A5002473210- earthquake and tectonic studies
- Landslides and related hazards
- Geological and Geochemical Analysis
- High-pressure geophysics and materials
- Seismic Imaging and Inversion Techniques
- Earthquake Detection and Analysis
- Seismology and Earthquake Studies
- Seismic Waves and Analysis
- Hydraulic Fracturing and Reservoir Analysis
- Cryospheric studies and observations
- Rock Mechanics and Modeling
- Reservoir Engineering and Simulation Methods
- Geological and Geophysical Studies Worldwide
- Granular flow and fluidized beds
- Theoretical and Computational Physics
- Geology and Paleoclimatology Research
- Complex Systems and Time Series Analysis
- Hydrocarbon exploration and reservoir analysis
- Microstructure and mechanical properties
- Drilling and Well Engineering
- Arctic and Antarctic ice dynamics
- Methane Hydrates and Related Phenomena
- Seismic Performance and Analysis
- Climate change and permafrost
- nanoparticles nucleation surface interactions
Institut des Sciences de la Terre
2011-2024
Université Gustave Eiffel
2011-2024
Université Grenoble Alpes
2010-2024
Institut de Recherche pour le Développement
2011-2024
Centre National de la Recherche Scientifique
2009-2024
Université Savoie Mont Blanc
2019-2024
Université Joseph Fourier
1997-2012
Laboratoire des Écoulements Géophysiques et Industriels
1990-2010
Centre de Gestion Scientifique
2009
United States Geological Survey
2004-2005
Hundreds of shallow, small to moderate earthquakes have occurred near the Lacq deep gas field in southwestern France since 1969. These are clearly separated from tectonic seismicity occurring Pyrenees, 25 km southwest. The induced began when reservoir pressure had declined by ∼30 MPa. Repeated leveling over shows localized subsidence reaching a maximum 60 mm 1989. Segall (1989) suggested that poroelastic stressing, associated with volumetric contraction rocks, is responsible for fluid...
Abstract. We study the rock fall volume distribution for three inventories and we fit observed data by a power-law distribution, which has recently been proposed to describe landslide distributions, is also many other natural phenomena, such as volcanic eruptions or earthquakes. use these statistical distributions of past events estimate occurrence rates on studied areas. It an alternative deterministic approaches, have not proved successful in predicting individual falls. The first one...
We analyze the volume distribution of natural rockfalls on different geological settings (i.e., calcareous cliffs in French Alps, Grenoble area, and granite Yosemite cliffs, California Sierra) ranges regional worldwide catalogs). Contrary to previous studies that included several types landslides, we restrict our analysis rockfall sources which originated subvertical cliffs. For three data sets, find volumes follow a power law with similar exponent value, within error bars. This was also...
The inverse Omori law for foreshocks discovered in the 1970s states that rate of earthquakes prior to a mainshock increases on average as power ∝ 1/( t c − ) p ′ time occurring at . Here, we show this results from direct aftershocks describing decay ∼ seismicity after an earthquake, provided any earthquake can trigger its suit aftershocks. In picture, seismic activity is sum spontaneous tectonic loading and triggered by all preceding events weighted their corresponding law. then emerges...
We analyse the statistical pattern of seismicity before a 1–2 10 3 m chalk cliff collapse on Normandie ocean shore, Western France. show that power law acceleration rate and energy in both 40 Hz–1.5 kHz 2 Hz–10kHz frequency range, is defined orders magnitude, within hours from time. Simultaneously, average size seismic events increases toward time to failure. These situ results are derived only station located one rupture length distance rock fall plane. They mimic “critical point” like...
Accelerating displacements preceding some catastrophic landslides have been found to display a finite time singularity of the velocity v ∼1/( t c − ) [ Voight , 1988a 1988b ]. Here we provide physical basis for this phenomenological law based on slider block model using state‐ and velocity‐dependent friction established in laboratory. This accounts generalizes Voight's observation: Depending ratio B / A two parameters rate state initial frictional sliding surfaces characterized by reduced...
The dislocation dynamics during the creep deformation of single crystals ice Ih was studied using acoustic emission (AE) measurements. AE activity recorded uniaxial compression and torsion tests. results were interpreted in terms with help an source model relating amplitude event to number dislocations involved their velocity. This first validated by a comparison between global strain rate. Then, it possible evaluate density moving deformation. Two regimes revealed. Without significant...
The Gutenberg–Richter b-value is thought to reflect the stress conditions in crust; therefore, spatial and/or temporal variations of can provide important information regarding crustal tectonics. We investigate variation with depth seven selected areas Southern California. A previous study provided a detailed mapping b California; our less systematic than this study. Our approach more similar regional one used by Mori & Abercrombie. In comparison these studies, investigation indicates that...
