Authors:M. Radulian, M. Popa, B. Grecu, E. Popescu, and G. F. Panza
AA. VV. 2000: SeismicHazard of the Circum-Pannonian Region. Pageoph Topical Volumes, Reprint from Pure and Applied Geophysics , 157, No. 1/2, G F Panza, M Radulian, C-I Trifu eds, Birkhäuser Verlag, Basel, Switzerland
Authors:G. Marmureanu, E. Popescu, M. Popa, A. I. Moldovan, A. O. Plăcintă, and M. Radulian
The seismic hazard assessment in dense-populated areas and the strategic objectives design are based on the study of seismicity of the seismogenic sources (which can have an effect at the site above a specified minimum level that is considered risky) and the attenuation between focus and site. The purpose of this paper is to provide a complete set of information required for a probabilistic assessment of the seismic hazard in the southeast Romania relative to the following seismic sources: Vrancea zone (in the crust and intermediate-depth domains), Predobrogean depression zone, Intramoesian zone and Shabla-Dulovo (Bulgaria) zone. 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).
Authors:K. Gribovszki, F. Schulek-Tóth, and P. Varga
, Szeidovitz Gy, Bus Z 2008: Seismichazard of the inner town of Budapest, Probabilistic seismichazard assessment (in Hungarian). Final Report, MTA GGKI Szeizmológiai Főosztály Archívuma, GGRI Seismological Department of HAS
J K 2000: Some Features of the Spatially Smoothed Seismicity. Proceedings of the workshop on Seismicity Modelling in SeismicHazard Mapping, Poljce, Slovenia
Some Features of the Spatially Smoothed Seismicity
Balla Z 1994: Deep Structure and seismichazard of the Gabcikovo-Nagymaros region. Manuscript, Archive of MáFI
Balla Z, Schweitzer F, Szabó Z 1993: Summary map of the ruptures and ruptured belts active in Pleistocene, M=1
A new technique is developed to perform a deterministic hazard analysis in terms of physical parameters, i.e. displacements, velocities, maximum accelerations, and civil engineering specific ones, design accelerations. The method is adapted for the specific features of the Romanian Plain seismicity including the latest theoretical results in both seismotectonic and prediction fields, and data acquisitions. The deterministic analysis is performed computing free surface synthetic seismograms corresponding to different seismic sources and structural models, for crustal and intermediate-depth events separately. The DGA (design ground acceleration) greatest values and the NS and EW components resultant for the velocities and horizontal displacements are considered as a measure for seismic hazard level.
Authors:G Marmureanu, M Androne, M Radulian, E Popescu, C O Cioflan, A O Plăcintă, I A Moldovan, and V Serban
Attenuation specific from Vrancea intermediate-depth focus toward SE is revised at length in order to re-evaluate the seismic hazard at the nuclear power plant (NPP) Cernavoda. To this aim, we took into consideration all the strong motion data available for the region and test a large range of relationship types. Since the instrumental data are limited as magnitude and depth intervals, the extrapolation based on the attenuation laws deduced from these data to great magnitudes is very instable and must be carefully considered. The extrapolation outside the characteristic domain of the available database leads to large deviations, especially at large magnitudes and for the relations which contain the depth as independent parameter.