Publications de Chiara Cornelio

Determination of Parameters Characteristic of Dynamic Weakening Mechanisms During Seismic Faulting in Cohesive Rocks

Marie Estelle Solange Violay, Chiara Cornelio, François Xavier Thibault Passelègue

While sliding at seismic slip-rates of ∼1 m/s, natural faults undergo an abrupt decrease of shear stress called dynamic weakening. Asperity-scale processes related to flash heating and weakening and, meso-scale (mm-cm) processes involving shear across the ...

AGU2022

HighSTEPS: A High Strain Temperature Pressure and Speed Apparatus to Study Earthquake Mechanics

Laurent Gastaldo, Marie Estelle Solange Violay, Chiara Cornelio, Carolina Giorgetti

2021

Mechanical behaviour of fluid lubricated faults during earthquake nucleation and propagation

Chiara Cornelio

The need for new forms of energy, and in particular the need for renewable and clean ones, led to develompment of Enanched Geothermal Systems, where the well designed stimulation of a geothermal reservoir is the key parameter for the safe development of th ...

EPFL2020

Effect of Fluid Viscosity on Earthquake Nucleation

Marie Estelle Solange Violay, Chiara Cornelio

Injection of fluids in geo-reservoirs can reduce the effective stresses at depth, lubricating the nearby faults, promoting slip and, potentially, earthquakes. High-viscous fluids are often used during hydraulic fracturing and production phases in geo-reser ...

2020

Parametric analysis of the elastohydrodynamic lubrication efficiency on induced seismicity

Marie Estelle Solange Violay, Chiara Cornelio

During reservoir stimulations, the injection of fluids with variable viscosities can trigger seismicity. Several fault lubrication mechanisms have been invoked to explain the dynamic stress drop occurring during those seismic events. Here, we perform a par ...

2020

Mechanical behaviour of fluid-lubricated faults

Marie Estelle Solange Violay, Chiara Cornelio

Fluids are pervasive in fault zones cutting the Earth's crust; however, the effect of fluid viscosity on fault mechanics is mainly conjectured by theoretical models. We present friction experiments performed on both dry and fluid-permeated silicate and car ...

Nature Research2019

Effect of water and rock composition on re-strengthening of cohesive faults during the deceleration phase of seismic slip pulses

Marie Estelle Solange Violay, Chiara Cornelio, François Xavier Thibault Passelègue

2019

Effect of fluid viscosity on fault reactivation and co‐seismic weakening

Marie Estelle Solange Violay, Chiara Cornelio, François Xavier Thibault Passelègue

High‐viscosity fluids are often used during hydraulic fracking operations in geo‐reservoirs. Here, we performed dedicated experiments to study the influence of fluid viscosity on fault reactivation and associated induced earthquakes. Experiments were condu ...

2019