Applicability and Bias of VP/VS Estimates by P and S Differential Arrival Times of Spatially Clustered Earthquakes - why the method of Lin and Shearer (2007) will yield biased results in nearly all realistic configurations

Frederik J Tilmann, Freie Universität Berlin, Institute for Geological Sciences, Berlin, Germany; GFZ German Research Centre for Geosciences, Potsdam, Germany, Mauro Palo, Deutsches GeoForschungsZentrum GFZ, Potsdam, Germany and Bernd Schurr, Deutsches GeoForschungsZemtrum GFZ, Potsdam, Germany