برآورد خطر زمينلرزه در استان مركزي

EARTHQUAKE HAZARD ANALYSIS IN THE MARKAZI PROVINCE

This paper presents an assessment of the seismic hazard for the Markazi province. For approch to this aim based on Seismotectonic conditions, regional earthquake dam and seismicity analyses the active faults and potential seismic sources of the region are identified and illustrated in a seismotectonic map. By useing different thechniques such as "Time Normalization" a model of earthquake sources has been prepared. The appropriate attenuation laws are selected and earthquake hazard analysis has been done for the province using an analysis point interval scale of 0.1x 0.1 geographical degrees. Iso-acceleration maps have been compiled afterwards for return periods of 50, 100, 200 and 500 years. Finally, a hazard macrozonation map has been compiled and presented. According to the result of this research, Markazi province could be divided into VI zones from earthquake hazard point of view. Earthquake hazard is high in north of Markazi province, medium and low in central and west