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  1. 2006challengesandopportunitiesattheinterfacesofscientificcomputingandcomputationalgeodyn x
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  1. TauP

    29 Feb 2024 | Software: Download | Contributor(s): H. Philip Crotwell (primary-developer), Thomas J. Owens

    The TauP Toolkit is a seismic travel time calculator. In addition to travel times, it can calculate derivative information such as ray paths through the earth, pierce and turning points. It handles many types of velocity models and can calculate times for virtually any seismic phase with a...

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

    10 Mar 2023 | Webinars | 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...

  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. 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...

  12. 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...

  13. 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...

  14. 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...

  15. 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.

  16. 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...

  17. 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...

  18. 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...

  19. 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...

  20. 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...

  21. 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.

  22. 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.

  23. 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

  24. 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...

  25. 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...

  26. Computational Science Roundtable Discussion

    01 Apr 2021 | Workshops | Contributor(s): Staff

    Computational Science Roundtable Discussion. October 16-18, 2006. 

  27. CIG Bylaws 2018

    30 Mar 2021 | Documents | Contributor(s): Staff

    Bylaws of Computational Infrastructure for Geodynamics (CIG). As amended by the Electorate, June 30, 2018. 

  28. Spectral-Element and Adjoint Methods in Seismology

    11 Feb 2021 | Workshops | Contributor(s): Jeroen Tromp

    Spectral-Element and Adjoint Methods in Seismology. October 16-18, 2006. Jeroen Tromp. 

  29. An Architecture for Composing Solvers

    11 Feb 2021 | Workshops | Contributor(s): Barry Smith

    An Architecture for Composing Solvers - Case study of PETSc. October 16-18, 2006. Barry Smith. 

  30. Going Beyond an Elastic Halfspace

    11 Feb 2021 | Workshops | Contributor(s): Mark Simons, Eric Hetland, Mark Turner

    Going Beyond an Elastic Halfspace - CIG Short-Term Crustal Dynamics. October 16-18, 2006. Mark Simons, Eric Hetland, and Mark Turner. 

  31. Plumbing the Depths: Computational Challenges for Magma Dynamics in Earth Sciences

    11 Feb 2021 | Workshops | Contributor(s): Marc Spiegelman, Richard Katz

    Plumbing the Depths: Computational Challenges for Magma Dynamics in Earth Sciences. October 16-18, 2006. Marc Spiegelman, Richard Katz. 

  32. An Overview of the Application of Newton-Krylov based Solution Methods for Nonlinear Multiple-time-scale PDE Systems

    11 Feb 2021 | Workshops | Contributor(s): John Shahid

    An Overview of the Application of Newton-Krylov based Solution Methods for Nonlinear Multiple-time-scale PDE Systems. October 16-18, 2006. John Shahid . 

  33. Scalable Techniques for Scientific Visualization

    11 Feb 2021 | Workshops | Contributor(s): Claudio Silva

    Scalable Techniques for Scientific Visualization. October 16-18, 2006. Claudio Silva. 

  34. Modeling Geophysical Mass Flows – Mesh(Free), Model and Parameter Adaptivity

    11 Feb 2021 | Workshops | Contributor(s): Abani Patra

    Modeling Geophysical Mass Flows – Mesh(Free), Model and Parameter Adaptivity. October 16-18, 2006. Abani Patra. 

  35. Improving Scalability of Sparse Direct Linear Solvers

    11 Feb 2021 | Workshops | Contributor(s): X. Sherry Li

    Improving Scalability of Sparse Direct Linear Solvers. October 16-18, 2006. X. Sherry Li. 

  36. Scientific and computational challenges in simulating fluid-rock interaction

    11 Feb 2021 | Workshops | Contributor(s): Mousumi Roy

    Scientific and computational challenges in simulating fluid-rock interaction and its role in the long-term tectonics of continental lithosphere. October 16-18, 2006.Mousumi Roy. 

  37. Grid Refinement and Parallel computing for mantle convection and Thermochemical Convection

    11 Feb 2021 | Workshops | Contributor(s): Scott King, Peter van Keken

    Grid Refinement and Parallel computing for mantle convection and Thermochemical Convection. October 16-18, 2006. Scott King, Peter van Keken.

  38. Besides Teraflops: Getting More from Big Iron

    11 Feb 2021 | Workshops | Contributor(s): Tiankai Tu

    Besides Teraflops: Getting More from Big Iron. October 16-18, 2006. Tiankai Tu.

  39. CIG Business Meeting 2007 Presentations

    07 Feb 2021 | Documents | Contributor(s): Staff

    PDF presentations given at the CIG Business Meeting on December 11, 2007, in San Francisco during the annual AGU Meeting.

  40. CIG Business Meeting 2009 Presentations

    07 Feb 2021 | Documents | Contributor(s): Staff

    CIG Business Meeting 2009 Presentation.Movie Files and Other Supporting Material.Ehler.

  41. CIG Business Meeting 2008 Presentations

    07 Feb 2021 | Documents | Contributor(s): Staff

    CIG Business Meeting 2008 Presentations.December 16, 2008.CIG Business Meeting: The Future of CIG, presented by Marc Spiegelmann (Columbia), EC Chair.CIG-II, presented by Louise Kellogg (UC Davis), SSC Chair.

  42. SSC May 2008 Meeting Presentations

    07 Feb 2021 | Documents | Contributor(s): Staff

    Presentations from the SSC Meeting held at CIG on May 29-30, 2008.

  43. Expanding Computational Infrastructure: The First 5 Years of CIG

    07 Feb 2021 | Documents | Contributor(s): Staff

    Expanding Computational Infrastructure: The First 5 Years of CIG.Parts 1 & 2.

  44. 2013 CIG Strategic Plan & Annual Report

    07 Feb 2021 | Documents | Contributor(s): Staff

    2013-2014 Strategic Plan & Annual Report.June 2013.

  45. 2009 CIG Annual Report

    07 Feb 2021 | Documents | Contributor(s): Staff

    Annual Report:Aug. 31, 2009. 

  46. 2007 CIG Five-Year Strategic Plan

    07 Feb 2021 | Documents | Contributor(s): Staff

    Five-Year Strategic Plan: Sept. 1, 2007 to Aug. 31, 2012.

  47. 2005 CIG Five-Year Strategic Plan

    07 Feb 2021 | Documents | Contributor(s): Staff

    Five-year Strategic Plan: Sept. 1, 2005 to Aug. 31, 2010.Submitted July 26, 2005.

  48. 2005 Executive Committee Meeting Minutes

    07 Feb 2021 | Documents | Contributor(s): Staff

    Minutes of the Executive Committee Meeting.May 2, 2005, Berkeley, CA.

  49. Advancing Solid Earth System Science Through High-Performance Computing

    07 Feb 2021 | Documents | Contributor(s): Staff

    Advancing Solid Earth System Science Through High-Performance Computing.June 2014.

  50. 2014 Positioning CIG

    05 Feb 2021 | Documents | Contributor(s): Staff

    Positioning CIG.September 2014.