1887

Abstract

Summary

We analysed passive records of distributed acoustic sensing on an existing submarine fiber-optic cable in the Dutch North Sea. We find that strong Scholte waves are present in the 0.5–3 Hz frequency range and that their velocity dispersion characteristics can be used to infer shallow shear-wave velocity profiles along the cable, providing in particular a cost-efficient technology for shallow geotechnical characterization. The retrieval of virtual shots containing the Scholte waves and the computation of dispersion images are key in this process. We study how the quality of the virtual shots and of the dispersion images depend on data selection parameters. We find in particular that the quality of the virtual shots vary noticeably when considering different time periods, even just few hours apart. This suggests that adopting a selective approach during the cross-correlation and stacking process allows to obtain more accurate virtual shots and so better dispersion images for subsequent inversion to shear-wave velocity profiles.

Loading

Article metrics loading...

/content/papers/10.3997/2214-4609.2025101203
2025-06-02
2026-02-08
Loading full text...

Full text loading...

References

  1. Bachrah, R., Sayed, A., Clementi, M., Skorinski, D., Raknes, E. and Ivanov, Y. [2024] Sholte-Wave interferometry using passive surface distributed acoustic sensing (S-DAS) with application for CCS monitoring, 85th EAGE annual conference and exhibition.
    [Google Scholar]
  2. Paap, B., Vandeweijer, V., Van Wees, J. D. and Kraaijpoel, D. [2025] Leveraging Distributed Acoustic Sensing for monitoring vessels using submarine fiber optic cables, Applied Ocean Research, In press.
    [Google Scholar]
  3. Park, C. B., Miller, R.D. and Xia, J. [1998] Imaging dispersion curves of surface waves on multichannel record, 68th Annual International meeting society of exploration geophysicists, Expanded Abstracts, 1377–1380.
    [Google Scholar]
  4. Williams, E.F., Fernández-Ruiz, M.R., Magalhaes, R., Vanthillo, R., Zhan, Z., González-Herráez, M. and MartinsH.F. [2019] Distributed sensing of microseisms and teleseisms with submarine dark fibers. Nat Commun10, 5778.
    [Google Scholar]
  5. Williams, E.F., Fernández-Ruiz, M.R., Magalhaes, R., Vanthillo, R., Zhan, Z., González-Herráez, M. and MartinsH.F. [2021] Sholte wave inversion and passive source imaging with ocean-bottom DAS, The Leading Edge, 40, 576–583.
    [Google Scholar]
/content/papers/10.3997/2214-4609.2025101203
Loading
/content/papers/10.3997/2214-4609.2025101203
Loading

Data & Media loading...

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error