Utilizing distributed acoustic sensing and ocean bottom fiber optic cables for submarine structural characterization

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dc.citation.articleNumber5613en_US
dc.citation.journalTitleScientific Reportsen_US
dc.citation.volumeNumber11en_US
dc.contributor.authorCheng, Fengen_US
dc.contributor.authorChi, Benxinen_US
dc.contributor.authorLindsey, Nathaniel J.en_US
dc.contributor.authorDawe, T. Craigen_US
dc.contributor.authorAjo-Franklin, Jonathan B.en_US
dc.date.accessioned2021-04-21T15:46:28Zen_US
dc.date.available2021-04-21T15:46:28Zen_US
dc.date.issued2021en_US
dc.description.abstractThe sparsity of permanent seismic instrumentation in marine environments often limits the availability of subsea information on geohazards, including active fault systems, in both time and space. One sensing resource that provides observational access to the seafloor environment are existing networks of ocean bottom fiber optic cables; these cables, coupled to modern distributed acoustic sensing (DAS) systems, can provide dense arrays of broadband seismic observations capable of recording both seismic events and the ambient noise wavefield. Here, we report a marine DAS application which demonstrates the strength and limitation of this new technique on submarine structural characterization. Based on ambient noise DAS records on a 20 km section of a fiber optic cable offshore of Moss Landing, CA, in Monterey Bay, we extract Scholte waves from DAS ambient noise records using interferometry techniques and invert the resulting multimodal dispersion curves to recover a high resolution 2D shear-wave velocity image of the near seafloor sediments. We show for the first time that the migration of coherently scattered Scholte waves observed on DAS records can provide an approach for resolving sharp lateral contrasts in subsurface properties, particularly shallow faults and depositional features near the seafloor. Our results provide improved constraints on shallow submarine features in Monterey Bay, including fault zones and paleo-channel deposits, thus highlighting one of many possible geophysical uses of the marine cable network.en_US
dc.identifier.citationCheng, Feng, Chi, Benxin, Lindsey, Nathaniel J., et al.. "Utilizing distributed acoustic sensing and ocean bottom fiber optic cables for submarine structural characterization." <i>Scientific Reports,</i> 11, (2021) Springer Nature: https://doi.org/10.1038/s41598-021-84845-y.en_US
dc.identifier.digitals41598-021-84845-yen_US
dc.identifier.doihttps://doi.org/10.1038/s41598-021-84845-yen_US
dc.identifier.urihttps://hdl.handle.net/1911/110310en_US
dc.language.isoengen_US
dc.publisherSpringer Natureen_US
dc.rightsThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder.en_US
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en_US
dc.titleUtilizing distributed acoustic sensing and ocean bottom fiber optic cables for submarine structural characterizationen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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