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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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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
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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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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.
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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...
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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.
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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...
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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.
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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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CIG-Magma Workshop Schedule
01 Apr 2021 | Workshops | Contributor(s): Staff
CIG-Magma Workshop Schedule. August 18-19, 2006.
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Convolutional Neural Network Detects Strombolian Eruptions at Mount Erebus, Antarctica
25 Mar 2021 | Workshops | Contributor(s): Gabriele Morra, Taylor Privat, Brian Dye, Leila Honarbakhsh
Convolutional Neural Network Detects Strombolian Eruptions at Mount Erebus, Antarctica. September 18-19, 2019. Gabriele Morra, Taylor Privat, Brian Dye, Leila Honarbakhsh.
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Image-Based Processing Methods in Develocorder Films Using Machine Learning: Application to the Rangely Earthquake Control Experiment
25 Mar 2021 | Workshops | Contributor(s): Kaiwen Wang, Weiqiang Zhu, William L. Ellsworth, Gregory C. Beroza
Image-Based Processing Methods in Develocorder Films Using Machine Learning: Application to the Rangely Earthquake Control Experiment. September 18-19, 2019. Kaiwen Wang, Weiqiang Zhu, William L. Ellsworth, Gregory C. Beroza.
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Use Cases for Legacy Seismic Data
25 Mar 2021 | Workshops | Contributor(s): Tim Ahern
Use Cases for Legacy Seismic Data. September 18-19, 2019. Tim Ahern.
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A Strawman for Legacy Data Metadata From Using International Input
25 Mar 2021 | Workshops | Contributor(s): Tim Ahern
A Strawman for Legacy Data Metatdata From Using International Input. September 18-19, 2019. Tim Ahern.
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MSU's Analog Digitization Challenges
25 Mar 2021 | Workshops | Contributor(s): Daniel Burk, Kevin Mackey, Kaitlyn Burkhart, Viktor
MSU's Analog Digitization Challenges. September 18-19, 2019. Daniel Burk, Kevin Mackey, Kaitlyn Burkhart, Viktor.
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Metadata Collected by Legacy Data Rescue Projects
25 Mar 2021 | Workshops | Contributor(s): Tim Ahern
Metadata Collected by Legacy Data Rescue Projects. September 18-19, 2019. Tim Ahern.
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Legacy Data Holdings Held By The U.S. Geological Survey in Colorado
25 Mar 2021 | Workshops | Contributor(s): Jim Dewey
Legacy Data Holdings Held By The U.S. Geological Survey in Colorado. September 18-19, 2019. Jim Dewey.
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The Mexican Seismogram Library OnLine: preservation and dissemination of historical data on seismograms 1904-2015
25 Mar 2021 | Workshops | Contributor(s): Xyoli Pérez-Campos, Saúl Armendáriz Sánchez, Víctor H. Espíndola, Jesús A. Pérez, Minerva Castro Escamilla, Caridad Cárdenas Monroy, Perla Sosa Zaragoza, Luis Manuel Casiano Casiano
The Mexican Seismogram Library OnLine: preservation and dissemination of historical data on seismograms 1904-2015. September 18-19, 2019. Xyoli Pérez-Campos, Saúl Armendáriz Sánchez, Víctor H. Espíndola, Jesús A. Pérez,...
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Geophysical Data National Archive of IGN-Spain
25 Mar 2021 | Workshops | Contributor(s): Josep Batlló, Jose Manuel Tordesillas, Marina López-Muga, Irene Benayas
Geophysical Data National Archive of IGN-Spain. September 18-19, 2019. Josep Batlló, Jose Manuel Tordesillas, Marina López-Muga, Irene Benayas.
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Preserving analogue seismograms of regional networks and other documents. Experience at the Institut Cartogràfic i Geològic de Catalunya
25 Mar 2021 | Workshops | Contributor(s): Josep Batlló, Jose Antonio Jara, Maria Teresa Merino, Germán Solé
Preserving analogue seismograms of regional networks and other documents. Experience at the Institut Cartogràfic i Geològic de Catalunya. September 18-19, 2019. Josep Batlló, Jose Antonio Jara, Maria Teresa Merino, Germán Solé.
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Dealing with old seismic data: something like a SWOT
25 Mar 2021 | Workshops | Contributor(s): Josep Batlló
Dealing with old seismic data: something like a SWOT. September 18-19, 2019. Josep Batlló.
