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  1. Fault strength evolution during the seismic cycle: Insights from the laboratory

    10 Mar 2023 | Contributor(s): John Bedford

    Geophysical evidence suggests that some faults are frictionally strong, in agreement with laboratory measurements of quasi-static frictional strength (μ ≈ 0.6-0.8) for many crustal materials; whereas others studies have found that some faults are weak when compared to laboratory friction...

  2. 2020 Crustal Deformation Modeling Workshop Report

    27 Jul 2022 | Contributor(s): Brad Aagaard, Sylvain Barbot, Brittany Erickson, Matthew Knepley, Mark Simons, Charles Williams

    Workshop report

  3. 2022 Mainshock and aftershock sequence simulations in a nonplanar fault network

    19 May 2022 | Webinars | Contributor(s): So Ozawa, Ryosuke Ando

    Aftershocks seem to be located along the trace of the mainshock fault; however, due to the location error, we do not know their exact location relative to the mainshock fault. Here, we hypothesize that most aftershocks occur on small subsidiary faults instead of the mainshock fault, and they...

  4. 2022 Poroelastic Implementation in PyLith: Gateway to Multiphysics

    13 May 2022 | Webinars | Contributor(s): Robert L Walker

    Thursday May 12, 2022 @ 2P PDT Poroelastic Implementation in PyLith: Gateway to Multiphysics Robert Walker, SUNY Buffalo PyLith, a community, open-source code (https://geodynamics.org/resources/pylith) for modeling quasi-static and dynamic crustal deformation with an emphasis on earthquake...

  5. 2022 Energy transfer among flow and magnetic fields with different equatorial symmetry during the dipole reversal in a geodynamo simulation

    17 Feb 2022 | Webinars | Contributor(s): Takumi Kera, Hiroaki Matsui, Masaki Matsushima, Yuto Katoh

    The geomagnetic field has reversed its polarity, and some numerical dynamos have suggested that anti-symmetric flow with respect to the equator plays a role in reversals. Olson et al., (2004) suggested that the equatorial antisymmetric flow is temporarily strengthened, and transports a locally...

  6. 2021 SMOREs Introduction

    02 Nov 2021 | Webinars | Contributor(s): John Naliboff

    2021 SMOREs ShowcaseJohn Naliboff, New Mexico Tech

  7. 2021 Interactions between Lithospheric Instabilities and Formation of Mantle Plumes in Venus

    02 Nov 2021 | Webinars | Contributor(s): Hiva Mohammadzadeh

    2021 SMOREs ShowcaseHiva Mohammadzadeh, Los Angeles Pierce College

  8. 2021 Early Earth Influence of Radiogenic Heating on Mid-Ocean Ridge Depths and Seafloor Subsidence

    02 Nov 2021 | Webinars | Contributor(s): Keneni Godana

    2021 SMOREs ShowcaseKeneni Godana, University of Illinois at Chicago

  9. 2021 Bayesian Uncertainty Quantification of Subduction Zone Rheology from the Geoid

    02 Nov 2021 | Webinars | Contributor(s): Elena Ehrlich

    2021 SMOREs ShowcaseElena Ehrlich, North Carolina State University

  10. 2021 As Above So Below: A Simulation of the Continental Lithosphere and LLSVPs as Thermal Insulators Using ASPECT

    02 Nov 2021 | Webinars | Contributor(s): Dante Hickey

    2021 SMOREs ShowcaseDante Hickey, Reed College

  11. 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.

  12. 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...

  13. 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.

  14. 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...

  15. 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.

  16. 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...

  17. Fast Algorithms for Inverse Problems Governed by PDEs

    12 Apr 2021 | Workshops | Contributor(s): George Biros

    Fast algorithms for inverse problems governed by PDEs. September 15-17, 2008. George Biros. 

  18. Adjoint-Fueled Advances in Error Estimation for Multiscale, Multiphysics Systems

    12 Apr 2021 | Workshops | Contributor(s): Donald Estep

    Adjoint-Fueled Advances in Error Estimation for Multiscale, Multiphysics Systems. September 15-17, 2008. Donald Estep. 

  19. Non-Deterministic Approaches to Inverse Problems

    12 Apr 2021 | Workshops | Contributor(s): Malcolm Sambridge, Thomas Bodin

    Non-deterministic approaches to inverse problems. September 15-17, 2008. Malcolm Sambridge, Thomas Bodin. 

  20. Multilevel Modeling: Multigrid's Lost Twin

    12 Apr 2021 | Workshops | Contributor(s): David Moulton

    Multilevel Modeling: Multigrid’s Lost Twin. September 15-17, 2008. David Moulton. 

