Nonlinear elasticity and dynamic triggering of earthquake slip

Paul JOHNSON

Los Alamos National Laboratory, USA


Do to communition over geologic time, fault blocks shearing past one another in the earth develop granular material in their core. We hypothesize that the granular physics of this material, known as ‘fault gouge’ influences much of the physics of slip. In this presentation I will describe observations and simulation of granular materials under laboratory shear conditions, including acoustic emission, shear failure and dilation.  I will discuss the primary indicators leading to failure observed in the gouge and relate these to earthquake processes. The dynamic wave experiments support widespread observations in the earth of ‘dynamic earthquake triggering’, a process whereby seismic waves from one earthquake trigger earthquakes nearby and from the triggering source.


                                                                                                                                                                                                                                               

IMAGES

Régimes dynamiques de l'injection optique (plus de détails...)

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CONFÉRENCES

International meeting in the honor of YVES COUDER, Paris, France, 2 Juin 2020

13th CHAOS 2020, Grand Hotel Adriatico, Florence, Italy , 9 Juin 2020

Dynamics Days, Nice, 24 Août 2020

Toutes les conférences...