Abstract The ability to predict the magnitude of an earthquake caused by deep fluid injections is important factor for assessing safety reservoir storage and seismic hazard. Here, we propose a new approach evaluate energy released during injection integrating parameters, induced aseismic deformation, distance sources from injection. We use data ten experiments performed at decameter scale into fault zones in limestone shale formations. observe that hydraulic similarly depend on injected...
Abstract An unusually damaging Mw 4.9 earthquake occurred on November 11, 2019 in the south east of France within lower Rhône river valley, an industrial region that hosts several operating nuclear power plants. The hypocentre this event at exceptionally shallow depth about 1 km. Here we use far-field seismological observations to demonstrate rupture properties are consistent with those commonly observed for large deeper earthquakes. In absence strong motion sensors fault vicinity, perform...
Local damage processes that have been reported for ductile and brittle macroscopic behaviours are shown here to provide a possible link between these two contrasting behaviours. Using local progressive law within linear tensorial elastic interaction model, we reproduce experimentally observed non‐linear continuously range from ductility with diffuse brittleness localised damage. The model exhibits power distributions of events in space size domains. diffuse‐localised induced ductile‐brittle...
Abstract Ten years of seismic recording allows us to locate more than 800 tremors with magnitudes ranging from 1.0 4.2, in a small (10 by 10 5 km) volume near major gas field (Lacq, France). The activity began yr after extraction began. Nearly all the epicenters are located within lateral extent field. only perturbation stress or strain fields, which has same spatial and temporal scale as seismicity, is 500-bar drop pressure due 20 exploitation, demonstrating that these events induced....
Monitoring snow avalanches is necessary in order to better understand their triggering mechanisms and ultimately improve forecast performance. Seismic monitoring has been developed by several groups over the last 20 years holds great potential detect, locate, characterize avalanches. During 2009–2010 winter, a seismic antenna was installed French Alps close village of Saint‐Christophe‐en‐Oisans (1700 m above sea level). The array seven sensors operated during 50 days October November 2009...
Proposed in the 1950's, Båth's law states that largest aftershock has a magnitude is typically 1.2 less than of mainshock. Thirty years global earthquake catalog allow us to extend time, space and focal mechanism. On average, reverse faults have smaller distance from mainshock strike‐slip faults. The distribution time intervals between mainshocks their aftershocks obeys power law, but with somewhat faster rate decay for aftershocks, general. This implies are more likely occur earlier rather...
The sizes of snow slab failure that trigger avalanches are power-law distributed. Such a probability distribution function has also been proposed to characterize different landslide types. In order understand this scaling for gravity-driven systems, we introduce two-threshold 2D cellular automaton, in which occurs irreversibly. Taking as model system, find the largest just preceding lattice system breakdown By tuning maximum value ratio two thresholds our reproduces range exponents observed...
The spatial and temporal distributions of landslides in six catalogues are analyzed order to better understand landslide triggering mechanisms. catalogs New Zealand, Yosemite (California), Grenoble (French Alps), Val d'Arly Australia, Wollongong (New South Wales, Australia). Landslides clustered time for all catalogs. For Yosemite, Wollongong, the frequency varies between 1 1000 events per day is well fitted by a power law: there no characteristic scale daily rates. When large rates known be...
The ML 5.3 Épagny earthquake that occurred on 1996 July 15 in the vicinity of Annecy (French Alps) was strongest event to shake southeastern France last 34 years. Moderate serious damage area is consistent with MSK intensities VII–VIII. This Vuache Fault, a geologically well-known, morphologically clear, NW-SE-trending strike-slip fault links southern Jura Mountains northern Subalpine chains. hypocentre located Mesozoic limestones at shallow depths (1–3 km). focal mechanism indicates...
We present experimental data of acoustic emission (AE) induced by dislocation motion during “pure” viscoplastic (ductile) deformation singlecrystals and polycrystals ice which provide opportunity to revisit collective dynamics as a critical phenomenon, recently proposed for brittle fracturing. The were recorded compression torsion creep experiments. AE statistics power law type systematically obtained under different conditions. Among the possible candidates such system with threshold...
We examine the hypothesis proposed in recent years by several authors that crust is a self‐organized critical (SOC) state. This has been suggested on basis of observation power law distributions, such as Gutenberg‐Richter for earthquakes and fault length distribution, fractal geometry sets earthquake epicenters patterns. These self‐similar properties are shared simplified models exhibiting spontaneous organization toward point characterized similar scale‐invariant properties. The term...
Using the 1973–2005 worldwide catalogues for M ≥ 4.8 seismicity and VEI 0 volcano eruptions, we find a significant, when tested against catalogue randomizations, increase of eruption onsets on earthquake day. This result emerges from stacking time series daily rates relatively to time, t , over whole catalogue. It is stronger earthquake‐volcano pairs which within ten rupture size epicenter. These results show that − are as important interaction processes 7 2–5 previously reported interact....