A5063975999- earthquake and tectonic studies
- Geological and Geophysical Studies Worldwide
- Seismic Waves and Analysis
- Seismic Imaging and Inversion Techniques
- Geological and Geochemical Analysis
- Seismology and Earthquake Studies
- High-pressure geophysics and materials
- Earthquake Detection and Analysis
- Archaeological and Historical Studies
- Geophysics and Sensor Technology
- Landslides and related hazards
- Seismic Performance and Analysis
- Geological formations and processes
- Archaeological and Geological Studies
- Drilling and Well Engineering
- Ancient and Medieval Archaeology Studies
- Methane Hydrates and Related Phenomena
- Risk and Safety Analysis
- Structural Response to Dynamic Loads
- Underwater Acoustics Research
- Geological Modeling and Analysis
- Geology and Paleoclimatology Research
- Planetary Science and Exploration
- Statistical and numerical algorithms
- Geochemistry and Geologic Mapping
Observatoire Midi-Pyrénées
2013-2025
Institut de Recherche en Astrophysique et Planétologie
2014-2024
Centre National de la Recherche Scientifique
2008-2024
Université Toulouse III - Paul Sabatier
2011-2024
Université de Toulouse
2008-2023
Géosciences Environnement Toulouse
2010-2023
Research Article| June 01, 2016 The deep roots of the western Pyrenees revealed by full waveform inversion teleseismic P waves Yi Wang; Wang 1Géosciences Environnement Toulouse, UMR 5563, Observatoire Midi Pyrénées, Université Paul Sabatier, 31400 France2School Earth and Space Science, University Science Technology China, Hefei 230026, China Search for other works this author on: GSW Google Scholar Sébastien Chevrot; Chevrot * France *E-mail: sebastien.chevrot@get.omp.eu Vadim Monteiller;...
Abstract The aim of the SI-Hex project (acronym for « Sismicité Instrumentale de l’Hexagone ») is to provide a catalogue seismicity metropolitan France and French marine economic zone period 1962–2009 by taking into account contributions various seismological networks observatories from its neighbouring countries. has been launched jointly Bureau Central Sismologique Français (CNRS-University/BCSF) Laboratoire Détection et Géophysique (CEA-DAM/LDG). One main motivations end user with best...
Abstract The lithospheric structures beneath the Pyrenees, which holds key to settle long‐standing controversies regarding opening of Bay Biscay and formation are still poorly known. temporary PYROPE IBERARRAY experiments have recently filled a strong deficit seismological stations in this part western Europe, offering new unique opportunity image crustal mantle with unprecedented resolution. Here we report results first tomographic study Pyrenees relying on rich data set. important aspects...
We exploit the data from five seismic transects deployed across Pyrenees to characterize deep architecture of this collisional orogen. map main interfaces beneath each transect by depth migration P-to-S converted phases. The migrated sections, combined with results recent tomographic studies and maps Bouguer isostatic anomalies, provide a coherent crustal-scale picture belt. In Western Pyrenees, North Pyrenean Zone, continuous band high density/velocity material is found at very shallow...
We locate the sources of double‐frequency (or secondary) microseisms in western Europe by frequency slowness analysis array data as well polarization and amplitude at individual stations. Array uses recorded a temporary broadband stations that we deployed Quercy region (southwest France) those from Gräfenberg array, 2 December 2005 to 30 January 2006. determine attenuation laws for generated Mediterranean Sea Atlantic Ocean, which allow us use noise amplitudes estimate distances source. then...
The Pyrenean mountain range is a slowly deforming belt with continuous and moderate seismic activity. To quantify its deformation field, we present the velocity field estimated from GPS survey of Pyrenees spanning 18 yr. PotSis ResPyr networks, including total 85 sites, were installed first measured in 1992 1995–1997, respectively, remeasured 2008 2010. We obtain velocities less than 1 mm yr−1 across range. for individual stations do not differ significantly zero 95 per cent confidence. Even...
