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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. Rupture process of the 2008 Mw 8.0 Wenchuan Earthquake

    01 Apr 2021 | Workshops | Contributor(s): Guangfu Shao, Chen Ji, Zhong Lu, Ken Hudnut, Jing Liu-Zeng

    Rupture process of the 2008 Mw 8.0 Wenchuan Earthquake. June 23-27, 2008. Guangfu Shao. 

  18. Simple Elastic Dislocation Models for Interseismic Deformation in Subduction Zones

    01 Apr 2021 | Workshops | Contributor(s): Ravi V.S. Kanda, Mark Simons

    Simple Elastic Dislocation Models for Interseismic Deformation in Subduction Zones. June 23-27, 2008. Ravi V. S. Kanda. 

  19. Interseismic Deformation Associated with Three-Dimensional Faults in the Greater Los Angeles Region, California

    01 Apr 2021 | Workshops | Contributor(s): Scott T. Marshall, Michele L. Cooke, Susan E. Owen

    Interseismic Deformation Associated with Three-Dimensional Faults in the Greater Los Angeles Region, California. June 23-27, 2008. Scott T. Marshall. 

  20. Do repeating earthquakes at Parkfield talk to each other?

    01 Apr 2021 | Workshops | Contributor(s): Kate Huihsuan Chen, Roland Bürgmann, Robert M. Nadeau

    Do repeating earthquakes at Parkfield talk to each other?. June 23-27, 2008. Kate Huihsuan Chen. 

  21. Crustal deformation and block kinematics of Taiwan

    01 Apr 2021 | Workshops | Contributor(s): Ruey-Juin Rau, Kuo-En Ching, Jian-Cheng Lee, Jyr-Ching Hu

    Crustal deformation and block kinematics of Taiwan. June 23-27, 2008. Ruey-Juin Rau. 

  22. A Bayesian Approach for Inter-plate Coupling Models in Subduction Zones

    01 Apr 2021 | Workshops | Contributor(s): Fransisco Ortega, Mark Simons

    A Bayesian Approach for Inter-plate Coupling Models in Subduction Zones. June 23-27, 2008. Fransisco Ortega. 

  23. Heterogeneities and complexity in earthquake dynamics

    27 Feb 2021 | Workshops | Contributor(s): Jean Paul Ampuero

    Heterogeneities and complexity in earthquake dynamics. June 23-27, 2008. Jean Paul Ampuero. 

  24. What gives in the lower crust? Evidence from post-loading deformation and exhumed fault zones

    27 Feb 2021 | Workshops | Contributor(s): Roland Bürgmann

    What gives in the lower crust? Evidence from post-loading deformation and exhumed fault zones. June 23-27, 2008. Roland Bürgmann. 

  25. The Growing Wealth of Aseismic Deformation Data: What's a Modeler to Model?

    27 Feb 2021 | Workshops | Contributor(s): Evelyn Roeloffs

    The Growing Wealth of Aseismic Deformation Data: What's a Modeler to Model? June 23-27, 2008. Evelyn Roeloffs. 

  26. Shaking up Faults: Insights from the Lab on Earthquake Triggering

    27 Feb 2021 | Workshops | Contributor(s): Heather Savage

    Shaking up Faults: Insights from the Lab on Earthquake Triggering. June 23-27, 2008. Heather Savage. 

  27. Rheologic contrast between the crust and mantle: Insights from the lab and analyses of naturally deformed rocks

    27 Feb 2021 | Workshops | Contributor(s): Greg Hirth

    Rheologic contrast between the crust and mantle: Insights from the lab and analyses of naturally deformed rocks. June 23-27, 2008. Greg Hirth. 

  28. Report on semi-analytic code compilation effort

    27 Feb 2021 | Workshops | Contributor(s): Rowena Lohman

    Report on semi-analytic code compilation effort. June 23-27, 2008. Rowena Lohman. 

  29. Rapid Regional-Scale Earthquake Simulators

    27 Feb 2021 | Workshops | Contributor(s): Keith Richards-Dinger

    Rapid Regional-Scale Earthquake Simulators. June 23-27, 2008. Keith Richards-Dinger.

  30. PyLith

    27 Feb 2021 | Workshops | Contributor(s): Brad Aagaard

    PyLith. June 23-27, 2008. Brad Aagaard. 

  31. Probabilistic seismic hazard in the San Francisco Bay area based on physical models

    27 Feb 2021 | Workshops | Contributor(s): Fred Pollitz, David Schwartz

    Probabilistic seismic hazard in the San Francisco Bay area based on physical models. June 23-27, 2008. Fred Pollitz, David Schwartz.

