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A contribution to seismic hazard assessment in Croatia from deterministic modeling

Some of the elements of regional seismic hazard in Croatia are assessed by computing synthetic accelerograms at a pre-determined set of sites. The input data-set consists of structural models, parameters of seismic sources, and an updated earthquake catalog. Synthetic strong-motion time series for frequencies below 1 Hz are computed on a grid of sites using the modal summation technique. The long-period hazard is described by the distribution of estimated peak values of ground displacement, velocity and acceleration, while the short-period one is represented by the map of design ground acceleration values (DGA). The highest values of DGA exceeding 0.35 g on the base-rock level are found in the southeastern coastal part of the country, in the greater Dubrovnik area.

Seismic hazard; deterministic modeling; synthetic seismograms; Croatia

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