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)