@article{fdi:010081331,
  title = {{O}n the detection capabilities of underwater distributed acoustic sensing},
  author = {{L}ior, {I}. and {S}laden, {A}. and {R}ivet, {D}. and {A}mpuero, {J}ean-{P}aul and {H}ello, {Y}ann and {B}ecerril, {C}. and {M}artins, {H}. {F}. and {L}amare, {P}. and {J}estin, {C}. and {T}sagkli, {S}. and {M}arkou, {C}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he novel technique of distributed acoustic sensing ({DAS}) holds great potential for underwater seismology by transforming standard telecommunication cables, such as those currently traversing various regions of the world's oceans, into dense arrays of seismo-acoustic sensors. {T}o harness these measurements for seismic monitoring, the ability to record transient ground deformations is investigated by analyzing ambient noise, earthquakes, and their associated phase velocities, on {DAS} records from three dark fibers in the {M}editerranean {S}ea. {R}ecording quality varies dramatically along the fibers and is strongly correlated with the bathymetry and the apparent phase velocities of recorded waves. {A}pparent velocities are determined for several well-recorded earthquakes and used to convert {DAS} {S}-wave strain spectra to ground motion spectra. {E}xcellent agreement is found between the spectra of nearby underwater and on-land seismometers and {DAS} converted spectra, when the latter are corrected for site effects. {A}pparent velocities greatly affect the ability to detect seismic deformations: for the same ground motions, slower waves induce higher strains and thus are more favorably detected than fast waves. {T}he effect of apparent velocity on the ability to detect seismic phases, quantified by expected signal-to-noise ratios, is investigated by comparing signal amplitudes predicted by an earthquake model to recorded noise levels. {DAS} detection capabilities on underwater fibers are found to be similar to those of nearby broadband sensors, and superior to those of on-land fiber segments, owing to lower velocities at the ocean-bottom. {T}he results demonstrate the great potential of underwater {DAS} for seismic monitoring and earthquake early warning.},
  keywords = {ambient noise ; distributed acoustic sensing ; earthquake seismology ; ocean bottom seismology ; signal to noise ; strain measurements ; {GRECE} ; {FRANCE} ; {METHONI} ; {TOULON}},
  booktitle = {},
  journal = {{J}ournal of {G}eophysical {R}esearch : {S}olid {E}arth},
  volume = {126},
  numero = {3},
  pages = {e2020{JB}020925 [20 ]},
  ISSN = {2169-9313},
  year = {2021},
  DOI = {10.1029/2020jb020925},
  URL = {https://www.documentation.ird.fr/hor/fdi:010081331},
}