  32. Modeling the post‐rifting deformation on the Krafla volcanic system

    27 Feb 2021 | Workshops | Contributor(s): Christopher DiCaprio, Mark Simons

    Modeling the post‐rifting deformation on the Krafla volcanic system. June 23-27, 2008. Christopher DiCaprio, Mark Simons. 

  33. Mesh Generation for Geological Applications

    27 Feb 2021 | Workshops | Contributor(s): Carl Gable

    Mesh Generation for Geological Applications. June 23-27, 2008. Carl Gable. 

  34. GeoFEST Progress

    27 Feb 2021 | Workshops | Contributor(s): Jay Parker, Gregory Lyzenga, Charles Norton, Margaret Glasscoe

    GeoFEST Progress. June 23-27, 2008. Jay Parker, Gregory Lyzenga, Charles Norton, Margaret Glasscoe.  

  35. Generating Green's Functions with Pylith

    26 Feb 2021 | Workshops | Contributor(s): Rowena Lohman

    Generating Green’s Functions with Pylith. June 23-27, 2008. Rowena Lohman.  

  36. General Unstructured Mesh Adaptation: Its Strengths and Weaknesses

    26 Feb 2021 | Workshops | Contributor(s): M.S. Shephard

    General Unstructured Mesh Adaptation: Its Strengths and Weaknesses. June 23-27, 2008. M.S. Shephard. 

  37. Gale

    26 Feb 2021 | Workshops | Contributor(s): Walter Landry

    Gale. June 23-27, 2008. Walter Landry. 

  38. Development of Variational Data Assimilation for Active Tectonics Studies

    26 Feb 2021 | Workshops | Contributor(s): Kush Tandon, Gary Egbert

    Development of Variational Data Assimilation for Active Tectonics Studies. June 23-27, 2008. Kush Tandon, Gary Egbert.

  39. CUBIT: Geometry and Mesh Generation Toolkit

    26 Feb 2021 | Workshops | Contributor(s): Emanuele Casarotti

    CUBIT: Geometry and Mesh Generation Toolkit. June 23-27, 2008. Emanuele Casarotti. 

  40. Crustal deformation in Iceland

    26 Feb 2021 | Workshops | Contributor(s): Freysteinn Sigmundsson

    Crustal deformation in Iceland. June 23-27, 2008. Freysteinn Sigmundsson.  

  41. Community Benchmarks

    26 Feb 2021 | Workshops | Contributor(s): Charles WIlliams

    Community Benchmarks. June 23-27, 2008. Charles Williams. 

  42. Workshop Final Report: Numerical Modeling of Crustal Deformation Associated with Earthquake Faulting

    26 Feb 2021 | Workshops | Contributor(s): Andrew Freed, Brad Aagaard, Carl Gable, Mark Simons

    Workshop Final Report: Numerical Modeling of Crustal Deformation Associated with Earthquake Faulting. June 23-27, 2008. Andrew Freed, Brad Aagaard, Carl Gable, Mark Simons.   

  43. 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...

  44. 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...

  45. 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...

  46. 2018 Introduction to thermal-mechanical lithosphere models with surface processes

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

    Surface processes including erosion, transport and sedimentation have the potential to strongly influence crustal and lithospheric deformation whether passively, through isostatic response, or more actively by affecting the thermal structure, the potential energy field, and / or the local stress...

  47. 2018 Pythonic Geodynamics

    04 Feb 2021 | Webinars | Contributor(s): Gabriele Morra, David A. Yuen, Sang-Mook Lee

    Students and young researchers who want to learn to use computational tools for geodynamic modeling have the option to choose among a wide range of numerical tools. I will show how Python and its libraries represent an easy-to-use platform for self-learning, with performance close to compiled...

  48. 2017 Geodynamic modeling with staggered finite differences and marker in cell: theory, teaching and examples

    04 Feb 2021 | Webinars | Contributor(s): Taras Gerya

    Numerical modeling of geodynamic processes is an essential approach in both science and industry with ever- growing demand and high efficiency/cost ratio. Current trend in geodynamic modeling is to develop universal approaches with potentially unlimited number of applications. One simple...

  49. 2017 Introduction to the spectral-infinite-element method

    04 Feb 2021 | Webinars | Contributor(s): Hom Nath Gharti, Jeroen Tromp

    The governing equations for the elastic-gravitational deformation of an Earth model involve a perturbed gravitational potential. The gravitational potential is governed by Poisson’s equation inside the Earth and by Laplace’s equation in the rest of space. The infinite domain...

  50. 2016 Software Practices in Computational Science Communities – an Overview

    04 Feb 2021 | Webinars | Contributor(s): Anshu Dubey

    Scientific code developers typically adopt software processes derived from the mainstream (non-scientific) community when continuing without them becomes impractical. However, many software best practices need modification and/or customization, partly because the codes are used for...