Figure 14. (a) horizontal prediction of 3-month viscoelastic relaxation-only model for the 120km coseismic fault based on the viscosity structure of 50km LAB, having a cold nose to the wedge and the 5*1018 Pa-s wedge viscosity. (b) Best fit afterslip model based on the signal residual (GPS observation – viscoelastic relaxation contribution). (c) total vertical fit (model prediction = afterslip prediction + viscoelastic relaxation prediction). The error ellipse show 95% confidence. The region of the rupture areas is > 1m slip. Dashed light grey lines outlines the depth contours from the Slab2 model (Hayes et al., 2018). The white barbed line shows the plate boundary between the Pacific plate and the North American plate.