On the Mechanism of Laboratory Earthquake Nucleation Highlighted by Acoustic Emission.

ABSTRACT: Dynamics of granular media is the key to understanding behavior of many natural systems. In this work we concentrate on studying regularities of deformation of a gouge-filled fault. Confined granular layer - model fault - subjected to an external stress may display sudden slip owing to rearrangement of the granular layer. In nature fast slip along a fault results in an earthquake. To understand fault behavior better, we have conducted a comprehensive analysis of acoustic emission (AE) data that accompany stick-slip in granular media. Here we reveal and trace the emergence of two populations of AE. The first one is characterized by a waveform with a harsh onset, while the second one exhibits a gradual amplitude rise and a tremor-like waveform. During a regular stick-slip the statistical pro

SUBMITTER: Ostapchuk AA 

PROVIDER: S-EPMC7190713 | biostudies-literature | 2020 Apr

REPOSITORIES: biostudies-literature