Downloadable material for tomographic inversion in iregular cells
and the RUM seismic model.

Malcolm Sambridge and Oli Gudmundsson

Research School of Earth Sciences, Australian National University, Canberra, ACT 0200, Australia.

Code

Note that all software described here is not public domain. It is freely available for research and teaching purposes only. If it is used for any other purpose, in whole or in part, permission needs to be obtained in writing from the authors.

Software for generating and navigating through a Delaunay triangulation in 2-D . This tar file contains a simple driver example program as well as an interactive graphics front end as an example, which performs natural neighbour interpolation of a 2-D dataset onto a regular Cartesian grid. (This was software was written jointly with Jean Braun, RSES)

NN_quick - unix compressed tar file containing source code and a Solaris executable of nn_quick front end (731k).

NN_quick - unix compressed tar file containing source code and a DEC (Alpha) executable of nn_quick front end (328k).

NN_quick - unix compressed tar file containing source code and a SunOS executable of nn_quick front end (1.4Mb).

Note that NN_quick is free for research and teaching purposes, but we need to keep track of who has it and so a password is required before downloading it. Please email Jean Braun for a password.

Click here - for unix gzipped tar file containing source software for navigating through 3-D Delaunay tetrahedra or 3-D Voronoi polyhedra, e.g. finding which cell contains at given (r,theta,phi) point. This can be used to build tomographic systems of equations in 3-D (as described in Sambridge and Gudmundsson, 1998 ). Contains a simple driver example program. (This codes requires a method for generating the 3-D Delaunay tetrahedra. The qhull program available from the Geometry Center ( qhull home page ) can be used. See tar file for details. (68k)

Click here - for unix gzipped tar file containing software for evaluating the P or S wavespeed at any location in Earth through the RUM model. This file contains the RUM model and is self-contained (2.3Mb).

Click here - for unix gzipped tar file containing software for calculating travel times and travel time derivatives with respect to location parameters, of major seismic phases through the RUM model. This file contains the RUM model and is self-contained (2.0Mb).

Data and images

Click here - for a gzipped tar file containing the data set of contours of all of the worlds slabs as defined by seismicity. (278k) From Gudmundsson and Sambridge (1998) .

Click here - for a gzipped tar file containing the set of geomview files for interactive viewing of 3-D slab models constructed from Delaunay tetrahedra. These images are input files to the geomview program available from the Geometry centre homepage . (1.2Mb)

Colour images of slab models and associated information can be found on the www page describing the RUM project. Further details of images and data can be found in Gudmundsson and Sambridge (1998).

Papers

Click here - for postscript version of Gudmundsson and Sambridge (1998),
"A regionalized upper mantle (RUM) seismic model." ,
J. of Geophys. Res., No. B4, 7121-7136, 1998. (gzipped file 2.5Mb)

Click here - for postscript version of Sambridge and Gudmundsson (1998),
"Tomography with irregular cells." ,
J. of Geophys. Res., 103, No. B1, 773-781, 1998. (gzipped file 865k)

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