Abstract This study is intended to investigate ambient noise recordings in form of array and single-station measurements at Sarpol-e-zahab city after the destructive Mw = 7.3 earthquake of 12 November 2017 in Kermanshah province, Iran. The ESPAC, f-k, HVTFA, and HVSR methods are applied to analyze the ambient noise and obtain useful information on three key factors of site seismic properties, i.e. the geometry of ground layers, their mechanical characteristics and site resonance frequencies. The results of this study are presented as maps of the fundamental frequency of the ground, depth of bedrock, the thickness of top cover materials, as well as the average shear wave velocity (Vs)700 and (Vs)30 for Sarpol-e-zahab. The analyses show that the single value of (Vs)30 does not represent seismic ground response, and the depth of competent bedrock, which dominates the low-frequency seismic response amplifications is located far beyond 30 m in this city. The most effective grade II seismic microzonation of Sarpol-e-zahab is provided by combining the results of these analyses.

中文翻译：

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2017 年伊朗 Mw 7.3 地震后 sarpol-e-zahab 地震微带的综合环境噪声分析

摘要 本研究旨在调查 2017 年 11 月 12 日伊朗克尔曼沙阿省发生破坏性 Mw = 7.3 地震后 Sarpol-e-zahab 市以阵列和单站测量形式记录的环境噪声记录。ESPAC、fk、HVTFA 和HVSR 方法用于分析环境噪声并获得关于场地地震特性的三个关键因素的有用信息，即地层的几何形状、它们的力学特性和场地共振频率。这项研究的结果以地面基频、基岩深度、顶盖材料厚度以及平均剪切波速度 (Vs)700 和 (Vs)30 的形式呈现在 Sarpol-e-扎哈布 分析表明，(Vs)30 的单一值不代表地震地面响应，以及合格基岩的深度，占主导地位的低频地震响应放大位于该城市的 30 m 以外。Sarpol-e-zahab 最有效的 II 级地震微分区是通过结合这些分析的结果提供的。