Nicholas Rawlinson

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We investigate the potential advantages and pitfalls of using an irregular interface parametriza-tion in 3-D wide-angle seismic traveltime tomography. Several synthetic tests are performed using an interface surface consisting of a mosaic of cubic B-spline surface patches and a source–receiver array designed to produce a highly variable distribution of(More)
We present a practical grid-based method in 3-D spherical coordinates for computing multiple phases comprising any number of reflection and transmission branches in heterogeneous lay-ered media. The new scheme is based on a multistage approach which treats each layer that the wave front enters as a separate computational domain. A finite-difference eikonal(More)
The recent proliferation of passive seismic array experiments in southeast Australia has resulted in the dense coverage of Tasmania, Victoria and parts of South Australia and New South Wales by some 260 plus seismometers in less than a decade. In total, six separate temporary deployments have been carried out in order to build this large network of(More)
Simple models involving the gradual outboard accretion of material along curvilinear subduction zones are often inconsistent with field-based evidence. A recent study using 3-D geodynamic modelling has shown that the entrainment of an exotic continental fragment within a simple subduction system can result in a complex phase of growth. Although kinematic(More)
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