Dynamic Site Characterization in Mexico City Following the 2017 Mw 7.1 Puebla-Mexico City Earthquake

This project contains the raw unprocessed active and passive surface wave and horizontal to vertical spectral ratio (HVSR) data collected in 25 sites located throughout Mexico City, Mexico. Surface wave and HVSR data were recorded at all the sites. In this project, each testing site folder contains the unprocessed surface wave data and the metadata file. The active surface wave data was recorded at each site using a linear array of 24, 4.5 Hz geophones with 2 m receiver spacing. Vertical geophones were used to record Rayleigh waves. A 2 m source offset was used for P-wave refraction, whereas multiple source offsets of 5, 10, 20, and 30 m were used for the multichannel analysis surface wave (MASW) data. The passive microtremor array measurements (MAM) data were recorded using circular and L-shaped arrays. The circular array MAM measurements utilized six three-component Trillium Compact, 20-second broadband seismometers. In each circular array arrangement, five seismometers were uniformly distributed on the circumference, while the sixth seismometer was placed on the center. Circular array diameters ranged from 50 m to 200 m. The L-array MAM measurements were carried out using 24, 4.5 Hz vertical geophones. An equal receiver spacing of 5 m was used. L-array dimensions ranged from 55 m x 60 m to 35 m x 80 m. The data was used to develop shear wave velocity profiles at each site. The details of the recorded data are provided in the metadata files for each site. This data was collected as part of the NSF funded project award #1822482 and title “RAPID/Collaborative Research: Dynamic Site Characterization Following Mw 7.1 Puebla Earthquake for Development of a Refined 3D Shallow Crust Velocity Model of the Mexico City Basin”.

本项目包含在墨西哥墨西哥城全域25个站点采集的原始未处理主动与被动面波数据，以及水平-垂直谱比（HVSR）数据。所有站点均记录了面波与HVSR数据。本项目中，每个测试站点文件夹均包含未处理的面波数据及元数据文件。主动面波数据通过由24个4.5 Hz检波器组成的线性阵列采集，检波器间距为2米。使用垂直检波器记录瑞利波。P波折射采用2米震源偏移距，而多道面波分析（MASW）数据则采用5、10、20及30米的多震源偏移距。被动微震阵列测量（MAM）数据通过圆形阵列与L形阵列采集。圆形阵列MAM测量采用6台三分量Trillium Compact型20秒宽带地震仪。每个圆形阵列中，5台地震仪均匀分布于圆周，第6台置于圆心。圆形阵列直径范围为50米至200米。L形阵列MAM测量采用24个4.5 Hz垂直检波器，检波器间距均为5米。L形阵列尺寸范围为55米×60米至35米×80米。该数据用于构建各站点的剪切波速度剖面。各站点记录数据的详细信息见元数据文件。该数据是美国国家科学基金会（NSF）资助项目（编号1822482）的一部分，项目名称为"快速/协同研究：7.1级普埃布拉地震后动态场地特征分析——墨西哥城盆地精细3D浅地壳速度模型构建"。