  21. Multiscale Finite Element Methods using Limited Global Information

    12 Apr 2021 | Workshops | Contributor(s): Yalchin Efendiev

    Multiscale finite element methods using limited global information. September 15-17, 2008. Yalchin Efendiev. 

  22. Multiscale Finite Element Methods for Heterogeneous Porous Media

    12 Apr 2021 | Workshops | Contributor(s): Todd Arbogast

    Multiscale Finite Element Methods for Heterogeneous Porous Media. September 15-17, 2008. Todd Arbogast.  

  23. Problems in Solid Earth Deformation: Crust and Upper Mantle

    12 Apr 2021 | Workshops | Contributor(s): Yuri Fialko

    Problems in Solid Earth Deformation: Crust and Upper Mantle. September 15-17, 2008. Yuri Fialko. 

  24. Constraining the Physics Governing Collective Behavior of Earthquakes and Faults through Numerical Modeling and Observations

    12 Apr 2021 | Workshops | Contributor(s): Yehuda Ben-Zion

    Constraining the physics governing collective behavior of earthquakes and faults through numerical modeling and observations. September 15-17, 2008. Yehuda Ben-Zion. 

  25. Current challenges in computational earthquake dynamics

    12 Apr 2021 | Workshops | Contributor(s): Jean-Paul Ampuero

    Current challenges in computational earthquake dynamics. September 15-17, 2008. Jean-Paul Ampuero. 

  26. Robust and Flexible Newton-Krylov based Solution Methods for Nonlinear Coupled Multiphysics Systems

    12 Apr 2021 | Workshops | Contributor(s): John Shadid

    Robust and Flexible Newton-Krylov based Solution Methods for Nonlinear Coupled Multiphysics Systems. September 15-17, 2008. John Shadid. 

  27. Multi-physics/Multi-Scale Methods I: Methods for Multi-physics Coupled Solvers

    12 Apr 2021 | Workshops | Contributor(s): Daniel Reynolds

    Multi-physics/Multi-Scale Methods I: Methods for Multi-physics Coupled Solvers. September 15-17, 2008. Daniel Reynolds. 

  28. Thermodynamics of Mantle Systems

    12 Apr 2021 | Workshops | Contributor(s): Paula Smith, Laura Baker Hebert, Paul Asimow, Mike Gurnis

    Thermodynamics of mantle systems. September 15-17, 2008. Paula Smith, Laura Baker Hebert, Paul Asimow, Mike Gurnis.

  29. Reservoir Simulation Magma Dynamics

    12 Apr 2021 | Workshops | Contributor(s): Marc Hesse

    Reservoir Simulation Magma Dynamics. September 15-17, 2008. Marc Hesse. 

  30. Limits to Nonlinear Inversion

    02 Apr 2021 | Workshops | Contributor(s): Klaus Mosegaard

    Limits to Nonlinear Inversion. September 15-17, 2008. Klaus Mosegaard. 

  31. Robust and Flexible Newton-Krylov based Solution Methods for Nonlinear Coupled Multiphysics Systems

    02 Apr 2021 | Workshops | Contributor(s): John Shadid, Paul T. Lin, Roger P. Pawlowski, Ray S. Tumninaro, Luis Chacon

    Robust and Flexible Newton-Krylov based Solution Methods for Nonlinear Coupled Multiphysics Systems. September 15-17, 2008. John N. Shadid. 

  32. Ubiquitous Interactive Visualization of 3D Mantle Convection

    31 Mar 2021 | Workshops | Contributor(s): David Yuen

    Ubiquitous Interactive Visualization of 3D Mantle Convection. September 15-17, 2008. David Yuen. 

  33. PyLith 1.3: A Finite-Element Code for Modeling Quasi-Static and Dynamic Crustal Deformation

    31 Mar 2021 | Workshops | Contributor(s): Brad Aagaard, Charles Williams, Matthew Knepley, Leif Strand, Sue Kientz

    PyLith 1.3: A Finite-Element Code for Modeling Quasi-Static and Dynamic Crustal Deformation. September 15-17, 2008. Brad Aagaard. 

  34. Parallel Adaptive Mantle Convection Simulation

    31 Mar 2021 | Workshops | Contributor(s): Carsten Burstedde, Omar Ghattas, Mike Gurnis, Georg Stadler, Eh Tan, Tiankai Tu, Lucas C. Wilcox, Shijie Zhong

    Parallel Adaptive Mantle Convection Simulation. September 15-17, 2008. Carsten Burstedde. 

  35. New Computational Approach to Nonplanar Elastodynamic Ruptures

    31 Mar 2021 | Workshops | Contributor(s): Ethan T. Coon, Bruce E. Shaw, Marc Spiegelman

    New Computational Approach to Nonplanar Elastodynamic Ruptures. September 15-17, 2008. Ethan T. Coon. 

