以走時層析成像方法解析希臘地區的三維速度結構

The Greek region (Mainland Greece and the Aegean Sea) represents an area affected by subduction in the south Aegean, by extension in mainland Greece and by continental collision in NW Greece. A highresolution 3D velocity model would thus enhance our understanding of the lithospheric structure for such a complicated area and would also help the interpretation of regional tectonics. In this proposal we suggest to use all the available earthquakes recorded during the last 20 years by both permanent and temporary networks in the Greek region for the purpose of building a massive dataset (>120,000 events) that can be used in a tomographic inversion for determining the 3D velocity structure. Except from producing a 3D model of P- and S-wave velocities, this study will also use the relocated events in order to determine the spatial distribution of the seismogenic layer thickness. This can be used further for estimating with higher accuracy the maximum moment magnitude along mapped active faults throughout the study area.