A5047433777- earthquake and tectonic studies
- Earthquake Detection and Analysis
- Seismology and Earthquake Studies
- Seismic Waves and Analysis
- High-pressure geophysics and materials
- Seismic Imaging and Inversion Techniques
- Geological and Tectonic Studies in Latin America
- Geological and Geochemical Analysis
- Geophysics and Sensor Technology
- Seismic Performance and Analysis
- Geological and Geophysical Studies Worldwide
- Geological and Geophysical Studies
- Geological Modeling and Analysis
- Computational Fluid Dynamics and Aerodynamics
- Navier-Stokes equation solutions
- Structural Health Monitoring Techniques
- GNSS positioning and interference
- Geophysical Methods and Applications
- Aquatic and Environmental Studies
- Rock Mechanics and Modeling
- Methane Hydrates and Related Phenomena
- Disaster Management and Resilience
- Reservoir Engineering and Simulation Methods
- Geochemistry and Geologic Mapping
- Environmental and Ecological Studies
Institut de physique du globe de Paris
2016-2025
Université Paris Cité
2016-2025
Centre National de la Recherche Scientifique
2016-2025
Sorbonne Paris Cité
2013-2025
Sorbonne Université
2018-2019
Observatoire de la Côte d’Azur
2010-2014
Institut de Recherche pour le Développement
2007-2014
Université Côte d'Azur
2008-2014
Géoazur
2006-2013
Istituto Nazionale di Geofisica e Vulcanologia
2004-2005
The shallow depth underthrust earthquake of February 27, 2010 (Mw 8.8) ruptured the subduction plate interface in central Chile between 34°S and 38°S. We retrieve spatial temporal distribution slip during this mega‐earthquake through a joint inversion teleseismic records, InSAR High Rate GPS (HRGPS) data. Additionally, our model is shown to agree with broadband surface waves. Rupture initiated at about 32 km propagated bilaterally resulting two main zones located SSW NNE hypocenter....
We investigate the rupture process of 25 April 2015 Gorkha earthquake (Mw = 7.9) using a kinematic joint inversion teleseismic waves, strong motion data, high-rate GPS, static and synthetic aperture radar (SAR) data. The is found to be simple in terms coseismic slip even more velocity, as both results complementing back projection analysis show that main patch broke unilaterally at steady velocity 3.1–3.3 km/s. This feature likely contributes moderate peak ground acceleration (0.2 g)...
The 2001 Kunlunshan earthquake was an extraordinary event that produced a 400-km-long surface rupture. Regional broadband recordings of this provide opportunity to accurately observe the speed at which fault ruptures during earthquake, has important implications for seismic risk and understanding physics. We determined rupture propagated on average 3.7 3.9 km/s, exceeds shear velocity brittle part crust. Rupture started sub-Rayleigh wave became supershear, probably approaching 5 after about...
Accurate and fast magnitude determination for large, shallow earthquakes is of key importance post-seismic response tsumami alert purposes. When no local real-time data are available, which today the case most subduction earthquakes, first information comes from teleseismic body waves. Standard body-wave methods give accurate magnitudes up to Mw = 7–7.5. For larger analysis more complex, because non-validity point-source approximation interaction between direct surface-reflected phases. The...
Abstract We document a 1 week long slow slip event (SSE) with an equivalent moment magnitude of 6.0–6.3 which occurred in August 2010 below La Plata Island (Ecuador), south the rupture area 1906 Mw = 8.8 megathrust earthquake. GPS data reveal that SSE at depth about 10 km, within downdip part shallow (<15 km), isolated, locked patch along subduction interface. The availability both broadband seismometer and continuous geodetic station located Island, km above SSE, enables careful analysis...
Frequent slow slip events and rapid postseismic reveal persistent aseismic fault areas delineating future seismic ruptures.
