A5037828184- earthquake and tectonic studies
- Seismology and Earthquake Studies
- Geological and Tectonic Studies in Latin America
- Earthquake Detection and Analysis
- Geological and Geochemical Analysis
- High-pressure geophysics and materials
- Methane Hydrates and Related Phenomena
- Seismic Waves and Analysis
- Geological formations and processes
- Reservoir Engineering and Simulation Methods
- Geological and Geophysical Studies Worldwide
Karlsruhe Institute of Technology
2024
Institut de Recherche pour le Développement
2020-2023
Centre National de la Recherche Scientifique
2020-2023
Observatoire de la Côte d’Azur
2020-2023
Université Côte d'Azur
2020-2023
Géoazur
2019-2021
Subduction zones generate the largest earthquakes on Earth, yet their detailed structure, and its influence seismic aseismic slip, remains poorly understood. Geological studies of fossil subduction characterize seismogenic interface as a 100 m-1 km thick zone1-3 in which deformation occurs mostly metres-thick faults1,3-6. Conversely, seismological studies, with larger spatial coverage temporal resolution but lower resolution, often image kilometres-wide band seismicity7. Thus, how when these...
We present preliminary results of the analysis interseismic coupling at southern Peru subduction zone, with special focus on Nazca Ridge and fracture zone. This study is based GPS data from over 120 permanent field stations collected during last decade. The obtained velocity shows current state deformation Peruvian margin. inversion geodetic displacements allowed us to estimate plate interface. Our show that heterogeneous, two areas significant low weak coefficient, one located ridge other...
The southern Peru subduction zone is a complex region, marking the transition between flat slab associated with Nazca Ridge in North and much steeper south. area has been affected by several large earthquakes over past 20 years, like Mw 7.2 earthquake that occurred on June 28th 2024 close to city of Acari, an already ruptured 2013 2018. Here we use data from 26 seismic stations active March 2022 December as part DEEPTrigger project, along 16 permanent Peruvian 15 Chilean stations,...
Abstract Repeating earthquakes repeatedly rupture the same seismic asperity and are strongly linked to aseismic slip. Here, we study repeating aftershocks of April 16, 2016 M W 7.8 Pedernales earthquake in Ecuador, which generated a large amount afterslip. Using temporary permanent stations, correlate waveforms from one‐year catalog aftershocks. We sort events with minimum correlation coefficient 0.95 into preliminary families, then expanded using template‐matching include 2015 June 2017. In...
The north Ligurian margin is a complex geological area in many ways. It has witnessed several phases of highly contrasting deformation styles, at both crustal scale and that shallower cover tectonics, simultaneously or quick succession, with significant spatial variability. This interplay mirrored the resulting intricate structures make it hard to identify active faults responsible for both, seismicity observed, tectonic inversion undergone by margin, identified longer time scales on...
Abstract Subduction zones are highly heterogeneous regions capable of hosting large earthquakes. To better constrain the processes at depth, we analyze source properties 1514 aftershocks 16th April 2016 M w 7.8 Pedernales earthquake (Ecuador) using spectral ratios. We able to retrieve accurate seismic moments, stress drops, and P S corner frequencies for 341 aftershocks, including 136 events belonging families repeating find that, studied magnitude range ( 2–4), drops appear increase as a...
The Ecuador-Colombia subduction zone is a complex and spatially heterogeneous region that hosts both shallow aseismic slip large megathrust earthquakes, where both  inter-seismic post-seismic seismicity have been linked to slip. Repeating which are the result of repeated loading failure single asperities on fault, valuable tool in studying as well monitoring evolution fault properties over time. In this study, we search for repeating earthquakes within one year aftershocks following...
The simplified view of the subduction interface is that a single plane along which seismic and aseismic deformation occurs. In reality, however, exhumed zones geophysical imaging have shown seismogenic plate deformed, 100m-1km thick tabular region. Within this region, we currently do not know if slip localized on fault or distributed over several active faults, how impacts seismogenesis timing deformation. Here, use high-resolution earthquake locations to shed light these questions.We focus...
<p>Understanding the physical parameters and processes that control seismogenic behavior of subduction zones megathrust faults remains one outstanding challenges in Earth Sciences.</p><p>Here we present important results from several large seismic experiments aimed at addressing this question. These focused on three off Greece, Lesser Antilles islands, Ecuador, with different convergence rates activities. Surveys included multibeam bathymetry,...
<p>Repeating earthquakes are that repeatedly break a single, time-invariant fault patch. They generally associated with aseismic slip, which is thought to load asperities, leading repeated rupture. Repeating therefore useful tools study slip and mechanics, possible applications earthquake triggering, loading rates forecasting.</p><p>In this study, we analyze one year of aftershocks following the 16<sup>th</sup> April 2016...