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CIG will be sponsoring two pre-meeting workshops on May 17th as part of the Earthscope National Meeting in Austin, TX.
These two pre-meeting workshops will focus on training in the use of two finite-element codes for long-term (Gale), and short-term (PyLith) crustal deformation. Register for these tutorials using the link below. Registration for the Earthscope National Meeting is done directly through the EarthScope website at Earthscope National Meeting.
Morning coffee service and afternoon break service will be provided for all workshops in the conference break area, located on the second level of the AT&T Center.
Lunch will also be provided between 12pm-2pm in the Tejas Dining Room, also located on the second level.
PyLith and Gale are open-source, free software with binaries available for Mac, Linux, and Windows platforms. PyLith is developed by CIG in collaboration with the USGS and GNS Science, and Gale is developed by CIG in conjunction with the Victorian Partnership for Advanced Computing and Monash University.
Gale is a 2D/3D parallel code that solves problems in orogenesis, rifting, and subduction with a variety of boundary conditions, including free surfaces and coupling to surface erosion models. Gale is bundled with a number of rheologies and extensive documentation, and is extensively benchmarked. Precompiled binaries make it easy to start using Gale on Windows, Mac, or Linux laptops and desktops. Thorough installation notes allow users to then install Gale on the largest supercomputers and run the same input files.
During the session, participants will be given background theory, an overview of the code including its strengths and weaknesses for solving geodynamic problems, and instruction on downloading and running these codes (including running them on the NSF TeraGrid), and post-processing (visualizing) the results. As time permits, the workshop will also cover how to implement new rheologies and custom surface processes in Gale.
The tutorial will focus on the PyLith crustal deformation modeling software, while also providing an introduction to the use of the CUBIT meshing software developed by Sandia Labs.
PyLith is a finite-element code for 2-D and 3-D dynamic and quasi-static modeling of crustal deformation. The target applications span spatial scales ranging from tens of meters to hundreds of kilometers and temporal scales for dynamic modeling ranging from milliseconds to minutes or temporal scales for quasi-static modeling ranging from minutes to thousands of years. Current features include prescribed fault ruptures with multiple sequential earthquakes and aseismic creep, spontaneous fault ruptures with a variety of fault constitutive models, time-dependent Dirichlet and Neumann boundary conditions, absorbing boundary conditions, time-dependent point forces, and gravitational body forces. PyLith supports infinitesimal and small strain formulations for linear elastic rheologies, linear and generalized Maxwell viscoelastic rheologies, power-law viscoelastic rheologies, and Drucker-Prager elastoplastic rheologies.
During the training session, participants will be given background theory, an overview of PyLith and CUBIT including their strengths and weaknesses for geodynamic problems, and instruction on constructing a finite-element mesh, running a simulation, and post-processing (visualizing) the results.
