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首页> 外文期刊>Bulletin of the Seismological Society of America >Estimating Site Response with Recordings from Deep Boreholes and HVSR: Examples from the Mississippi Embayment of the Central United States
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Estimating Site Response with Recordings from Deep Boreholes and HVSR: Examples from the Mississippi Embayment of the Central United States

机译：借鉴深层钻孔和HVSR的录音估算网站响应：来自美国中部密西西比州的实例

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摘要

Recordings of weak-motion S waves at two deep vertical seismic arrays in the northern Mississippi embayment (i.e., vertical seismic array Paducah [VSAP] and the Central United States Seismic Observatory [CUSSO]) were used to estimate empirical site responses using ratios of surface-to-bedrock transverse-component amplitude spectra TFT. The mean TFT curves were also compared with theoretical transfer functions derived from Thomson-Haskell propagator matrices. The results were comparable, indicating that mean spectral ratios, calculated from few (10) events at local and regional distances, represent empirical linear S-wave transfer functions for weak-motion SH waves at these sites. At both sites, the largest amplifications implied by the theoretical responses and the observed S-wave spectral ratios occur at frequencies higher than the sites' fundamental frequencies.
机译：在密西西比湾北部的两个深垂直地震阵列（即垂直地震阵列Paducah[VSAP]和美国中部地震观测台[CUSSO]）上，利用弱运动S波记录，利用地表与基岩横向分量振幅谱TFT的比率，估算经验场地响应。还将平均TFT曲线与从Thomson-Haskell传播子矩阵导出的理论传递函数进行了比较。结果具有可比性，表明从局部和区域距离的少数（10）个事件计算的平均谱比代表了这些地点弱运动SH波的经验线性S波传递函数。在这两个地点，理论响应和观测到的S波频谱比所暗示的最大放大发生在高于地点基频的频率。

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