A5025144254- earthquake and tectonic studies
- Seismic Waves and Analysis
- Seismology and Earthquake Studies
- Seismic Performance and Analysis
- Earthquake Detection and Analysis
- Seismic Imaging and Inversion Techniques
- Geotechnical Engineering and Underground Structures
- Geological and Geochemical Analysis
- Landslides and related hazards
- Geological and Geophysical Studies Worldwide
- High-pressure geophysics and materials
- Geophysics and Sensor Technology
- Sexuality, Behavior, and Technology
- Disaster Management and Resilience
- Geotechnical Engineering and Soil Mechanics
- Gambling Behavior and Treatments
- Turkish Urban and Social Issues
- Drilling and Well Engineering
- Insurance and Financial Risk Management
- Ultrasonics and Acoustic Wave Propagation
- Hydraulic Fracturing and Reservoir Analysis
- Obsessive-Compulsive Spectrum Disorders
- Geotechnical and Geomechanical Engineering
- Geophysical Methods and Applications
- Streptococcal Infections and Treatments
California Institute of Technology
2021-2025
Observatoire de la Côte d’Azur
2019-2024
Institut de Recherche pour le Développement
2019-2024
Centre National de la Recherche Scientifique
2019-2024
Université Côte d'Azur
2019-2024
Géoazur
2020-2022
Institut de Radioprotection et de Sûreté Nucléaire
2015-2021
Institut Français
2019-2021
Institut de physique du globe de Paris
2020-2021
Université Paris Cité
2020-2021
The point source parameters of the 11 November 2019 Le Teil earthquake (Mw 4.9) in France are revisited. Previous hypocenter determinations either located it on wrong side causative fault, or had to restrain depth ranges obtain epicenters compatible with fault geometry. Here, relocation is carried out three different approaches: (1) using as a master event an aftershock well-recorded by post-earthquake temporary seismic network; (2) optimizing velocity model two subareas; and (3) quarry...
On November 11, 2019, a M w 4.9 earthquake hit the region close to Montelimar (lower Rhône Valley, France), on eastern margin of Massif Central external part Alps. Occuring in moderate seismicity area, this is remarkable for its very shallow focal depth (between 1 and 3 km), magnitude, large damages it produced several villages. InSAR interferograms indicated rupture about 4 km long reaching surface reactivation ancient NE–SW La Rouvière normal fault reverse faulting agreement with...
Abstract The impact of earthquakes can be severely aggravated by cascading secondary hazards. 2018 7.5 Palu, Indonesia, earthquake led to devastating tsunamis and landslides, while triggered submarine landslides possibly contributed substantially generate the tsunami. rupture was supershear over most its length, but speed unexpectedly slow for a event, between wave velocity Eshelby's , an unstable range in conventional theory. Here, we investigate whether dynamic models including...
Abstract Observations of the 2019 magnitude 7.1 Ridgecrest, California, earthquake indicate a relatively slow rupture (2 km/s). The fault is surrounded by sedimentary rocks and low‐velocity damage zones, which can amplify ground motions but also down rupture. Here, we develop 3D dynamic models to elucidate significance such effects on Ridgecrest earthquake. We find that: (a) damage, being shallow, do not explain slip motion more than factor 3; (b) accounting for amplification improves...
SUMMARY The 2015 Mw 7.8 Gorkha, Nepal earthquake is the largest event to have struck capital city of Kathmandu in recent times. One its surprising features was frequency content recorded ground motion, exhibiting a notable amplification at low frequencies (<2 Hz) and contrasting depletion higher frequencies. latter has been partially attributed damper behaviour basin. While such weak high-frequency motion helped avoiding severe damage city, catastrophic outcomes earlier earthquakes...
Despite significant scientific advances in earthquake research and building codes, Türkiye remains vulnerable to earthquakes, as demonstrated by the tragic Kahramanmaraş February 2023. In contrast, countries such Chile Japan have successfully reduced damage through strict enforcement of codes effective public awareness campaigns. This paper highlights need for seismic resilience proposes actionable guidelines bridge gap between science society. These include comprehensive geoscience...