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A Very Brief Tour of the U.S. Underground Nuclear Explosion Legacy Data
25 Mar 2021 | Workshops | Contributor(s): Garrett Euler
A Very Brief Tour of the U.S. Underground Nuclear Explosion Legacy Data. September 18-19, 2019. Garrett Euler.
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Archival efforts at AVO and AEC
25 Mar 2021 | Workshops | Contributor(s): Jim Dixon
Archival efforts at AVO and AEC. September 18-19, 2019. Jim Dixon.
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One million paper seismograms from New Zealand, Antarctica, and the Pacific
25 Mar 2021 | Workshops | Contributor(s): Paul Viskovic
One million paper seismograms from New Zealand, Antarctica, and the Pacific. September 18-19, 2019. Paul Viskovic.
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Calibration Analysis of ALQ
25 Mar 2021 | Workshops | Contributor(s): Adam Ringler
Calibration Analysis of ALQ. September 18-19, 2019. Adam Ringler.
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Relative Time Corrections For Digitized Analog Records
25 Mar 2021 | Workshops | Contributor(s): Thomas Lee, Miaki Ishii
Relative Time Corrections For Digitized Analog Records. September 18-19, 2019. Thomas A. Lee, Miaki Ishii.
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Historical Seismogram Analysis
25 Mar 2021 | Workshops | Contributor(s): Alberto Michelini, Matteo Quintiliani, Silvia Filosa
Historical Seismogram Analysis. September 18-19, 2019. Alberto Michelini, Matteo Quintiliani, Silvia Filosa.
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SKATE: A web-based seismogram digitization tool
25 Mar 2021 | Workshops | Contributor(s): Andrew Barlett
SKATE: A web-based seismogram digitization tool. September 18-19, 2019. Andrew Barlett.
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Restoration and Recovery of Historical Seismic Records from the Former Soviet Union
25 Mar 2021 | Workshops | Contributor(s): Daniel Burk, Kevin Mackey, Kaitlyn Burkhart, Ken Abrams, Inna Sokolova
Restoration and Recovery of Historical Seismic Records from the Former Soviet Union. September 18-19, 0219. Daniel Burk, Kevin Mackey, Kaitlyn Burkhart, Ken Abrams, Inna Sokolova.
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A New Seismic Catalog in the Caucasus Using Digitized Legacy Data
25 Mar 2021 | Workshops | Contributor(s): Ana Aguiar, Rengin Gök, Tea Godoladze
A New Seismic Catalog in the Caucasus Using Digitized Legacy Data. September 18-19, 2019. Ana Agular, Regin Gök, Tea Godoladze.
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Importance of Legacy Data for National Security
24 Mar 2021 | Workshops | Contributor(s): Brian Young
Importance of Legacy Data for National Security. September 18-19, 2019. Brian Young.
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Work done, and work still needed, to preserve and make usable the analog seismograms of nuclear test explosions conducted in all environments
24 Mar 2021 | Workshops | Contributor(s): Paul Richards
Work done, and work still needed, to preserve and make usable the analog seismograms of nuclear test explosions conducted in all environments. September 18-19, 2019. Paul Richards.
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Analysis of unusual earthquakes using 'legacy' data
24 Mar 2021 | Workshops | Contributor(s): Meredith Nettles, John Wilding, Göran Ekström
Analysis of unusual earthquakes using 'legacy' data. September 18-19, 2019. Meredith Nettles, John Wilding, Göran Ekström.
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Waveforms and Beyond: Analysis of Seismogram, Phase and Intensity Data for M 6-7 Pre-digital Era Earthquakes
24 Mar 2021 | Workshops | Contributor(s): Diane Doser
Waveforms and Beyond: Analysis of Seismogram, Phase and Intensity Data for M 6-7 Pre-digital Era Earthquakes. September 18-19, 2019. Diane Doser.
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1907, 1915, 1941: Examples of the Critical Value of Historical Seismograms for the Study of Subduction Processes
24 Mar 2021 | Workshops | Contributor(s): Emile Okal
1907, 1915, 1941: Examples of the Critical Value of Historical Seismograms for the Study of Subduction Processes. September 18-19, 2019. Emile Okal.
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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...