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  1. 2021 Early Earth Influence of Radiogenic Heating on Mid-Ocean Ridge Depths and Seafloor Subsidence

    02 Nov 2021 | Contributor(s): Keneni Godana

    2021 SMOREs ShowcaseKeneni Godana, University of Illinois at Chicago

  2. 2021 Bayesian Uncertainty Quantification of Subduction Zone Rheology from the Geoid

    02 Nov 2021 | Contributor(s): Elena Ehrlich

    2021 SMOREs ShowcaseElena Ehrlich, North Carolina State University

  3. 2021 As Above So Below: A Simulation of the Continental Lithosphere and LLSVPs as Thermal Insulators Using ASPECT

    02 Nov 2021 | Contributor(s): Dante Hickey

    2021 SMOREs ShowcaseDante Hickey, Reed College

  4. ASPECT

    31 Oct 2021 | Software: Download | Contributor(s): Wolfgang Bangerth, Juliane Dannberg, Menno Fraters, Rene Gassmoeller, Anne Glerum, Timo Heister, Robert Myhill, John Naliboff

    A finite element parallel code to simulate problems in thermal convection in both 2D and 3D models.ASPECT is a code to simulate problems in thermal convection. Its primary focus is on the simulation of processes in the earth's mantle, but its design is more general than that. The primary...

  5. SPECFEM3D Cartesian

    30 Oct 2021 | Software: Download | Contributor(s): Dimitri Komatitsch (primary-developer), Jean-Pierre Vilotte (primary-developer), Jeroen Tromp (primary-developer), Daniel Peter (primary-developer), SPECFEM Development Team

    SPECFEM3D Cartesian simulates acoustic (fluid), elastic (solid), coupled acoustic/elastic, poroelastic or seismic wave propagation in any type of conforming mesh of hexahedra (structured or not.) It can, for instance, model seismic waves propagating in sedimentary basins or any other regional...

  6. SPECFEM3D GLOBE

    30 Oct 2021 | Software: Download | Contributor(s): Dimitri Komatitsch (primary-developer), Jean-Pierre Vilotte, Jeroen Tromp (primary-developer), Daniel Peter (primary-developer), SPECFEM Development Team

    SPECFEM3D_GLOBE simulates global and regional (continental-scale) seismic wave propagation.Effects due to lateral variations in compressional-wave speed, shear-wave speed, density, a 3D crustal model, ellipticity, topography and bathymetry, the oceans, rotation, and self-gravitation are all...

  7. SPECFEM3D_GEOTECH

    29 Oct 2021 | Software: Download | Contributor(s): Hom Nath Gharti, Dimitri Komatitsch, Leah Langer, Roland Martin, Voker Oye, Jeroen Tromp, Uno Vaaland, Zhenshen Yan

    SPECFEM3D_GEOTECH is an open-source command-driven software for 3D slope stability analysis and simulation of 3D multistage excavation based on the spectral-element method.SPECFEM3D_GEOTECH is a free and open-source command-driven software for 3D slope stability analysis (for more details see...

  8. SPECFEM2D

    29 Oct 2021 | Software: Download | Contributor(s): Dimitri Komatitsch (primary-developer), Jean-Pierre Vilotte (primary-developer), Daniel Peter (primary-developer), SPECFEM Software Development Team

    SPECFEM2D simulates forward and adjoint seismic wave propagation in two-dimensional acoustic, (an)elastic, poroelastic or coupled acoustic-(an)elastic-poroelastic media, with Convolution PML absorbing conditions.Meshing is based for instance upon Gmsh, Cubit, GiD or a...

  9. SPECFEM1D

    29 Oct 2021 | Software: Download | Contributor(s): SPECFEM Development Team

    SPECFEM1D simulates seismic wave propagation in a one-dimensional heterogeneous medium. It is a small code that allows users to learn how a spectral-element program is written.See specfem.org.

  10. SW4

    29 Oct 2021 | Software: Download | Contributor(s): N. Anders Petersson, Bjorn Sjögreen, Houjun Tang, Ramesh Pankajakshan

    SW4 implements substantial capabilities for 3-D seismic modeling, with a free surface condition on the top boundary, absorbing super-grid conditions on the far-field boundaries, and an arbitrary number of point force and/or point moment tensor source terms. Each source time function can have one...