SUMMARY It has long been recognized that the effects of superficial geological layers, or site effects, can play a major role on seismic ground motion at free surface. In this study, we compute wave propagation in 2-D asymmetrical basin considering both soil non-linearity and pore-pressure effects. Equations elastodynamics are solved using spectral element method (SEM). The geometry gives rise to basin-edge generated waves, different for in-plane (P-SV) out-of-plane (SH) resulting non-linear...
Numerical modelling of seismic wave propagation, considering soil nonlinearity, has become a major topic in hazard studies when strong shaking is involved under particular conditions. Indeed, ground motion propagates saturated soils, pore pressure another important parameter to take into account successive phases contractive and dilatant behaviour are expected. Here, we model 1-D propagation linear nonlinear media using the spectral element numerical method. The study uses three-component...
ABSTRACT Near-field ground motion is the major blind spot of seismic hazard studies, mainly because challenges in accounting for source effects. Initial stress heterogeneity an important component physics-based approaches to ground-motion prediction that represents effects through dynamic earthquake rupture modeling. We hypothesize on a fault primarily originates from past background seismicity. develop new method generate stochastic distributions as superposition residual stresses left by...
<p>An earthquake of magnitude 5 (Mw 4.9) occurred near the town Le Teil, France on November 11 2019, causing damage locally and concern due to its proximity nuclear facilities. Despite moderate magnitude, this offers unique opportunities advance basic applied research earthquakes in general, including our understanding largest most destructive induced seismicity. We present here an overview source characteristics event and, based analysis InSAR seismological observations...
Damage zones are common around faults, but their effects on earthquake mechanics still incompletely understood. Here, we investigate how damage affects rupture patterns, source time functions and ground motions in 2D fully-dynamic cycle models. We find that back-propagating fronts emerge large faults can be triggered by residual stresses left previous ruptures or damage-induced pulse-to-crack transitions. Damage-induced modulated slip rate oscillations, amplify high-frequency radiation,...
The recent M 7.5 earthquake that struck Japan on January 1st, 2024, marked a significant event due to its substantial magnitude and surprisingly minimal damage. This occurrence serves as stark contrast Türkiye's experience, notably the devastating Kahramanmaraş of February 2023. Japan's impressive success in resilience, achieved through strict building code enforcement effective public awareness campaigns, stands sharp ongoing struggle with seismic vulnerability....
Abstract Damage zones are common around faults, but their effects on earthquake mechanics still incompletely understood. Here, we investigate how damage affects rupture patterns, source time functions (STF) and ground motions in 2D fully‐dynamic cycle models. We find that back‐propagating fronts emerge large faults can be triggered by residual stresses left previous ruptures or damage‐induced pulse‐to‐crack transitions. Damage‐induced modulated slip rate oscillations, amplify high‐frequency...
On November 11, 2019, a Mw 4.9 earthquake hit the region close to Montelimar (lower Rhône Valley, France), on eastern margin of Massif Central external part Alps. Occuring in moderate seismicity area, this is remarkable for its very shallow focal depth (between 1 and 3 km), magnitude, large damages it produced several villages. InSAR interferograms indicated rupture about 4 km long reaching surface reactivation ancient NE-SW La Rouviere normal fault reverse faulting agreement with...
SUMMARY The eastern offshore of Martinique is one the active areas Lesser Antilles Subduction Zone (LASZ). Although its seismicity moderate compared to other subduction zones, LASZ capable generating a M 7+ interplate earthquake and recent studies historical events, such as 8 1839 7–7.5 1946 earthquakes, confirm this possibility. Given high risk that can face in case unpreparedness for earthquake, lack regional seismic hazard study, we investigated through numerical modelling how ground...
It has long been recognized that the effects of superficial geological layers, or site effects, can play a major role on seismic ground motion at free surface. In this study, we compute wave propagation in 2-D asymmetrical basin considering both soil non-linearity and pore- pressure effects. Equations elastodynamics are solved using spectral element method (SEM). The geometry gives rise to basin-edge generated waves, different for in-plane (P-SV) out-of-plane (SH) resulting non-linear...
Numerical modelling of seismic wave propagation, considering soil nonlinearity, has become a major topic in hazard studies when strong shaking is involved under particular conditions. Indeed, ground motion propagates saturated soils, pore pressure another important parameter to take into account successive phases contractive and dilatant behaviour are expected. Here, we model 1-D propagation linear nonlinear media using the spectral element numerical method. The study uses three-component...