A5067792157- earthquake and tectonic studies
- Seismology and Earthquake Studies
- Geological and Geochemical Analysis
- High-pressure geophysics and materials
- Seismic Imaging and Inversion Techniques
- Earthquake Detection and Analysis
- Geological and Geophysical Studies
- Geotechnical and Geomechanical Engineering
- Geological Modeling and Analysis
- Geological Studies and Exploration
- Reservoir Engineering and Simulation Methods
- Geological and Geophysical Studies Worldwide
- Geochemistry and Geologic Mapping
- Seismic Waves and Analysis
- Methane Hydrates and Related Phenomena
- Hydraulic Fracturing and Reservoir Analysis
- Hydrocarbon exploration and reservoir analysis
- Drilling and Well Engineering
- Scientific Computing and Data Management
- Geomagnetism and Paleomagnetism Studies
- Geophysics and Gravity Measurements
- Complex Systems and Time Series Analysis
- Fault Detection and Control Systems
- Geophysics and Sensor Technology
- Geological Formations and Processes Exploration
Utrecht University
2009-2025
ETH Zurich
2012-2022
Mitchell Institute
2022
Texas A&M University
2022
McGill University
2022
Board of the Swiss Federal Institutes of Technology
2013
Roma Tre University
2009
The underestimation of the size recent megathrust earthquakes illustrates our limited understanding their spatiotemporal occurrence and governing physics. To unravel relation to associated subduction dynamics long‐term deformation, we developed a 2‐D continuum viscoelastoplastic model that uses an Eulerian‐Lagrangian finite difference framework with similar on‐ off‐fault We extend validation this numerical tool realistic zone setting resembles Southern Chile. resulting quasi‐periodic pattern...
The September 2018, $$M_w$$ 7.5 Sulawesi earthquake occurring on the Palu-Koro strike-slip fault system was followed by an unexpected localized tsunami. We show that direct earthquake-induced uplift and subsidence could have sourced observed tsunami within Palu Bay. To this end, we use a physics-based, coupled earthquake–tsunami modeling framework tightly constrained observations. model combines rupture dynamics, seismic wave propagation, propagation inundation. scenario, featuring sustained...
There is increasing evidence that the Himalayan seismicity can be bimodal: blind earthquakes (up to Mw ~ 7.8) tend cluster in downdip part of seismogenic zone, whereas infrequent great (Mw 8+) propagate up frontal thrust. To explore causes this bimodal seismicity, we developed a two-dimensional, seismic cycle model Nepal Himalaya. Our visco-elasto-plastic simulations reproduce important features earthquake cycle, including interseismic strain and pattern. Bimodal emerges as result relatively...
Abstract We use a recent compilation of geodetic data surface displacements in fully Bayesian approach to derive probabilistic estimate interseismic coupling along the Main Himalayan Thrust (MHT). Our highlights four large, highly coupled patches separated by three potential barriers low coupling. Locked overlap with estimated rupture areas historical large earthquakes over past centuries. The coincident spatial variability coupling, seismicity, and prominent active topography suggests...
Abstract Dynamic modeling of sequences earthquakes and aseismic slip (SEAS) provides a self‐consistent, physics‐based framework to connect, interpret, predict diverse geophysical observations across spatial temporal scales. Amid growing applications SEAS models, numerical code verification is essential ensure reliable simulation results but often infeasible due the lack analytical solutions. Here, we develop two benchmarks for three‐dimensional (3D) problems compare verify codes based on...
The physics governing the seismic cycle at seismically active subduction zones remains poorly understood due to restricted direct observations in time and space. To investigate zone dynamics associated interplate seismicity, we validate a continuum, visco‐elasto‐plastic numerical model with new laboratory approach (Paper 1). analogous setup includes visco‐elastic gelatin wedge underthrusted by rigid plate defined velocity‐weakening ‐strengthening regions. Our geodynamic simulation friction...
Abstract We present a 2‐D numerical modeling approach for simulating wide slip spectrum in viscoelastoplastic continuum. The key new model component is an invariant reformulation of the classical rate‐ and state‐dependent friction equations, which designed earthquake simulations along spontaneously evolving faults. Here we describe methodology demonstrate that it accurate stable setup consisting mature strike‐slip fault zone. show nucleation propagation are well resolved, as supported by...
Abstract Taking the full complexity of subduction zones into account is important for realistic modeling and hazard assessment zone seismicity associated tsunamis. Studying requires numerical methods that span a large range spatial temporal scales. We present first coupled framework resolves dynamics over millions years earthquake down to fractions second. Using two‐dimensional geodynamic seismic cycle (SC) model, we model 4 million followed by cycles spontaneous megathrust events. At...
Our physical understanding of earthquakes, along with our ability to forecast them, is hampered by limited indications on the current and future state stress faults. Integrating indirect observations, laboratory experiments physics-based numerical modelling quantitatively estimate this evolution crucial. However, quantitative integrations are tenuous in light scarcity uncertainty observations difficulty physics governing earthquakes. We show that prior knowledge, their errors, can be...
