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Last name: VERGNOLLE
First name: Mathilde
International audience
In this work we study the current kinematic of Mongolia in the northern part of Asia and the dynamics of the deformation in Mongolia and Asia First we present the 1994-2002 Mongolia-Baikal GPS velocity field ( 50 sites) with respect to Eurasia Velocities show that 15% of the IN/EU convergence is accommodated north of the Tien Shan by N-S...
In this study, we reestimate the source model of the 1997 Mw 7.2 Zirkuh earthquake (northeastern Iran) by jointly optimizing intermediate‐field Interferometry Synthetic Aperture Radar data and near‐field optical correlation data using a two‐step fault modeling procedure. First, we estimate the geometry of the multisegmented Abiz fault using a...
International audience
Le système de distribution Epos-GNSS est une e-infrastructure conçue pour diffuser des données et produits GNSS. Le portail de données Epos-GNSS est le point d'accès central du système à ces données.
Calculations of Coulomb stress changes have shown that moderate to large earthquakes may increase stress at the location of future earthquakes. Coulomb stress transfers have thus been widely accepted to explain earthquake sequences, especially for sequences occurring within parallel or collinear fault systems. Relating, under this framework,...
EPOS-GNSS est le volet GNSS (Global Navigation Satellite System) de l'infrastructure de recherche européenne EPOS (European Plate Observing System). Son objectif est d'archiver et disséminer les données et produits GNSS à l'échelle de l'Europe. EPOS-GNSS inclut 14 services parmi lesquels le traitement en double-différence des stations EPOS. Le...
The relevance of plate tectonics concepts to the description of deformation of large continental areas like Asia is subject to much debate. For some, the deformation of continents is better described by rigid motion of lithospheric blocks with strain concentrated along narrow fault zones. For others, it is better described by viscous flow of a...
After large earthquakes, parts of the fault continue to slip for days to months during the afterslip phase, a behaviour documented for many earthquakes. Yet, little is known about the early stage, i.e., from minutes to hours after the mainshock. Its detailed study requires continuous high-rate position time series close to the fault, and...
Abstract. It is well-established that the post-seismic slip results from the combined contribution of seismic and aseismic processes. However, the partitioning between these two modes of deformation remains unclear due to the difficulty of inferring detailed and robust descriptions of how both evolve in space and time. This is particularly true...
International audience
It is well-established that the post-seismic slip results from the combined contribution of seismic and aseismic processes. However, the partitioning between these two modes of deformation remains unclear due to the difficulty of inferring detailed and robust descriptions of how both evolve in space and time. This is particularly true just...
After large earthquakes, parts of the fault continue to slip for days to months during the afterslip phase, a behaviour documented for many earthquakes. Yet, little is known about the early stage, i.e., from minutes to hours after the mainshock. Its detailed study requires continuous high-rate position time series close to the fault, and...
A large slow slip event (SSE) had been expected for the Guerrero gap for 2010. It was actually observed with an onset in July 2009. Comparison with the preceding large SSEs, which occurred in 2002 and 2006, highlights both persistent characteristics of the Guerrero SSEs (e.g. the localization of slip in the seismogenic part of the subduction...
International audience
After decades of research on continental tectonics, there is still no consensus on the mode of deformation of continents or on the forces that drive their deformation. In Asia the debate opposes edge-driven block models, requiring a strong lithosphere with strain localized on faults, to buoyancy-driven continuous models, requiring a viscous...
EPOS-GNSS is the Thematic Core Service being implemented in the framework of the European Plate Observing System (EPOS) focused on management and dissemination of GNSS (Global Navigation Satellite Systems) Data and Products. The European Research Infrastructure Consortium (ERIC) has provided to EPOS a legal personality and capacity that is...
We analyze continuous GPS measurements along the central Ecuador subduction segment to quantify three years of postseismic deformation that followed the Mw 7.8 April 16 2016 Pedernales earthquake. We perform a kinematic inversion solving for the daily slip along the subduction interface to retrieve the afterslip evolution through space and...
In subduction zones, slip along the plate interface occurs in various modes including earthquakes, steady slip, and transient accelerated aseismic slip during either Slow Slip Events (SSE) or afterslip. We analyze continuous GPS measurements along the central Ecuador subduction segment to illuminate how the different slip modes are organized in...
International audience
GNSS is a standard tool for monitoring and studying the Earth's dynamic environment. However, the development of dense GNSS measurements remains limited in many experiments by the cost of high-class geodetic equipment to achieve the high precision required by many applications. Recently, multi-constellation, multi-frequency, low-power and,...
The present work develops a comprehensive probabilistic seismic hazard study for Lebanon, a country prone to a high seismic hazard since it is located along the Levant fault system. The historical seismicity has documented devastating earthquakes which have struck this area. Contrarily, the instrumental period is typical of a low-to-moderate...