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Passive multichannel analysis of surface waves using 1D and 2D receiver arrays
Geophysics ( IF 3.3 ) Pub Date : 2021-09-23 , DOI: 10.1190/geo2020-0104.1
Sarah L. Morton 1 , Julian Ivanov 1 , Shelby L. Peterie 1 , Richard D. Miller 1 , Amanda J. Livers-Douglas 2
Affiliation  

We use the seismic multichannel analysis of surface waves (MASW) method, which originally used active sources (i.e., controlled by users), to present a new alternative technique for surface-wave analysis of passive data (i.e., seismic sources not controlled by users). Our passive MASW technique uses two types of receiver arrays, 1D and 2D, for two different purposes. The 2D square array is used for assessing the number and directionality of passive seismic sources to help identify optimal time window(s) when such sources are of sufficient quality and aligned with the 1D receiver spread. Then, these time windows are used to selectively extract passive seismic data recorded by the 1D receiver spread for subsequent MASW analysis. In such a manner, this hybrid 1D–2D passive MASW approach can approximate the higher quality advantages of the active MASW method. This technique is successfully applied at a test site in southcentral Kansas taking advantage of train energy as the passive sources monitoring and assessing the potential development of vertically migrating voids that could endanger groundwater and infrastructure. The 1D–2D passive MASW method has proven beneficial for optimizing passive-data dispersion patterns and accurately assessing relative velocities for investigations with reduced labor costs and minimal added processing time and can be considered as a contribution to the surface-wave analysis tools.

中文翻译:

使用一维和二维接收器阵列对表面波进行无源多通道分析

我们使用最初使用主动源(即由用户控制)的地震多道面波分析(MASW)方法,提出了一种新的替代技术,用于被动数据(即不受用户控制的地震源)的面波分析。 )。我们的无源 MASW 技术使用两种类型的接收器阵列,一维和二维,用于两个不同的目的。二维方阵用于评估无源地震源的数量和方向性,以在此类源具有足够的质量并与一维接收器扩展对齐时帮助确定最佳时间窗口。然后,这些时间窗口用于选择性地提取由一维接收器扩展记录的被动地震数据,用于后续的 MASW 分析。以这样的方式,这种混合 1D-2D 无源 MASW 方法可以近似于有源 MASW 方法的更高质量优势。该技术在堪萨斯州中南部的一个试验场成功应用,利用列车能源作为被动源监测和评估可能危及地下水和基础设施的垂直迁移空隙的潜在发展。一维-二维无源 MASW 方法已被证明有利于优化无源数据分散模式和准确评估调查的相对速度,同时减少劳动力成本和最少的增加处理时间,可被视为对表面波分析工具的贡献。该技术在堪萨斯州中南部的一个试验场成功应用,利用列车能源作为被动源监测和评估可能危及地下水和基础设施的垂直迁移空隙的潜在发展。一维-二维无源 MASW 方法已被证明有利于优化无源数据分散模式和准确评估调查的相对速度,同时减少劳动力成本和最少的增加处理时间,可被视为对表面波分析工具的贡献。该技术在堪萨斯州中南部的一个试验场成功应用,利用列车能源作为被动源监测和评估可能危及地下水和基础设施的垂直迁移空隙的潜在发展。一维-二维无源 MASW 方法已被证明有利于优化无源数据分散模式和准确评估调查的相对速度,同时减少劳动力成本和最少的增加处理时间,可被视为对表面波分析工具的贡献。
更新日期:2021-09-24
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