Investigating the dynamical features of the time distribution of the reservoir-induced seismicity in Enguri area (Georgia)

Telesca, I. and Matcharashvili, T. and Chelidze, T. and Zhukova, N. and Javakhishvili, Zurab (2013) Investigating the dynamical features of the time distribution of the reservoir-induced seismicity in Enguri area (Georgia). Natural Hazards. ISSN 0921-030X

[img]
Preview
Text
Telesca et al NH-2013.pdf

Download (478kB) | Preview

Abstract

We analyzed the fractal and multifractal properties of the earthquake time series occurred around the Enguri dam in West Georgia by applying the methods of detrended fluctuation analysis and multifractal detrended fluctuation analysis. We examined the interevent time series in two periods: (1) 1960–1980, in which the investigated area was characterized by the natural seismicity; and (2) 1981–2012, in which the quasiperiodic change of the reservoir water level affected the earthquake generation. Our findings show that the water level variation may influence the fractal properties of earthquake temporal distribution in the local area around the Enguri dam. In particular, it is observed that the time distribution features of seismicity occurred in the second period are more persistent than the natural seismicity occurred in the first period. Furthermore, the seismic process of the second period shows a lower multifractal degree than that of the first period, indicating that the influence of quasi-periodic fluctuation of water level features the seismicity as more regular compared to the natural seismicity.

Item Type: Article
Subjects: Q Science > Geophysics
Divisions: Institutes > Institute of Earth Sciences
Depositing User: Professor Zurab Javakhishvili
Date Deposited: 14 Apr 2015 12:37
Last Modified: 14 Apr 2015 12:37
URI: http://eprints.iliauni.edu.ge/id/eprint/2016

Actions (login required)

View Item View Item