Subduction factory interaction of subduction-related magma with the overlying lithosperic wedge

III Abstract The world's largest earthquakes, the most destructive tsunamis and the most explosive vol- canism are generated at subduction zones at convergent plate margins. Despite of high societal and economic importance of these areas, there are still some poorly understood processes, such as the process of magma generation and ascent to the Earth surface. This thesis contributes to the solution of the problem of location of source areas of calc-alkaline magma and its migration. It consists of two parts: in the first one, the phenomenon of vol- canism at convergent plate margins and seismological background are described, while the second part explores structures in the lithosphere beneath volcanoes in the broader region of the Banda Arc (Indonesia). For the purposes of the research, the ISC hypocentral de- terminations based on data from the global seismic network, relocated by a procedure of Engdahl et al. and collected in the so called EHB database were used. The analyses of spa- tial, time and magnitude dependencies in the dataset of earthquakes occurring within the Banda Arc area enabled us to formulate several conclusions: The occurrences of strong teleseismically recorded earthquakes in the lithospheric wedge beneath volcanoes suggests that the respective rock medium is not partially melted...