Passive seismic depth to bedrock data collected along the Slate River floodplain, CO, USA 2021

Using the horizontal-to-vertical spectral-ratio (HVSR) method, we inferred the depth to bedrock at the Slate River Floodplain, CO, USA. The point-scale passive seismic data were collected using Model TEP-3C Tromino seismometers over 20 min or less intervals with the instruments coupled directly to the floodplain ground surface at 42 non-flooded locations during June 2021. The ratio of horizontal-to-vertical Fourier spectra (HVSR), determined using Grilla software (MOHO, S.R.L.), along with the estimated sediment shear-wave velocity, was used to calculate the depth to the bedrock contact. This passive seismic dataset indicates that the deepest bedrock is 16 m below the surface, while the bedrock reaches the surface at the hillslope. This release contains the inferred bedrock depths based on likely shear wave velocities (Vs) intrinsic to the underlying sediment, ranging from 300 m/s to 400 m/s, listed in the processed_data subdirectory in the file 'SLAC_HVSR_June2021.csv.' The range of possible depth to bedrock interpretations is included for demonstration purposes only.

借助水平向-垂向谱比（horizontal-to-vertical spectral-ratio, HVSR）方法，我们推断了美国科罗拉多州板岩河漫滩的基岩埋深。2021年6月，我们在42个未被洪水淹没的测点处，将TEP-3C型Tromino地震仪直接耦合至漫滩地表，以不超过20分钟的采样间隔采集了点尺度被动源地震数据。借助Grilla软件（MOHO有限责任公司开发）计算得到的水平向-垂向傅里叶谱比（HVSR），结合估算的沉积物剪切波速度，我们得以计算基岩接触面的埋深。本被动源地震数据集显示，最深基岩埋深达地表以下16米，而山坡处的基岩直接出露地表。本数据集发布包包含基于地下沉积物固有剪切波速度（shear wave velocity, Vs，取值范围300 m/s至400 m/s）推算得到的基岩埋深，相关数据存储于processed_data子目录下的'SLAC_HVSR_June2021.csv'文件中。本次提供的基岩埋深解译范围仅用于演示说明。