A case study is presented using Northparkes Mine microseismic (MS) events located by forward calculating P- and S-wave travel times using ray-tracing and wavefront construction techniques through velocity structures that mimic heterogeneity and damage in the rock. By using these models it is expected to get a better resolution of the extent, position and structure of the seismogenic zone. Conversely, the location of high-quality events provides a means to validate the fit of strain models.