TY - JOUR ID - 240631 TI - Probabilistic Assessment of PGA and UHS for Bojnurd city, the Capital of North Khorasan Province, Iran JO - Journal of Seismology and Earthquake Engineering JA - JSEE LA - en SN - 1735-1669 AU - Rahgozar, Mohammad Ali AU - Ghodrati Amiri, Gholamreza AU - Saleh, Mansour AD - University of Isfahan AD - Iran University of Science & Technology AD - Azad University, Shahrekord Branch Y1 - 2012 PY - 2012 VL - 14 IS - 1 SP - 13 EP - 28 KW - Probabilistic Seismic Hazard Assessment KW - Seismicity Parameters KW - Peak Ground Acceleration KW - Uniform Hazard Spectra KW - Bojnurd KW - Iran DO - N2 - Probabilistic seismic hazard assessment (PSHA) of horizontal peak ground acceleration (PGA) and Uniform Hazard Spectra (UHS) on bedrock for different hazard levels is conducted in this study for Bojnurd city, the capital of North Khorasan province, Iran. Therefore, all historical and instrumental earthquakes in a radius of 200 km of the center of Bojnurd city are gathered and after elimination of the aftershocks and foreshocks, the main earthquakes are identified in order to calculate the seismic parameters by Kijko (2000) method. The seismotectonic model of the considered region and the seismic sources of the region have been modeled. Bojnurd city and its vicinity are meshed by 8 vertical and 11 horizontal lines. PGAs and UHS are calculated for all 88 points of the mesh using the logic tree method and different attenuation relationships with different weighted coefficients. These calculations are performed for two hazard levels of 10% and 2% probability of being exceeded in 50 years (hazard levels 1 and 2 respectively). Regional seismic hazard maps for PGAs and UHS for different locations of Bojnurd city and its vicinity are provided. UR - http://www.jsee.ir/article_240631.html L1 - http://www.jsee.ir/article_240631_891517e1fccf237f9c834fc62088309e.pdf ER -