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
Mélange Chaotique de Fluides à Seuil (plus de détails...)
CONFÉRENCES
Auto-organisation en physique et en biologie, morphogenèse, ondes-particules, turbulence, physique non linéaire, Colloque International en mémoire d’Yves Couder à l'ENS et UPCité, 4 Juin 2024
Physics of Wave Turbulence and beyond: Celebrating the 60th birthday of Sergey Nazarenko., Les Houches, 2 Septembre 2024
19e Journées de l'Hydrodynamique, Ecole Centrale de Nantes, 26 Novembre 2024