  11. AxiSEM

    28 Oct 2021 | Software: Download | Contributor(s): Tarje Nissen-Meyer (primary-developer), Martin van Driel (primary-developer), Simon Stähler (primary-developer), Kasra Hosseini (primary-developer), Stefanie Hempel (primary-developer), Lion Krischer (primary-developer), Alexandre Fournier (primary-developer)

    AxiSEM is a parallel spectral-element method for 3D (an-)elastic, anisotropic and acoustic wave propagation in spherical domains. It requires axisymmetric background models and runs within a 2D computational domain, thereby reaching all desired highest observable frequencies (up to 2Hz) in global...

  12. SEISMIC_CPML

    28 Oct 2021 | Software: Download | Contributor(s): Dimitri Komatitsch, Roland Martin

    SEISMIC_CPML is a set of eleven open-source Fortran90 programs to solve the two-dimensional or three-dimensional isotropic or anisotropic elastic, viscoelastic or poroelastic wave equation using a finite-difference method with Convolutional or Auxiliary Perfectly Matched Layer (C-PML or...

  13. FLEXWIN

    28 Oct 2021 | Software: Download | Contributor(s): Alessia Maggi

    The FLEXWIN software package automates the time-window selection problem for seismologists. It operates on pairs of observed and synthetic single component seismograms, defining windows that cover as much of a given seismogram as possible, while avoiding portions of the waveform that are...

  14. CitcomS

    28 Oct 2021 | Software: Download | Contributor(s): Louis Moresi, Shijie Zong, Lijie Han, Clint Conrad, Eh Tan, Michael Gurnis, Eun-seo Choi, Pururav Thoutireddy, Vlad Manea, Allen McNamara, Thorsten Becker, Wei Leng, Luis Armendariz

    CitcomS is a finite element code designed to solve compressible thermochemical convection problems relevant to Earth's mantle.

  15. Mineos

    28 Oct 2021 | Software: Download | Contributor(s): Guy Masters (primary-developer), John Woodhouse (primary-developer), Freeman Gilbert (primary-developer), Michael Ritzwoller (primary-developer), Misha Barmine, Sue Kientz

    Mineos computes synthetic seismograms in a spherically symmetric non-rotating Earth by summing normal modes.Attenuation, gravity and transversal anisotropy effects may be optionally taken into account. The package computes mode eigenfrequencies and eigenfunctions, Green's functions and...

  16. CitcomCU

    28 Oct 2021 | Software: Download | Contributor(s): Louis Moresi, Shijie Zhong, Michael Gurnis, Luis Armendariz, Eh Tan, Thorsten Becker

    CitcomCU is a finite element parallel code capable of modeling thermochemical convection in a three-dimensional domain appropriate for convection within the Earth's mantle.

  17. ConMan

    28 Oct 2021 | Software: Download | Contributor(s): Scott D. King, Arthur Raefsky, Brad Hager

    ConMan is a finite element program for the solution of the equations of incompressible, infinite-Prandtl number convection in two dimensions, originally written by Scott King, Arthur Raefsky, and Brad Hager.ConMan is a public domain program and is distributed free of charge to anyone who...

  18. Ellipsis3D

    28 Oct 2021 | Software: Download | Contributor(s): Richard Albert, Craig O'Neill

    Ellipsis3d is a three-dimensional version of the particle-in-cell finite element code Ellipsis, a solid modeling code for visco-elastoplastic materials. The particle-in-cell method combines the strengths of the Lagrangian and Eulerian formulations of mechanics while bypassing their limitations.

  19. HC

    28 Oct 2021 | Software: Download | Contributor(s): Thorsten Becker, Craig O'Neill

    HC is a global mantle circulation solver following Hager & O'Connell (1981) which can compute velocities, tractions, and geoid for simple density distributions and plate velocitiesThis particular implementation illustrates one possible way to combine the HC solver routines.

  20. PyLith

    27 Oct 2021 | Software: Download | Contributor(s): Brad Aagaard (primary-developer), Charles A. Williams (primary-developer), Matthew Knepley (primary-developer)

    PyLith is a finite-element code for dynamic and quasistatic simulations of crustal deformation, primarily earthquakes and volcanoes.Binary packages are available for macOS and Linux. Detailed installation instructions for the binary packages are in the PyLith manual. Use the PyLith...

