Detecting long-lasting transients of earthquake activity on a fault system by monitoring apparent stress, ground motion and clustering.

ABSTRACT: Damaging earthquakes result from the evolution of stress in the brittle upper-crust, but the understanding of the mechanics of faulting cannot be achieved by only studying the large ones, which are rare. Considering a fault as a complex system, microearthquakes allow to set a benchmark in the system evolution. Here, we investigate the possibility to detect when a fault system starts deviating from a predefined benchmark behavior by monitoring the temporal and spatial variability of different micro-and-small magnitude earthquakes properties. We follow the temporal evolution of the apparent stress and of the event-specific residuals of ground shaking. Temporal and spatial clustering properties of microearthquakes are monitored as well. We focus on a fault system located in Southern Italy, wh

SUBMITTER: Picozzi M 

PROVIDER: S-EPMC6838128 | biostudies-literature | 2019 Nov

REPOSITORIES: biostudies-literature