech Republic. The 61 participants from 14 countries presented 58 oral and poster contributions. Proceedings from the workshop will be published in two special issues of the international journal Studia Geophysica et Geodaetica. Four participants were financially supported by MAGMA, viz Kolja Gross (Freie Universitšt, Berlin), Reneta Raykova (Geophysical Institute, Sofia), Dirk Roessler (University of Potsdam) and Sens-Schoenfelder (University of Leipzig).