On the Probabilistic Seismic Hazard Assessment in Kazakhstan

The presented article is relevant, as Kazakhstan is the first of the countries of the Central Asian region that has moved to the probabilistic seismic hazard assessment and seismic zoning at the regulatory level, consistent with the basic principles of Eurocodes. The methodology used is being improved in accordance with global trends and includes both domestic developments in the identification and parameterization of zones of possible earthquake sources, and the advantages of the Western engineering approach. However, the accuracy of estimates is strongly influenced by the weak development of seismological networks in Kazakhstan, poor knowledge of active faults, insufficient involvement of local specialists in significant international research projects. The current state of seismic hazard assessment in Kazakhstan is presented. The aim of the article was to highlight the developments in the country in recent years in this field of research. The stages of the probabilistic seismic hazard assessment (PSHA) development, methodological features in comparison with Central Asian countries, significance for the seismic safety of the country, the achieved level and difficulties are considered. The existing normative maps of seismic zoning based on PSHA and maps developed during current projects are characterized. The development of the modern probabilistic assessment is extremely relevant for the highly seismic areas of Kazakhstan. It is dictated by the need to update seismic design standards and the country's declared harmonization of the construction regulatory framework with the European building codes.