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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...
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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...
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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...
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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...
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2021 SMOREs Introduction
02 Nov 2021 | Webinars | Contributor(s): John Naliboff
2021 SMOREs ShowcaseJohn Naliboff, New Mexico Tech
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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
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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
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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
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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
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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...
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Mantle-scale geodynamics
30 Mar 2021 | Workshops | Contributor(s): Louis Moresi
Mantle-scale geodynamics. Sept 15-17, 2008. Louis Moresi.
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3D Spherical Mantle Convection Calculations using the Yin-Yang grid
30 Mar 2021 | Workshops | Contributor(s): Paul Tackley
3D Spherical Mantle Convection Calculations using the Yin-Yang grid. July 9-11, 2008. Paul Tackley.
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Spectral Methods for Mantle Convection with 3D Viscosity Variations
30 Mar 2021 | Workshops | Contributor(s): Robert Moucha
Spectral Methods for Mantle Convection with 3D Viscosity Variations. July 9-11, 2008. Robert Moucha.
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Some aspects of phase transitions and mantle convection
30 Mar 2021 | Workshops | Contributor(s): Luce Fleitout
Some aspects of phase transitions and mantle convection. July 9-11, 2008. Luce Fleitout.
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The Role of Mantle Tractions and the Crust
30 Mar 2021 | Workshops | Contributor(s): Lucy Flesch
The Role of Mantle Tractions and the Crust. July 9-11, 2008. Lucy Flesch.
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A Recent Free Subduction Benchmark
30 Mar 2021 | Workshops | Contributor(s): Boris Kaus
A Recent Free Subduction Benchmark (or, how a simple test can cause a major headache) July 9-11, 2008. Boris Kaus.
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The Portable Extensible Toolkit for Scientific Computing
30 Mar 2021 | Workshops | Contributor(s): Matthew Knepley
The Portable Extensible Toolkit for Scientific Computing. July 9-11, 2008. Matthew Knepley.
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Next Generation Parallel Machines
30 Mar 2021 | Workshops | Contributor(s): Bill Broadley
Next Generation Parallel Machines. July 9-11, 2008. Bill Broadley.
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Multigrid Methods
23 Mar 2021 | Workshops | Contributor(s): Shijie Zhong
Multigrid Methods. July 9-11, 2008. Shijie Zhong.
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Modelling Deforming Interfaces using Level Sets
23 Mar 2021 | Workshops | Contributor(s): Hans Muhlhaus, Laurent Bourgouin, Lutz Gross
Modelling Deforming Interfaces using Level Sets. July 9-11, 2008. Hans Mühlhaus, Laurent Bourgouin and Lutz Gross.
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Modeling Lithospheric Deformation with Faults
23 Mar 2021 | Workshops | Contributor(s): Mian Liu
Modeling Lithospheric Deformation with Faults. July 9-11, 2008. Mian Liu.
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Modeling Sources of Stress and Topography
23 Mar 2021 | Workshops | Contributor(s): C. Lithgow-Bertelloni, J. Naliboff, C. Conrad, N. de Koker
Modeling Sources of Stress and Topography. July 9-11, 2008. C.Lithgow-Bertelloni, J. Naliboff, C. Conrad and N. de Koker.
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Mantle Convection, Plate Boundaries and Plasticity
23 Mar 2021 | Workshops | Contributor(s): Dave May, Louis Moresi, Hans Muhlhaus, Mirko Velic, Wendy Sharples, Dave Stegman
Mantle convection, plate boundaries and plasticity. July 9-11, 2008. Dave May, Louis Moresi, Hans Mühlhaus, Mirko Velic, Wendy Sharples, Dave Stegman.
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Magmatism, Faulting, & Morphology of Mid-Ocean Ridges
23 Mar 2021 | Workshops | Contributor(s): Garrett Ito, Mark Behn
Magmatism, Faulting, & Morphology of Mid-Ocean Ridges. July 9-11, 2008. Garrett Ito, Mark Behn.
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Lagrangian Finite Element Methods
23 Mar 2021 | Workshops | Contributor(s): Boris Kaus
Lagrangian Finite Element Methods for modelling long-term tectonic processes. July 9-11, 2008. Boris Kaus.
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Interactive Visualization Tools for Large-Scale Dynamic Simulations
23 Mar 2021 | Workshops | Contributor(s): Oliver Kreylos
Interactive Visualization Tools for Large-Scale Dynamic Simulations. July 9-11, 2008. Oliver Kreylos.