The lithospheric architecture of the Pyrenees is still uncertain and highly debated. Here, we provide new constraints from a high-resolution 3-D S-wave velocity model adjacent foreland basins. This obtained ambient noise tomography on records temporary permanent seismic arrays installed in southwestern France northern Spain. We first computed group maps for Rayleigh waves 5 to 55 s period range using correlation stacks at 1500–8500 station pairs. As crust very heterogeneous, poor results...
We present a compilation of over 1700 focal mechanisms for nearly 1300 earthquakes in metropolitan France and bordering regions Western Europe. It is based on both published unpublished sources (articles, reports, observatory websites) which the mechanism solutions have been verified internal consistency, corrected cases minor errors rejected major inconsistencies between parameters. The database, labeled FMHex20, first version should be regularly updated future as part an ongoing effort...
SUMMARY The Lacq area in southwest France has been associated with continuous moderate induced seismic activity since 1969. However, the mechanisms driving this seismicity are not fully understood: reservoir depletion proposed as main factor, and more recently wastewater injection suggested to play a important role. interpretation of these relies heavily on quality earthquake locations, which we prove be weak due lack local instrumentation for several years. In order provide most complete...
Abstract Ocean activity produces continuous and ubiquitous seismic energy mostly in the 2–20 s period band, known as microseismic noise. Between 2 10 period, secondary microseisms (SM) are generated by swell reflections close to shores and/or opposing swells deep ocean. However, unique conditions required order for surface waves deep‐ocean be observed on land. By comparing short‐duration power spectral densities at both Atlantic shoreline inland stations, we show that ocean tides strongly...
Local seismic networks are usually designed so that earthquakes located inside them (primary azimuthal gap <<180°) and close to the stations (0–100 km). With these local or near-regional (0°–5°), many seismological observatories still routinely locate using 1-D velocity models. Moving towards 3-D location algorithms requires robust This work takes advantage of monitoring spanning more than 30 yr in Pyrenean region. We investigate influence a well-designed model with station corrections...
We present a 3-D shear wave velocity model of the Mauléon and Arzacq Basins from surface down to 10 km depth, inverted phase maps at periods between 2 9 s. These were obtained by analyzing coherent fronts extracted ambient seismic noise recorded large-N Maupasacq array with matched filtering approach. This new is in good agreement local earthquake tomography study performed on same acquisition dataset. Our passive imaging models reveal upper crustal architecture Basins, details basement its...
Abstract This paper presents a critical review of the main seismological data which constrain Pyrenean tectonics, mostly spatial distribution hypocenters and fault plane solutions. A new seismicity map is computed for period 1989-99, compilation published focal solutions presented discussed. The range results from convergence Iberian Eurasian plates about 65 Ma. followed extension (-115 to -80 Ma), related opening Bay Biscay. boundary between two plates, North Fault (NPF), recognized as...
SUMMARY The measurements of acoustic waves created by a quake are great interest for planets with hot and dense atmospheres, like Venus, because surface deployments seismometers will last only few hours, whereas freeflying balloons could fly many days. Infrasound sensors can also be used to constrain subsurface properties during active seismic experiments. This study presents controlled source seismo-acoustic experiment using infrasonic accelerometers mounted on tethered helium balloon. Both...
A widely felt, ML = 5.0 earthquake occurred in the central French Pyrenees on 2006 November 17, close to pilgrimage city of Lourdes, a region where strong historical earthquakes produced severe damage and casualties 17th 18th centuries. Seismic recordings performed by dense permanent networks temporary stations allowed an exhaustive study this event its aftershock sequence, revealing great coherency all parameters which characterize rupture. More than 250 hypocentres, located 3-D tomographic...
Passive Seismic is a broad term, incorporating various techniques and methodologies, which all exploit some part of the seismic signal that naturally exists or occurs in Earth’s subsurface. This may differ significantly form and/or provenance (e.g. earthquakes, ambient noise, etc.), as well frequency content and, subsequently, subspace on it carry useful information.
Seismic monitoring of southwestern France began in the 1960s, and homogeneous coverage by observation networks has been place since 1990s. The accumulation data now allows a refined understanding regional seismicity, not only on its spatial aspects, but also regularity earthquake distribution over time. This paper is both review work carried out subject, progress report current knowledge seismicity seismotectonic context. With support maps, available catalogs are exploited at different...