A study on modeling S-wave velocity structure of deep basin for estimation of long-period ground motion

本文研究了在地震危险性评估中用于预测强地面运动的深部沉积层S波速结构的模拟。我们提出了一种利用地震记录中的S波的一部分来推导S波速度剖面的波形反演方法。提出了由S波部分、面波相速度、接收函数和尾波H/V谱联合反演S波速度的高精度方法。利用地震记录估计的放大因子和长期连续地震动数据的地震干涉处理得到的群速度，对模拟S波速度也是有效的。最后，通过计算地震运动与观测地震运动的比较，验证了S波速模型的正确性。

This study investigates modeling of S-wave velocity structure of deep sedimentary layers for prediction of strong ground motion in seismic hazard estimation. We proposed a waveform inversion method to deduce an S-wave velocity profile using S-wave part of earthquake records. We also proposed a joint inversion method of the S-wave part, surface-wave phase velocity, receiver function, and coda H/V spectra to S-wave velocity with high accuracy. It is also effective in modeling S-wave velocity to use amplification factors estimated from earthquake records and group velocity from seismic interferometric processing of long-term continuous microtremor data. We finally validated an S-wave velocity model with comparison between calculated and observed earthquake motion.