DBPapers
DOI: 10.5593/SGEM2016/B13/S05.075

PRODUCTIVITY OF AFTERSHOCK SEQUENCES AS INDICATOR OF RHEOLOGY OF GEOLOGICAL MEDIUM WITH DAMAGES

A.Konovalov
Tuesday 6 September 2016 by Libadmin2016

References: 16th International Multidisciplinary Scientific GeoConference SGEM 2016, www.sgem.org, SGEM2016 Conference Proceedings, ISBN 978-619-7105-57-5 / ISSN 1314-2704, June 28 - July 6, 2016, Book1 Vol. 3, 589-598 pp

ABSTRACT
The aftershock productivity in the modified Omori-Utsu empirical low characterizes transition from aftershock power low decay to its background rate. The results of recent laboratory experiments, field observations and numerical modeling lead to associate the aftershock duration time with rheology behaviors. It plays an important role in the investigation of failure nucleation and postseismic relaxation. Theoretical foundation of aftershock activity power low decay is obtained using the damage rheology model, derived by V.Lyakhovsky. In the framework of this model the analytical solution for the postseismic rate of local microcrack density in a rock volume was obtained. The aftershock rate follows an exponential function of time comparable with the generalized Omori-Utsu empirical law modified by R.Shcherbakov, in which the aftershock productivity is scaling with the lower magnitude cutoff and the mainshock magnitude. New approach of calculation of empirical constants in Omori-Utsu power low was developing in this study.

Keywords: aftershock sequences, aftershock productivity, damage rheology model, Omori-Utsu empirical low.