Attenuation of the peak ground motion for the special case of Vrancea intermediate-depth earthquakes and seismic hazard assessment at NPP Cernavoda

Marmureanu, G and Androne, M and Radulian, M and Popescu, E and Cioflan, C O and Plăcintă, A O and Moldovan, I A and Serban, V (2006) Attenuation of the peak ground motion for the special case of Vrancea intermediate-depth earthquakes and seismic hazard assessment at NPP Cernavoda. Acta Geodaetica et Geophysica Hungarica, 41 (3-4). pp. 433-440. ISSN 1217-8977

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Abstract

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.

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