@article{fdi:010082191,
  title = {{S}train to ground motion conversion of distributed acoustic sensing data for earthquake magnitude and stress drop determination},
  author = {{L}ior, {I}. and {S}laden, {A}. and {M}ercerat, {D}. and {A}mpuero, {J}ean-{P}aul and {R}ivet, {D}. and {S}ambolian, {S}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he use of distributed acoustic sensing ({DAS}) presents unique advantages for earthquake monitoring compared with standard seismic networks: spatially dense measurements adapted for harsh environments and designed for remote operation. {H}owever, the ability to determine earthquake source parameters using {DAS} is yet to be fully established. {I}n particular, resolving the magnitude and stress drop is a fundamental objective for seismic monitoring and earthquake early warning. {T}o apply existing methods for source parameter estimation to {DAS} signals, they must first be converted from strain to ground motions. {T}his conversion can be achieved using the waves' apparent phase velocity, which varies for different seismic phases ranging from fast body waves to slow surface and scattered waves. {T}o facilitate this conversion and improve its reliability, an algorithm for slowness determination is presented, based on the local slant-stack transform. {T}his approach yields a unique slowness value at each time instance of a {DAS} time series. {T}he ability to convert strain-rate signals to ground accelerations is validated using simulated data and applied to several earthquakes recorded by dark fibers of three ocean-bottom telecommunication cables in the {M}editerranean {S}ea. {T}he conversion emphasizes fast body waves compared to slow scattered waves and ambient noise and is robust even in the presence of correlated noise and varying wave propagation directions. {G}ood agreement is found between source parameters determined using converted {DAS} waveforms and on-land seismometers for both {P} and {S} wave records. {T}he demonstrated ability to resolve source parameters using {P} waves on horizontal ocean-bottom fibers is key for the implementation of {DAS}-based earthquake early warning, which will significantly improve hazard mitigation capabilities for offshore earthquakes, including those capable of generating tsunami.},
  keywords = {},
  booktitle = {},
  journal = {{S}olid {E}arth},
  volume = {12},
  numero = {6},
  pages = {1421--1442},
  ISSN = {1869-9510},
  year = {2021},
  DOI = {10.5194/se-12-1421-2021},
  URL = {https://www.documentation.ird.fr/hor/fdi:010082191},
}