  21. Relax

    26 Oct 2021 | Software: Download | Contributor(s): Sylvain Barbot (primary-developer)

    Relax implements a semi-analytic Fourier-domain solver and equivalent body forces to compute quasi-static relaxation of stress perturbation.It is not an acronym, it's a motto!The open-source program Relax evaluates the displacement and stress in a half space with gravity due to...

  22. Virtual Quake

    26 Oct 2021 | Software: Download | Contributor(s): John M. Wilson, Kasey W. Schultz, Eric M. Heiein, Michael K. Sacks, John B. Rundle

    Virtual Quake (formerly Virtual California) is a boundary element code that performs simulations of fault systems based on stress interactions between fault elements to understand long term statistical behavior.

  23. SELEN

    25 Oct 2021 | Software: Download | Contributor(s): Giorgio Spada (primary-developer), Daniele Melini (primary-developer)

    SELEN: a program for solving the "Sea Level Equation.The open source program SELEN solves numerically the so-called "Sea Level Equation" (SLE) for a spherical, layered, non-rotating Earth with Maxwell viscoelastic rheology. The SLE is an integral equation that was introduced in...

  24. LithoMop

    22 Oct 2021 | Software: Download | Contributor(s): Charles A. Williams (primary-developer)

    LithoMop is a finite element code for the solution of the visco-elastic/plastic deformation that was designed for lithospheric modeling problems.A newer version of LithoMop, called PyLith, has been released by CIG.

  25. Rayleigh

    22 Oct 2021 | Software: Download | Contributor(s): Nicholas Featherstone (primary-developer), Philip Edelmann (primary-developer), Rene Gassmoeller (primary-developer), Loren Matilsky (primary-developer), Ryan Orvedahl (primary-developer), Cian Wilson (primary-developer)

    Rayleigh is a 3-D convection code designed for the study of dynamo behavior in spherical shell geometry. It evolves the incompressible and anelastic MHD equations in spherical geometry using a pseudo-spectral approach.Rayleigh employs spherical harmonics in the horizontal direction and...

  26. Gale

    22 Oct 2021 | Software: Download | Contributor(s): Louise Moresi (primary-developer), Walter Landry (primary-developer), Luke Hodkinson (primary-developer), Susan Kientz

    Gale is a 2D/3D code for the long-term tectonics community. The code solves problems related to orogenesis, rifting, and subduction.About the cover: A 3D simulation of a mid-ocean ridge courtesy of Garrett Ito.

  27. Calypso

    22 Oct 2021 | Software: Download | Contributor(s): Hiroaki Matsui (primary-developer)

    Calypso is a set of codes for magnetohydrodynamics (MHD) dynamo simulation in a rotating spherical shell using spherical harmonics expansion methods. Solve MHD equations in a rotating spherical shell Treat conductive fluid with Boussinesq approximation Inner core can have...

  28. Plasti

    22 Oct 2021 | Software: Download | Contributor(s): Seam Willett (primary-developer), Chris Fuller (primary-developer)

    2D ALE (Arbitrary Lagrangian Eulerian) code donated to CIG by Sean Willett and Chris Fuller of the University of Washington. The code originated at Dalhousie University in Canada.

  29. SNAC

    22 Oct 2021 | Software: Download | Contributor(s): Eunseo Choi (primary-developer)

    Updated Lagrangian explicit finite difference code for modeling a finitely deforming elasto-visco-plastic solid in 3D.In SNAC, nodal velocities satisfying a weak-form of the momentum balance are obtained as the nodal solution. SNAC shares a mathematical foundation, and thus major advantages,...

  30. SpatialData

    21 Oct 2021 | Software: Download | Contributor(s): Brad Aagaard (primary-developer)

    A library for specifying spatial variation of parameters for boundary conditions, material properties, etc. Includes support for geographic projectsion via Proj4 and nondimensionalization. Used in PyLith.

  31. Exchanger

    21 Oct 2021 | Software: Download | Contributor(s): Eh Tan (primary-developer)

    Exchanger is a package containing several C++ base classes. These classes, when customized for a solver, can provide communication channels between solvers. This packaged is used by CitcomS for solver coupling.

  32. Nemesis

    21 Oct 2021 | Software: Download | Contributor(s): Michael A.G. Alvazis (primary-developer), Leif Strand (primary-developer), Brad Aagaard (primary-developer)

    Nemesis is required for PyLith v1.x and v2.x Nemesis simply installs a pair of Python interpreters ('nemesis' and 'mpinemesis') which incorporate MPI and include Pythia's "_mpi" module.

