Fig. 8From: Local and regional minimum 1D models for earthquake location and data quality assessment in complex tectonic regions: application to SwitzerlandHistograms of travel-time residuals for different observational weights as indicated. Travel-time residuals were computed using the local minimum 1D models w43.north (dark gray) and the regional minimum 1D model w43.all (light gray). For each histogram the number of observations, mean and standard deviation (sigma) are given. See Table 3 for primary statistical parameters of all data setsBack to article page