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Implementing Surface Erosion Processes in Geodynamic Models
23 Mar 2021 | Workshops | Contributor(s): Sean Willett, Frederic Herman, Jean Braun
Implementing Surface Erosion Processes in Geodynamic Models. July 9-11, 2008. Sean Willett, Frederic Herman, Jean Braun.
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Grain size-dependent viscosity convection
23 Mar 2021 | Workshops | Contributor(s): Slava Solomatov
Grain size-dependent viscosity convection. July 9-11, 2008. Slava Solomatov.
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GPlates and Mantle Convection
23 Mar 2021 | Workshops | Contributor(s): Michael Gurnis
GPlates and Mantle Convection. July 9-11, 2008. Michael Gurnis.
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Gale
23 Mar 2021 | Workshops | Contributor(s): Walter Landry
Gale.July 9-11, 2008. Walter Landry.
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Exchanger
23 Mar 2021 | Workshops | Contributor(s): Eh Tan, Eun-seo Choi, Mike Gurnis, Puru Thoutireddy, Michael Aivazis
Exchanger - coupling multiple solvers for mantle convection. July 9-11, 2008. Eh Tan, Eun-seo Choi, Mike Gurnis, Puru Thoutireddy, Michael Aivazis.
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Data Assimilation Methods in Geodynamical Models
23 Mar 2021 | Workshops | Contributor(s): Alik Ismail-Zadeh, Gerald Schubert, Igor Tsepelev, Alex Korotkii
Data Assimilation Methods in Geodynamical Models. July 9-11, 2008. Alik Ismail-Zadeh, Gerald Schubert, Igor Tsepelev & Alex Korotkii.
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Convergent margins processes
23 Mar 2021 | Workshops | Contributor(s): E. Burov
Convergent margins processes. July 9-11, 2008. E. Burov.
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Chemical Heterogeneity - Tracers and Entrainment
23 Mar 2021 | Workshops | Contributor(s): Allen K. McNamara
Chemical Heterogeneity - Tracers and Entrainment. July 9-11, 2008.Allen K. McNamara.
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Anisotropic Convection
23 Mar 2021 | Workshops | Contributor(s): Einat Lev
Anisotropic Convection. July 9-11, 2008. Einat Lev.
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Adaptive Finite Element Methods For Geodynamics
23 Mar 2021 | Workshops | Contributor(s): J. Huw Davies
Adaptive Finite Element Methods For Geodynamics. July 9-11, 2008. J. Huw Davies.
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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2016 Resolution analysis by random probing
04 Feb 2021 | Webinars | Contributor(s): Andreas Fichtner, Tristan van Leeuwen
We present a new method for resolution analysis in tomography, based on stochastic probing of the Hessian or resolution operators. Key properties of the method are (i) low algorithmic complexity and easy implementation, (ii) applicability to any tomographic technique, including full-waveform...
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2016 Statistical and computational challenges of constraining greenhouse gas budgets
04 Feb 2021 | Webinars | Contributor(s): Anna M. Michalak
Predicting future changes to the global carbon cycle (and therefore climate) and quantifying anthropogenic emissions of greenhouse gases (GHGs) both require an understanding of net GHGs emissions and uptake across a variety of spatial and temporal scales. This talk will explore some of the...
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2016 Uncertainty Quantification in Computational Models of Physical Systems
04 Feb 2021 | Webinars | Contributor(s): Habib Najm
Models of physical systems typically involve inputs/parameters that are determined from empirical measurements, and therefore exhibit a certain degree of uncertainty. Estimating the propagation of this uncertainty into computational model output predictions is crucial for purposes...
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2016 Verification, Validation, and Predictive Capability: What's What?
04 Feb 2021 | Webinars | Contributor(s): William Oberkampf
Engineering and geosciences organizations must increasingly rely on computational simulation for the design, predicted response, and performance of manmade and natural systems. Computational analysts, decision makers, and regulatory authorities who rely on simulation should have practical...
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2015 ASPECT: From Benchmarking to 3D Subduction Applications
04 Feb 2021 | Webinars | Contributor(s): Cedric Thieulot, Anne Glerum, Menno Fraters, Wim Spakman
ASPECT, the Advanced Solver for Problems in Earth's Convection, is an extensible open source, community supported code. The code is being applied to a broad range of problems in geodynamics. This talk will explore the community's efforts in benchmarking, implementation of...
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2015 An introduction to Virtual Quake
04 Feb 2021 | Webinars | Contributor(s): Kasey Schultz, John Wilson
This webinar will introduce Virtual Quake, a boundary element code that performs simulations of fault systems based on stress interactions between fault elements to understand long term statistical behavior. The webinar will cover:Downloading, installing and running Virtual...