Investigation of Site Response Analyses of the Ezgeleh - Sarpol-e Zahab Earthquake, Iran, in West of Sarpol-e Zahab Town

In this paper, the site conditions of the western parts of Sarpol-e Zahab were studied for their impact on the seismic waves of the Ezgeleh - Sarpol-e Zahab earthquake, which occurred on November 12, 2017. The aforementioned earthquake resulted in widespread damage in the town, particularly in its south-west parts. Although the first assumptions focused on construction issues or design weaknesses related to the buildings, the site effects should not be underestimated. Site effects are widely recognized as an important factor of seismic risk. Subsurface geotechnical and geophysical data in four different sites in the town fromthe north to the south of the western parts have been obtained, and used to estimate the local site condition on earthquake ground motion in the area. The ground response analyses have been conducted considering the nonlinear behavior of the soil deposits using equivalent linear approach. Fromthe results of this study, it was determined that the reason for the increase of destruction from North to the South parts of the region was the amplification of seismic waves.