Distributed sensing of microseisms and teleseisms with submarine dark fibers
Authors
Williams, Ethan; Fernández Ruiz, María del Rosario; Teixeira Magalhaes, Regina Manuela; Roel, Vanthillo; Zhan, Zhongwen; [et al.]Identifiers
Permanent link (URI): http://hdl.handle.net/10017/41543DOI: 10.1038/s41467-019-13262-7
ISSN: 2041-1723
Publisher
Nature Research
Date
2019-12-18Funders
European Commission
Comunidad de Madrid
Agencia Estatal de Investigación
Ministerio de Ciencia e Innovación
Bibliographic citation
Williams, E.F., Fernández-Ruiz, M.R., Magalhaes, R. et al. Distributed sensing of microseisms and teleseisms with submarine dark fibers. Nat Commun 10, 5778 (2019)
Keywords
Ocean sciences
Optics and photonics
Solid Earth sciences
Project
info:eu-repo/grantAgreement/EC/H2020/WaterJPI-JC-2015-04/EU/Dikes and Debris Flows Monitoring by Novel Optical Fiber Sensors/DOMINO
info:eu-repo/grantAgreement/CAM//S2018%2FNMT4326/ES/Sensores e INstrumentación en tecnologías FOTÓNicas2/SINFOTON2
info:eu-repo/grantAgreement/AEI//FJCI-2016-27881
info:eu-repo/grantAgreement/MICINN//IJCI-2017-33856
Document type
info:eu-repo/semantics/article
Version
info:eu-repo/semantics/publishedVersion
Publisher's version
https://doi.org/10.1038/s41467-019-13262-7Rights
Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
Access rights
info:eu-repo/semantics/openAccess
Abstract
Sparse seismic instrumentation in the oceans limits our understanding of deep Earth dynamics and submarine earthquakes. Distributed acoustic sensing (DAS), an emerging technology that converts optical fiber to seismic sensors, allows us to leverage pre-existing submarine telecommunication cables for seismic monitoring. Here we report observations of microseism, local surface gravity waves, and a teleseismic earthquake along a 4192-sensor ocean-bottom DAS array offshore Belgium. We observe in-situ how opposing groups of ocean surface gravity waves generate double-frequency seismic Scholte waves, as described by the Longuet-Higgins theory of microseism generation. We also extract P- and S-wave phases from the 2018-08-19 Mw8.2 Fiji deep earthquake in the 0.01-1 Hz frequency band, though waveform fidelity is low at high frequencies. These results suggest significant potential of DAS in next-generation submarine seismic networks.
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