4.4 3-Month Afterslip Models with Maximum Viscoelastic Relaxation Contribution Assumed.
We evaluated a range of viscoelastic relaxation models, and consider end members with the minimum and maximum displacements caused by that mechanism as described in section 4.2; the minimum contribution being negligible and thus equivalent to the afterslip-only models already described. For the model with the maximum contribution from viscoelastic relaxation, we subtracted the viscoelastic model prediction from the data and treated the residual as the afterslip contribution. We then ran the same tests as described in section 4.3, and find that even with the maximum viscoelastic relaxation contribution considered, our afterslip models also favors a narrower fault width with 120km width. In this case, the overall minimum \(\chi^{2}\ \)is 9.02, lower than for afterslip-only. The best fit V0 is smaller than the models without a viscoelastic contribution, withV0 = 0.45m/yr. Figure 11 shows the best fit afterslip models with maximum viscoelastic relaxation prediction for coseismic models with fault width of 10km, 10km and 160km.
(a) (b) (c)