  33. Pythia

    21 Oct 2021 | Software: Download | Contributor(s): Michael A.G. Alvazis (primary-developer), Leif Strand (primary-developer), Brad Aagaard (primary-developer)

    Pythia refers to the Pyre framework and a collection of packages that interact with it, such as an interface to the ACIS solid modelling package.

  34. MAG

    21 Oct 2021 | Software: Download | Contributor(s): Gary Glatzmaier (primary-developer), Uli Christensen (primary-developer), Peter Olsen (primary-developer)

    MAG is a serial version of a rotating spherical convection/magnetoconvection/dynamo code, developed by Gary Glatzmaier and modified by Uli Christensen and Peter Olson.

  35. Cigma

    21 Oct 2021 | Software: Download | Contributor(s): Brad Aagaard (primary-developer), Luis Armendariz (primary-developer), Susan Kientz

    The CIG Model Analyzer (Cigma) is a suite of tools that facilitates the comparison of numerical models, and performs error analysis, benchmarking, and code verification.About the cover: The cover image depicts Cigma’s 3D comparison between two different PyLith solutions to the...

  36. Responsibilities of Working Groups

    12 Oct 2021 | Documents | Contributor(s): Executive Committee, Science Steering Committee

    Roles and responsibilities of Working Groups.Approved 24 August 2021.

  37. Responsibilities of the SSC

    12 Oct 2021 | Documents | Contributor(s): Executive Committee, Science Steering Commitee

    Roles and responsibilities of the Science Steering Committee.Approved 24 August 2021.

  38. Responsibilities of the EC

    12 Oct 2021 | Documents | Contributor(s): Executive Committee, Science Steering Committee

    Describes the roles and responsibilities of the Executive Committee.Approved 24 August 2021

  39. 2020 Numerical models of lower crustal flow explain Yellowstone's "tectonic parabola"

    07 Oct 2021 | Webinars | Contributor(s): Jonathan Perry-Houts

    Several hypotheses exist for the origin of the seismically active region of high topography surrounding the Yellowstone hotspot track. Among these is the idea that a dense mid-crustal sill has driven viscous lower crust away from the hotspot track, producing crustal thinning/subsidence in the...

  40. XSEDE 2021

    04 Oct 2021 | Documents | Contributor(s): CIG Staff

    XSEDE proposal and code scaling: September 2021

  41. XSEDE 2019

    04 Oct 2021 | Documents | Contributor(s): CIG Staff

    XSEDE proposal and code scaling: September 2019

  42. XSEDE 2018

    04 Oct 2021 | Documents | Contributor(s): CIG Staff

    XSEDE proposal and code scaling: January 2018

  43. XSEDE 2017 - Supplement

    04 Oct 2021 | Documents | Contributor(s): CIG Staff

    XSEDE proposal and code scaling, supplemental request: November 2017

  44. XSEDE 2017

    04 Oct 2021 | Documents | Contributor(s): CIG Staff

    XSEDE proposal and code scaling: January 2017

  45. XSEDE 2016

    04 Oct 2021 | Documents | Contributor(s): CIG Staff

    XSEDE proposal and code scaling: January 2016

  46. XSEDE 2014

    04 Oct 2021 | Documents | Contributor(s): CIG Staff

    XSEDE proposal and code scaling: September 2014

  47. BurnMan

    14 Sep 2021 | Software: Download | Contributor(s): Sanne Cottaar, Timo Heister, Robert Myhill, Ian Rose, Cayman Unterborn

    BurnMan is an open source mineral physics toolbox written in Python to determine seismic velocities for the lower mantle. BurnMan calculates the isotropic thermoelastic moduli by solving the equations-of-state for a mixture of minerals defined by the user. The user may select from a list of...

  48. 2021 CIG Community Research Highlights

    02 Aug 2021 | Documents | Contributor(s): Lorraine Hwang

    Research highlights solicited from the community for CIG IV, 

  49. 2021 CIG Developers Workshop Survey

    14 Jul 2021 | Workshops | Contributor(s): Organizing Committee

    2021 CIG Developers Workshop Survey. February 23 & 25, 2021. 

  50. 2021 CIG Developers Workshop Report

    14 Jul 2021 | Workshops | Contributor(s): Organizing Committee

    2021 CIG Developers Workshop Report. February 23 & 25, 2021.