DBPapers
DOI: 10.5593/SGEM2015/B13/S5.134

THE ASSESSMENT OF SEISMIC NETWORKS DISTRIBUTION FROM A RISK ANALYSIS PERSPECTIVE. ROMANIA CASE STUDY.

D. Toma-Danila, C.O. Cioflan, S.F. Balan, B.F. Apostol
Friday 7 August 2015 by Libadmin2015

References: 15th International Multidisciplinary Scientific GeoConference SGEM 2015, www.sgem.org, SGEM2015 Conference Proceedings, ISBN 978-619-7105-33-9 / ISSN 1314-2704, June 18-24, 2015, Book1 Vol. 3, 1035-1042 pp

ABSTRACT
Seismic stations are fundamental components in the analysis of earthquakes; they help us understand both the phenomenon and its effects on an ever complex society. Seismic recordings highly contribute to risk mitigation, through hazard analysis or influence on seismic codes, however the more we study these recordings and new data, the more we see limitations in our understanding. An ideal case would involve a very dense network of stations in inhabited areas, but in reality a prioritization must be made, due to the high costs associated and other restrictions.
Through this study we tackle the prioritization problem differently than before; we propose a methodology that combines both data regarding risk estimates and characteristics of seismic stations within a network, in order to generate an index to describe the need of seismic monitoring, for areas that present social interest.
The methodology relies on a weighting scheme applied to spatial datasets referring to aspects like: distance of inhabited place to seismic stations, seismic station’s quality, estimated number of damaged buildings and uncertainties. The resulted index, when represented on a map, shows features like: hotspots – areas where, due to high uncertainties and important loss estimates there is a need of seismic stations; well-instrumented sites.
We apply the methodology to the Romanian Seismic Network, therefore providing future development recommendations. The recently installed Near Real-Time System for Estimating the Seismic Damage in Romania is used, with relevant scenarios of major earthquakes, in order to provide loss estimates for buildings. Results are plotted on relevant maps and significant conclusions are presented.

Keywords: seismic, network assessment, risk, Romania