Abstract Global seismographic networks (GSNs) emerged during the late nineteenth and early twentieth centuries, facilitated by seminal international developments in theory, technology, instrumentation, data exchange. The mid‐ to late‐twentieth century saw creation of World‐Wide Standardized Seismographic Network (1961) International Deployment Accelerometers (1976), which advanced global geographic coverage as seismometer bandwidth increased greatly allowing for recording Earth's principal...
Gravity gets into the earthquake game Earthquakes generate large movements of mass, which slightly change gravitational field. Unlike elastic waves that propagate from earthquake, gravity perturbations travel at speed light. Vallée et al. have finally observed these in seismometer records great Tohoku Japan 2011. The signal would allowed an accurate magnitude estimation minutes, rather than hours, for this catastrophic earthquake. Science , issue p. 1164
Abstract The 11 March 2011 M w 9.0 Tohoku‐Oki earthquake was recorded by an exceptionally large amount of diverse data offering a unique opportunity to investigate the details this major megathrust rupture. Many studies have taken advantage very dense Japanese onland strong motion, broadband, and continuous GPS networks in sense. But resolution tests variability proposed solutions highlighted difficulty uniquely resolve slip distribution from these networks, relatively distant source region,...
ABSTRACT Since 2009, Oklahoma has experienced a soar in induced seismicity, side effect of extensive saltwater injection into subsurface sedimentary rocks. The seismic hazard entailed by these regional‐scale operations is, however, difficult to assess. 3 September 2016 M w 5.8 Pawnee earthquake is the largest since increase activity. event was preceded an m b 3.2 foreshock two days prior, and changes rates have been reported on wastewater disposal wells located less than 10 km from...
Using a joint inversion of seismological waveforms and ground displacement observations, we estimate several parameters the fault geometry rupture process Mw = 6.9 May 21, 2003 Boumerdes‐Zemmouri earthquake. The relocated epicenter is considered as known parameter. Total length, duration, maximum slip are 55 km (from 3.4°E to 4.0°E), 12 s, 3 m. modeled south dipping reverse fault, oriented ENE‐WSW outcrops few offshore which consistent with absence observed surface inland. Two shallow...
Seismic array based analysis of the major Kokoxili earthquake (Tibet, 14 November 2001) yields an unambiguous reconstruction seismic rupture history and relates it to generated radiation. We demonstrate that after a classical sub‐Rayleigh velocity stage, speed has jumped supershear values close compressional wave over 175‐km‐long fault segment, before abruptly slowing down in late part earthquake. The transition locations between these three phases are correlated with geometry associated...
After the January 12, 2010, Haiti earthquake, we deployed a mainly offshore temporary network of seismologic stations around damaged area.The distribution recorded aftershocks, together with morphotectonic observations and mainshock analysis, allow us to constrain complex fault pattern in area.Almost all aftershocks have N-S compressive mechanism, not expected left-lateral strike-slip mechanism.A first-order slip model shows N264°E north-dipping plane, major component strong reverse...
Research Article| May 25, 2016 Stress‐Drop Variability of Shallow Earthquakes Extracted from a Global Database Source Time Functions Françoise Courboulex; Courboulex aUniversité Nice Sophia Antipolis, CNRS, Géoazur, Observatoire de la Côte d’Azur, Valbonne, Francecourboulex@geoazur.unice.fr Search for other works by this author on: GSW Google Scholar Martin Vallée; Vallée bInstitut Physique du Globe Paris, Sorbonne Paris Cité, Université Diderot, UMR 7154 Francevallee@ipgp.frchounet@ipgp.fr...
Abstract Here we analyze the rupture process of 29 December 2020 M W 6.4 Petrinja earthquake (Croatia), largest event instrumentally recorded in this area characterized by a moderate strain‐rate intraplate setting. We use foreshocks and aftershocks, at more than 80 broadband stations located 70–420 km from earthquake, as empirical Green's functions (EGFs) to separate source effects propagation local site effects. First, deconvolve mainshock P‐wave time windows EGFs frequency domain obtain...