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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-24 23:04 |
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Conference: Bucharest University Faculty of Physics 2004 Meeting
Section: Atmosphere and Earth Science; Environment Protection
Title:
Input parameters for the statistical seismic hazard assessment in central part of Romania territory using crustal earthquakes
Authors:
A. I. Moldovan, O. Bazacliu, E. Popescu
Affiliation:
National Institute for Earth Physics, NIEP, Calugareni 12, Bucharest-Magurele, Romania
E-mail
Keywords:
statistical seismic hazard, Romanian territory
Abstract:
The seismic hazard assessment in dense-populated geographical regions and subsequently the design of the strategic objectives (dams, nuclear power plants, etc.) are based on the knowledge of the seismicity parameters of the seismogenic sources which can generate ground motion amplitudes above the minimum level considered risky at the specific site and the way the seismic waves propagate between the focus and the site. The purpose of this paper is to provide a set of information required for a probabilistic assessment of the seismic hazard in the central Romania territory relative to the following seismic sources: Fagars zone (FC), Campulung zone (CP), and Transilvania zone (TD) all of them in the crust domain. Extremely vulnerable objectives are present in the central part of Romania, including cities of Pitesti and Sibiu and the "Vidraru" dam. The analysis that we propose implies: (1) geometrical definition of the seismic sources, (2) estimation of the maximum possible magnitude, (3) estimation of the frequency – magnitude relationship and (4) estimation of the attenuations laws.
As an example, the obtained input parameters are used to evaluate the seismic hazard distribution due to the crustal earthquakes applying the McGuire’s procedure (1976). These preliminary results are in good agreement with the previous research based on deterministic approach (Radulian et al., 2000).
KEYWORDS: seismogenic sources, seismic hazard, probabilistic assessment
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