Preferred final model obtained using 1st arrivals (Pg and Pn), reflections (PmP) and zero-offset MCS reflections from the sediments and basement (Zelt and Smith, 1992). This is a "minimum-parameter model". The tomographically-derived moho is superimposed as yellow contours corresponding to 7.0 and 7.6 km/s.
Comparison of the preferred final model, tomographic model obtained using first arrivals only, and the Moho from the 3 different models: preferred model, tomographic model from first arrival inversion, and tomographic inversion of PmP reflections.
Estimated lateral resoltuion of velocity from the first arrival data obtained using a series of checkerboard tests.