Fig. 8
From: Using a grid-search approach to validate the Graves–Pitarka broadband simulation method
RotD50 residuals for the Northridge simulation with the lowest |M|avg score plotted as a function of distance at six different oscillator periods. Oscillator period is shown at the lower right of each panel. Symbols are color-coded to the site Vs30 value with blue-shading for the 22 sites having Vs30 > 400 m/s and red-shading for the 31 sites having Vs30 < 400 m/s. Least-squares fits with 95% confidence bounds are indicated by the solid and dashed lines, respectively, for each Vs30 group at each oscillator period