Advances in Distributed Fiber-Optic Sensing for Monitoring Marine Infrastructure, Measuring the Deep Ocean, and Quantifying the Risks Posed by Seafloor Hazards

Hartog, Arthur H.; Belal, Mohammad; Clare, Michael

doi:10.4031/mtsj.52.5.7

Cited by 39 publications

(20 citation statements)

References 77 publications

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“…In addition, weak coupling between the cable and the poorly consolidated sediments on the seafloor may prevent accurate recording of seismic waves. Notwithstanding strong expectations 15 and one reported earthquake detection 16 , the performance of DAS on submarine telecom cables remains to be evaluated to better define its range of possible applications.…”

Section: Introductionmentioning

confidence: 99%

Distributed sensing of earthquakes and ocean-solid Earth interactions on seafloor telecom cables

et al. 2019

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Two thirds of the surface of our planet are covered by water and are still poorly instrumented, which has prevented the earth science community from addressing numerous key scientific questions. The potential to leverage the existing fiber optic seafloor telecom cables that criss-cross the oceans, by using them as dense arrays of seismo-acoustic sensors, remains to be evaluated. Here, we report Distributed Acoustic Sensing measurements on a 41.5 km-long telecom cable that is deployed offshore Toulon, France. Our observations demonstrate the capability to monitor with unprecedented details the ocean-solid earth interactions from the coast to the abyssal plain, in addition to regional seismicity (e.g., a magnitude 1.9 micro-earthquake located 100 km away) with signal characteristics comparable to those of a coastal seismic station.

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Section: Introductionmentioning

confidence: 99%

Distributed sensing of earthquakes and ocean-solid Earth interactions on seafloor telecom cables

et al. 2019

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“…Other developments in distributed sensing along fibre-optic cables also demonstrate the potential utility of cabled submarine links, such as those that connect the Fraser Delta Dynamics Laboratory to the VENUS seafloor cabled network, to measure strain, temperature and to use the optical fibres as distributed acoustic sensors (e.g. Lindsey et al, 2017Lindsey et al, , 2019Hartog et al, 2018).…”

Section: Conclusion and Final Thoughtsmentioning

confidence: 99%

Lessons learned from the monitoring of turbidity currents and guidance for future platform designs

Clare

Lintern

Rosenberger³

et al. 2020

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Turbidity currents transport globally significant volumes of sediment and organic carbon into the deep-sea and pose a hazard to critical infrastructure. Despite advances in technology, their powerful nature often damages expensive instruments placed in their path. These challenges mean that turbidity currents have only been measured in a few locations worldwide, in relatively shallow water depths (<<2 km). Here, we share lessons from recent field deployments about how to design the platforms on which instruments are deployed. First, we show how monitoring platforms have been affected by turbidity currents including instability, displacement, tumbling and damage. Second, we relate these issues to specifics of the platform design, such as exposure of large surface area instruments within a flow and inadequate anchoring or seafloor support. Third, we provide recommended improvements to improve design by simplifying mooring configurations, minimising surface area, and enhancing seafloor stability. Finally we highlight novel multi-point moorings that avoid interaction between the instruments and the flow, and flow-resilient seafloor platforms with innovative engineering design features, such as ejectable feet and ballast. Our experience will provide guidance for future deployments, so that more detailed insights can be provided into turbidity current behaviour, and in a wider range of settings.

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“…Urlaub et al, 2018), and novel use of fibre-optic cables to monitor ground accelerations (e.g. Hartog et al, 2018). In the future, it is hoped that these proven new technologies, and other emerging systems, will provide early warning systems to reduce the risk posed to coastal communities and increase the resilience of critical seafloor infrastructure.…”

Section: Perspectives For the Futurementioning

confidence: 99%

Subaqueous mass movements in the context of observations of contemporary slope failure

Mountjoy

Georgiopoulou

Chaytor

et al. 2020

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The manuscript will undergo copyediting, typesetting and correction before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the book series pertain. Although reasonable efforts have been made to obtain all necessary permissions from third parties to include their copyrighted content within this article, their full citation and copyright line may not be present in this Accepted Manuscript version. Before using any content from this article, please refer to the Version of Record once published for full citation and copyright details, as permissions may be required.

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Advances in Distributed Fiber-Optic Sensing for Monitoring Marine Infrastructure, Measuring the Deep Ocean, and Quantifying the Risks Posed by Seafloor Hazards

Cited by 39 publications

References 77 publications

Distributed sensing of earthquakes and ocean-solid Earth interactions on seafloor telecom cables

Distributed sensing of earthquakes and ocean-solid Earth interactions on seafloor telecom cables

Lessons learned from the monitoring of turbidity currents and guidance for future platform designs

Subaqueous mass movements in the context of observations of contemporary slope failure

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