USC Geodynamics Earth Science Computing Environment (UGESCE)

A VirtualBox Linux installation (i.e. a repacking of existing software) that contains SEATREE, iGMT, GMT, and a range of Earth science software and datasets.

• UGESCE web site

Solid Earth Research and Teaching Environment (SEATREE)

We are developing a python-based, modular, graphical and script driven interface to solid Earth geodynamics and seismology modeling tools. The goal is to provide easy access to research tools for teaching, and to facilitate interdisciplinary research. SEATREE includes an interface to the hc mantle flow tool and seismic mantle tomography tools. See the SEATREE project web page for the current status, including full access to our current sources on our SVN server.

Reference:

• Milner, K., Becker, T. W., Boschi, L., Sain, J., Schorlemmer, D. and H. Waterhouse: The Solid Earth Research and Teaching Environment: a new software framework to share research tools in the classroom and across disciplines. Eos Trans. AGU, 90, 12, 2009. (PDF).

iGMT: Graphical user interface and GMT script generator

A graphical user interface for the Generic Mapping Tools (GMT) written in Tcl/Tk and used around the world to teach GMT. Useful to learn and teach GMT, and to generate simple example scripts for general Earth science map making.

• igmt-recent
• igmt_v1.2-20080724.tgz

Reference:

• Becker, T. W. and Braun, A.: New program maps geoscientific datasets interactively. EOS Transactions AGU, 79 (42), 505-506, 1998. (PDF)

fstrack: Seismic anisotropy from flow predictor

Packages estimates seismic anisotropy from mantle flow. Includes particle tracking in spherical flow (based on GMT/netcdf grd files, finite strain ellipsoid computation, Kaminski & Ribe (2001) type LPO texture formation (DREX by Kaminski), as well as single and multiple layer SKS seismogram synthetics and splitting computation (codes from Schulte-Pelkum and Blackman). A version of fstrack was used for Becker et al. (2006a, 2006b, 2008).

Please keep in mind that this is a research product and so subject to change; installation and usage is described in readme files, but may require some user intervention. Also note that a lot of the software in this package is copyrighted by other people and you may wish to use the original codes (e.g. DREX) rather than our wrapped up versions. I strongly encourage you to send me an email in case you download this package, this way I will be able to keep you up to date on changes, bugs, etc. Here are the releases:

• latest fstrack tgz
• fstrack-0.2.2.102412.tgz

The main references for fstrack are:

• Becker, T. W., Schulte-Pelkum, V., Blackman, D. K., Kellogg, J. B., and O'Connell, R. J.: Mantle flow under the western United States from shear wave splitting, Earth Planet. Sci. Lett., 247, 235-251, 2006. (PDF)
• Becker, T. W., Kustowski, B., Ekström, G.: Radial seismic anisotropy as a constraint for upper mantle rheology. Earth Planet. Sci. Lett., 267, 213-237, 2008. (PDF)

hc: Hager & O'Connell spherical flow computations

Global mantle circulation solver following Hager & O'Connell (1981). This software is a modular, C-language rewrite of Bernhard Steinberger's FORTRAN code and developed by Becker, Craig O'Neill, and others. The code has been tested for computation of velocities, tractions, and the geoid given incompressible, Newtonian flow in the mantle for only radially varying viscosity. The spherical harmonic format from Becker & Boschi (2002) can be read by HC to compute velocities for spherical harmonic models, and a graphical user interface to HC is provided by SEATREE.

Availability and documentation:

• HC is one of the modules of SEATREE which also provides a graphical user interface, editing tools, and example input data. I recommend to download HC with the SEATREE package, also included in UGESCE.
• A recent, local release is hc-1.0.3.080512.tgz (this is likely different from whatever binary and tar versions are hosted at CIG; those are updated less frequently)
• The most current development version of HC is hosted at CIG's subversion server at http://geodynamics.org/svn/cig/mc/1D/hc/.
• A packaged, standalone release and binaries are also available from HC's CIG page

Reference:

• Becker, T.W., O'Neill, C., and Steinberger, B. (2009): HC, a global mantle circulation solver. Available online at http://www.geodynamics.org/cig/software/hc, accessed 08/2011.

shansyn: spherical harmonics packages for GMT

My spherical harmonics analysis/synthesis software packages shana and shsyn which use GMT respectively Netcdf grd files for I/O, and interoperate with the seismic tomography models from Becker & Boschi (2002). The most recent code is here:

• latest release
• shansyn.1.0.8-060511.tgz

Reference:

• Becker, T. W. and Boschi, L.: A comparison of tomographic and geodynamic mantle models, Geochem., Geophys., Geosys., 3(1), 1003, doi:10.1029/2001GC000168, 2002. (PDF)

interact: boundary element fault interactions

An Okada (1992)-type boundary element program to compute displacements, stress and fault interactions. The main software is written in C and uses slighyly improved versions of the Okada Fortran routines.

You can read more on seismology projects page. The latest version can be downloaded here

• latest interact release (01/09/11)

Reference:

• Becker, T. W., Hardebeck, J. L., and Anderson, G.: Constraints on fault slip rates of the southern California plate boundary from GPS velocity and stress inversions. Geophys. J. Int., 160, 634-650, 2005. (PDF)

Minor scripts, tools, patches, etc.

• plot_ternary: A GMT script to generate ternary diagrams
  
• ssrf_surface: spherical GMT surface gridder
  A GMT surface-like wrapper routine for SSRFPACK by Renka which allows to interpolate irregular data on a sphere. (Now included, differently, in GMT itself.) You can read more on my iGMT project page, or download the latest version:
  • ssrf.010506.tar.gz
• grd2vtk: convert a single, or several, layered Netcdf (GMT) grd files into VTK format as used, e.g., by Paraview. See README for grd2vtk and grd2vtk_cart for comments.
• ndk2meca.awk: Gawk script to convert ndk to psmeca
  The script will convert Global CMT ndk format output to GMT psmeca format and select mechanism types.
• CitcomS patches (GMT grd support, VTK formatting) are now mostly merged into the CIG SVN version