Quantitative comparison of active and passive surface wave data obtained from distributed acoustic sensing (DAS) and three-component geophones

Abstract

PreviousNext No AccessSecond International Meeting for Applied Geoscience & EnergyQuantitative comparison of active and passive surface wave data obtained from distributed acoustic sensing (DAS) and three-component geophonesAuthors: Koichi HayashiHayato NonakaPeter HubbardYasuhiro YokotaKensuke DateKazuhiko MasumotoTaka’aki TairaKenichi SogaKoichi HayashiGeometrics/OYO CorporationSearch for more papers by this author, Hayato Nonaka Kajima CorporationSearch for more papers by this author, Peter Hubbard University of California BerkeleySearch for more papers by this author, Yasuhiro Yokota Kajima CorporationSearch for more papers by this author, Kensuke Date Kajima CorporationSearch for more papers by this author, Kazuhiko Masumoto Kajima CorporationSearch for more papers by this author, Taka’aki Taira University of California BerkeleySearch for more papers by this author, and Kenichi Soga University of California BerkeleySearch for more papers by this authorhttps://doi.org/10.1190/image2022-3738106.1 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail AbstractWe carried out comparative data acquisition of active and passive surface wave methods using distributed acoustic sensing (DAS) and three-component velocity meters (geophone) at a research field located in Richmond, California, U.S. Several different fiber optic sensor cables were deployed at several different depths in a trench of 100 m length. Three component geophones were deployed on the ground surface along the trench with 2 m spacing. A sledge hammer was used for active data acquisition. Seismic ambient noises were also recorded over several days for passive measurements. Active seismic data obtained from geophone was converted to strain time histories and quantitatively compared with DAS data. The strain time history obtained from DAS agreed very well with those obtained from the 2 Hz geophones. We compared dispersion curves of active and passive surface wave data obtained from DAS and geophones based on a multichannel analysis of surface waves (MASW) and a spatial autocorrelation (SPAC). Dispersion curves obtained from DAS are reasonably consistent with those obtained from the radial component of geophones in a frequency range between 4 and 35 Hz in active data and 2 and 20 Hz in passive data. Processing results of passive measurements demonstrated that a low sensitivity cable used for telecommunication, and a cable on the ground surface loosely covered with soil, provided consistent dispersion curves with geophones. The results imply that DAS can be applied to various types of geotechnical monitoring.Keywords: surface wave method, distributed acoustic sensing, engineering, near surface, S-wave velocityPermalink: https://doi.org/10.1190/image2022-3738106.1FiguresReferencesRelatedDetails Second International Meeting for Applied Geoscience & EnergyISSN (print):1052-3812 ISSN (online):1949-4645Copyright: 2022 Pages: 3694 publication data© 2022 Published in electronic format with permission by the Society of Exploration Geophysicists and the American Association of Petroleum GeologistsPublisher:Society of Exploration Geophysicists HistoryPublished Online: 15 Aug 2022 CITATION INFORMATION Koichi Hayashi, Hayato Nonaka, Peter Hubbard, Yasuhiro Yokota, Kensuke Date, Kazuhiko Masumoto, Taka’aki Taira, and Kenichi Soga, (2022), "Quantitative comparison of active and passive surface wave data obtained from distributed acoustic sensing (DAS) and three-component geophones," SEG Technical Program Expanded Abstracts : 642-646. https://doi.org/10.1190/image2022-3738106.1 Plain-Language Summary Keywordssurface wave methoddistributed acoustic sensingengineeringnear surfaceS-wave velocityPDF DownloadLoading ...