ABSTRACT Numerical modeling of earthquake dynamics and derived insight for seismic hazard relies on credible, reproducible model results. The sequences earthquakes aseismic slip (SEAS) initiative has set out to facilitate community code comparisons, verify advance the next generation physics-based models that reproduce all phases cycle. With goal advancing SEAS robustly incorporate physical geometrical complexities, here we present comparison results from two new benchmark problems: BP1-FD...
Shallow off‐megathrust subduction events are important in terms of hazard assessment and coseismic energy budget. Their role spatiotemporal occurrence, however, remain poorly understood. We simulate their spontaneous activation propagation using a newly developed 2‐D, physically consistent, continuum, viscoelastoplastic seismo‐thermo‐mechanical modeling approach. The characteristics simulated normal within the outer rise splay antithetic wedge resemble seismic seismological observations...
Abstract It has long been recognized that sediments subducting along the megathrust influence occurrence of giant ( M w ≥ 8.5 ) earthquakes. However, limited observation span and concurrent multiple parameters on behavior prevent us from understanding how affect earthquake size frequency. Here, we address these limitations by using two‐dimensional, visco‐elasto‐plastic, seismo‐thermo‐mechanical numerical models to isolate sediment thickness affects subduction geometry seismicity. Our results...
SUMMARY How does megathrust earthquake rupture govern tsunami behaviour? Recent modelling advances permit evaluation of the influence 3-D dynamics on genesis, propagation, and coastal inundation. Here, we present explore a virtual laboratory in which source arises from coseismic seafloor displacements generated by dynamic model. This is achieved linking open-source computational models that follow discontinuous Galerkin schemes are facilitated highly optimized parallel algorithms software....
Abstract Subduction megathrust earthquakes occur at the interface between subducting and overriding plates. These hazardous phenomena are only partially understood because of absence direct observations, restriction instrumental seismic record to past century, limited resolution/completeness historical geological archives. To overcome these restrictions, modeling has become a key‐tool study earthquakes. We present novel model investigate cycle subduction thrusts using complementary analog...
Abstract Orientations of natural fault systems are subject to large variations. They often contradict classical Coulomb failure theory as they misoriented relative the regional Andersonian stress field. This is ascribed local effects structural or heterogeneities and reorientations structures stresses on long term. To better understand relation between orientation stresses, we simulate spontaneous growth its effect Our approach incorporates earthquake rupture dynamics, viscoelastoplastic...
Abstract Detailed imaging of accretionary wedges reveals splay fault networks that could pose a significant tsunami hazard. However, the dynamics multiple activation during megathrust earthquakes and consequent effects on generation are not well understood. We use 2‐D dynamic rupture model with complex topo‐bathymetry six curved geometries constrained from realistic tectonic loading modeled by geodynamic seismic cycle consistent initial stress strength conditions. find all faults...
The central Apennines (Italy) are located within the geodynamically complex Central Mediterranean. Subduction and continental collision of Adriatic plate underneath Tyrrhenian appear to have ceased region is undergoing large-scale extension 3-4 mm/yr accompanied by large normal faulting earthquakes. main drivers seismicity, surface deformation remain unresolved, inhibiting a fundamental understanding Apennine geology progress towards seismic hazard assessment. Multiple driving mechanisms...
Abstract Numerical simulations of Sequences Earthquakes and Aseismic Slip (SEAS) have rapidly progressed to address fundamental problems in fault mechanics provide self‐consistent, physics‐based frameworks interpret predict geophysical observations across spatial temporal scales. To advance SEAS with rigor reproducibility, we pursue community efforts verify numerical codes an expanding suite benchmarks. Here present code comparison results from a new set quasi‐dynamic benchmark BP6‐QD‐A/S/C...
Abstract High‐resolution computer simulations of earthquake sequences in three or even two dimensions pose great demands on time and energy, making lower‐cost simplifications a competitive alternative. We systematically study the advantages limitations that eliminate spatial quasi‐dynamic sequence models, from 3D models with 2D fault plane down to 0D 1D point. demonstrate that, when produce quasi‐periodic characteristic earthquakes, their behavior is qualitatively similar lower‐dimension...
Abstract Correlations between geodynamic parameters and interplate seismicity characteristics in subduction zones are generally weak due to the short instrumental record multiparameter influences. To investigate role of velocity V s width seismogenic zone W on maximum magnitude M max , seismic rate τ characteristic recurrence c moment release MRR we use synthetic data sets from simplified analog numerical models gain insight into natural seismicity. Our suggest that increases with is...
The September 2018, Mw 7.5 Sulawesi earthquake occurring on the Palu-Koro strike-slip fault system was followed by an unexpected localized tsunami. We show that direct earthquake-induced uplift and subsidence could have sourced observed tsunami within Palu Bay. To this end, we use a physics-based, coupled earthquake-tsunami modeling framework tightly constrained observations. model combines rupture dynamics, seismic wave propagation, propagation inundation. scenario, featuring sustained...