Residual maps and interpolated fields at epoch 2018.59. A) Velocity residual map (observed minus ZS2017-predicted); B) Maximum shear strain rate residual grids; C) Dilatation rate residual grids. Red vectors indicate extension, blue vectors indicate contraction. Areas of interest described are indicated by red dashed boxes including magnitudes. Values of strain rate are indicated for each area highlighted by a red contour. When important variations are observed, the mean and the maximum values (‘mean/max’) are given. For areas where strain rate is homogeneous, only the mean value is indicated. Source: Source: (Klein et al., 2019).