  36. Multilevel Approach for signal restoration problems with Toeplitz matrices

    31 Mar 2021 | Workshops | Contributor(s): Malena I. Español, Misha E. Kilmer

    Multilevel Approach for signal restoration problems with Toeplitz matrices. September 17-18, 2008. Malena I. Español. 

  37. Lithospheric Modelling: Research Directions at Simula

    31 Mar 2021 | Workshops | Contributor(s): Stuart R. Clark, Are Magnus Bruaset

    Lithospheric Modelling: Research Directions at Simula. September 15-17, 2008. Stuart R. Clark. 

  38. Gale: Large Scale Tectonics Modeling With Free Software

    31 Mar 2021 | Workshops | Contributor(s): Walter Landry, L. Hodkinson, S. Kientz

    Gale: Large Scale Tectonics Modeling With Free Software. September 15-17, 2008. Walter Landry. 

  39. Flexible Multi-Physics Solvers for Magma Dynamics

    31 Mar 2021 | Workshops | Contributor(s): Marc Spiegelman, Gideon Simpson, Michael Weinstein

    Flexible Multi-Physics Solvers for Magma Dynamics. September 15-17, 2008. Marc Spiegelman. 

  40. Finite Element Meshing of the SCEC

    31 Mar 2021 | Workshops | Contributor(s): Carl W. Gable, Brad H. Hager, Jingning Lu, Charles A. Williams

    Finite Element Meshing of the SCEC. September 15-17, 2008. Carl W. Gable. 

  41. CitcomS: Compressible Mantle Convection

    31 Mar 2021 | Workshops | Contributor(s): Eh Tan, M. Gurnis, S. Kientz

    CitcomS: Compressible Mantle Convection. September 15-17, 2008. Eh Tan. 

  42. CIG Software for the Geophysics Community

    31 Mar 2021 | Workshops | Contributor(s): Walter Landry, Eh Tan, Leif Strand, Luis Armendariz, Michael Gurnis, Wei Mi, Michael Aivazis, Brad Aagaard, Matthew Knepley, Marc Spiegelman, Charles Williams, Luke Hodkinson

    CIG Software for the Geophysics Community. September 15-17, 2008. Walter Landry. 

  43. Problems in magma dynamics (and a few solutions)

    30 Mar 2021 | Workshops | Contributor(s): Richard Katz

    Problems in magma dynamics (and a few solutions) Sept 15-17, 2008. Richard Katz. 

  44. Adaptive Mesh Refinement for Geodynamics Applications

    30 Mar 2021 | Workshops | Contributor(s): Wolfgang Bangerth

    Adaptive Mesh Refinement for Geodynamics Applications. Sept 15-17, 2008. Wolfgang Bangerth. 

  45. Multigrid & Optimal Solvers

    30 Mar 2021 | Workshops | Contributor(s): Ray Tuminaro

    Multigrid & Optimal Solvers. Sept 15-17, 2008. Ray Tuminaro. 

  46. Mantle Convection: Current Status and Future Challenges

    30 Mar 2021 | Workshops | Contributor(s): Shijie Zhong

    Mantle Convection: Current Status and Future Challenges. Sept 15-17, 2008. Shijie Zhong.

  47. Preconditioners for Variable Viscosity Stokes Flow

    30 Mar 2021 | Workshops | Contributor(s): Dave May

    Preconditioners for Variable Viscosity Stokes Flow. Sept 15-17, 2008. Dave May.

  48. 2019 The Release of the GEM Global Active Faults Database and Global Seismic Hazard Map

    04 Feb 2021 | Webinars | Contributor(s): Richard Styron

    In late 2018, the Global Earthquake Model Foundation (GEM) released the initial version of several major products relating to seismic hazard and risk, including the Global Seismic Hazard Map, the Global Seismic Risk Map, and the Global Active Faults Database. Though these are intended primarily...

  49. 2019 HeFESTO: A tool for exploring Earth's physical properties and their effects on mantle dynamics

    04 Feb 2021 | Webinars | Contributor(s): Carolina Lithgow-Bertelloni, Lars Stixrude

    The minerals that exist at the extreme pressure and temperature conditions of the mantle and their physical properties determine the dynamics of the mantle. Both are also critical for comparison with seismic observations that put constraints on our knowledge of mantle structure and...

  50. 2019 Introduction to Quagmire

    04 Feb 2021 | Webinars | Contributor(s): Louis Moresi, Ben Mather, Romain Beucher

    Quagmire is an open source, parallel python module for modelling surface processes and landscape evolution. It comes from the Underworld geodynamics group and has many common design patterns to Underworld. For starters, this is not an out-of-the-box landscape evolution code — it is instead...