Ylona van Dinther

Utrecht University

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Taras Gerya

ETH Zurich

Iris van Zelst

Deutsches Zentrum für Luft- und Raumfahrt e. V. (DLR)

Alice‐Agnes Gabriel

University of California, San Diego

Luca Dal Zilio

Earth Observatory of Singapore

Elizabeth H. Madden

Ludwig-Maximilians-Universität München

Fabio Corbi

Institute of Environmental Geology and Geoengineering

L. A. Dalguer

Swiss Federal Nuclear Safety Inspectorate

Thomas Ulrich

Ludwig-Maximilians-Universität München

Casper Pranger

Ludwig-Maximilians-Universität München

Claudio Faccenna

Roma Tre University

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ETH Zurich

Utrecht University

Centre National de la Recherche Scientifique

Stanford University

Ludwig-Maximilians-Universität München

Roma Tre University

California Institute of Technology

The University of Tokyo

Istituto Nazionale di Geofisica e Vulcanologia

LMU Klinikum

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SeisSol dynamic rupture model setup of the Mw 7.5 Palu earthquake scenario published in Ulrich et al. (2019)

Zenodo (CERN European Organization for Nuclear Research) (2019)

Thomas Ulrich Stefan Vater Elizabeth H. Madden Jörn Behrens Ylona van Dinther

All data required to run the dynamic rupture model of the Palu earthquake presented in: Ulrich, T., Vater, S., Madden, E. H., Behrens, J., van Dinther, Y., van Zelst, I., Fielding, E. J., Liang, C. & Gabriel, A. A. (2019). Coupled, Physics-based Modeling Reveals Earthquake Displacements are Critical to the 2018 Palu, Sulawesi Tsunami. doi: 10.31223/osf.io/3bwqa. A detailed readme file summarizing the data and data formats is also provided.

10.5281/zenodo.3234664

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3D Linked Subduction, Dynamic Rupture, Tsunami, and Inundation Modeling: Dynamic Effects of Supershear and Tsunami Earthquakes, Hypocenter Location, and Shallow Fault Slip

Frontiers in Earth Science (2021)

Sara Aniko Wirp Alice‐Agnes Gabriel Maximilian Schmeller Elizabeth H. Madden Iris van Zelst

Physics-based dynamic rupture models capture the variability of earthquake slip in space and time and can account for the structural complexity inherent to subduction zones. Here we link tsunami generation, propagation, and coastal inundation with 3D earthquake dynamic rupture (DR) models initialized using a 2D seismo-thermo-mechanical geodynamic (SC) model simulating both subduction dynamics and seismic cycles. We analyze a total of 15 subduction-initialized 3D dynamic rupture-tsunami scenarios in which the tsunami source arises from the time-dependent co-seismic seafloor displacements with flat bathymetry and inundation on a linearly sloping beach. We first vary the location of the hypocenter to generate 12 distinct unilateral and bilateral propagating earthquake scenarios. Large-scale fault topography leads to localized up- or downdip propagating supershear rupture depending on hypocentral depth. Albeit dynamic earthquakes differ (rupture speed, peak slip-rate, fault slip, bimaterial effects), the effects of hypocentral depth (25–40 km) on tsunami dynamics are negligible. Lateral hypocenter variations lead to small effects such as delayed wave arrival of up to 100 s and differences in tsunami amplitude of up to 0.4 m at the coast. We next analyse inundation on a coastline with complex topo-bathymetry which increases tsunami wave amplitudes up to ≈1.5 m compared to a linearly sloping beach. Motivated by structural heterogeneity in subduction zones, we analyse a scenario with increased Poisson's ratio of ν = 0.3 which results in close to double the amount of shallow fault slip, ≈1.5 m higher vertical seafloor displacement, and a difference of up to ≈1.5 m in coastal tsunami amplitudes. Lastly, we model a dynamic rupture “tsunami earthquake” with low rupture velocity and low peak slip rates but twice as high tsunami potential energy. We triple fracture energy which again doubles the amount of shallow fault slip, but also causes a 2 m higher vertical seafloor uplift and the highest coastal tsunami amplitude (≈7.5 m) and inundation area compared to all other scenarios. Our mechanically consistent analysis for a generic megathrust setting can provide building blocks toward using physics-based dynamic rupture modeling in Probabilistic Tsunami Hazard Analysis.

Hypocenter

Seafloor Spreading

Tsunami earthquake

Earthquake rupture

10.3389/feart.2021.626844

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What controls the bimodal seismicity of large Himalayan earthquakes

AGUFM (2017)

Luca Dal Zilio T. V. Gerya Ylona van Dinther Jean‐Philippe Avouac

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Model data repository of "How sediment thickness influences subduction dynamics and seismicity"

Zenodo (CERN European Organization for Nuclear Research) (2020)

Silvia Brizzi Iris van Zelst Francesca Funiciello Fabio Corbi Ylona van Dinther

This repository provides the code and data to run the Seismo-Thermo-Mechanical model with a sediment thickness T_sed of 4 km on a cluster using executables.

10.5281/zenodo.3866654

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Subduction thrust seismicity in geodynamic numerical simulations compared to observations

The EGU General Assembly (2010)

Ylona van Dinther

Subduction thrust earthquakes occur over different spatial and temporal scales. In this study, the long-term earthquake cycle is investigated in a 4000x200 km ocean-continent subduction setting. Events or periods of rapid deformation, present within spontaneously formed localizations of plastic strain, are collected and quantified for comparison to observations and scaling to nature. The resulting database gives insight into the cyclic nature and timing of large earthquakes.

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Seismic cycle in the Nepal Himalaya: Instantaneous Modelling

AGU Fall Meeting Abstracts (2016)

Luca Dal Zilio Ylona van Dinther Taras Gerya

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Coupling a geodynamic seismic cycling model to rupture dynamic simulations

EGU General Assembly Conference Abstracts (2014)

Alice‐Agnes Gabriel Ylona van Dinther