Experimental and theoretical results of stress relaxations in a model of earthquake dynamics
Departamento de Física Fundamental,
Universidad Nacional de Educación a Distancia Avda. Senda del Rey 9, Madrid
2 Departamento de Ciencia Aplicada a la Ingeniería Técnica Agrícola Universidad Politécnica de Madrid - Ciudad Universitaria s/n, Madrid 28040, Spain
Accepted: 24 November 1999
We report on experimental and theoretical results on the dynamical behavior of propagating solitary relaxations in a model system for earthquake-like dynamics. In the experiments, a continuous elastic medium is sheared at very slow rate in between two coaxial cylinders. Solitary propagating relaxations travel at speeds that are proportional to the driving speed, though times faster, and inversely proportional to the number of solitary relaxations in the system. We show that this behavior appears due to the existence of a characteristic length scale which is the typical displacement of a surface element in a relaxation.
PACS: 05.45-a – Nonlinear dynamics and nonlinear dynamical systems / 05.65+b – Self-organized systems / 91.30.Bi – Seismic sources (mechanisms, magnitude, moment frequency spectrum)
© EDP Sciences, 2000