@article{fdi:010074918,
  title = {{E}arthquake early warning using future generation gravity strainmeters},
  author = {{J}uhel, {K}. and {A}mpuero, {J}ean-{P}aul and {B}arsuglia, {M}. and {B}ernard, {P}. and {C}hassande-{M}ottin, {E}. and {F}iorucci, {D}. and {H}arms, {J}. and {M}ontagner, {J}. {P}. and {V}all{\'e}e, {M}artin and {W}hiting, {B}. {F}.},
  editor = {},
  language = {{ENG}},
  abstract = {{R}ecent studies reported the observation of prompt elastogravity signals during the 2011 {M}9.1 {T}ohoku earthquake, recorded with broadband seismometers and gravimeter between the rupture onset and the arrival of the seismic waves. {H}ere we show that to extend the range of magnitudes over which the gravity perturbations can be observed and reduce the time needed for their detection, high-precision gravity strainmeters under development could be used, such as torsion bars, superconducting gradiometers, or strainmeters based on atom interferometers. {T}hese instruments measure the differential gravitational acceleration between two seismically isolated test masses and are initially designed to observe gravitational waves around 0.1{H}z. {O}ur analysis involves simulations of the expected gravity strain signals generated by fault rupture, based on an analytical model of gravity perturbations in a homogeneous half-space. {W}e show that future gravity strainmeters should be able to detect prompt gravity perturbations induced by earthquakes larger than {M}7, up to 1,000km from the earthquake centroid within {P} waves travel time and up to 120km within the first 10s of rupture onset, provided a sensitivity in gravity strain of 10(-15){H}z(-1/2) at 0.1{H}z can be achieved. {O}ur results further suggest that, in comparison to conventional {P} wave-based earthquake-early warning systems, gravity-based earthquake-early warning systems could perform faster detections of large offshore subduction earthquakes (at least larger than {M}7.3). {G}ravity strainmeters could also perform earlier magnitude estimates, within the duration of the fault rupture, and therefore complement current tsunami warning systems.},
  keywords = {},
  booktitle = {},
  journal = {{J}ournal of {G}eophysical {R}esearch : {S}olid {E}arth},
  volume = {123},
  numero = {12},
  pages = {10889--10902},
  ISSN = {2169-9313},
  year = {2018},
  DOI = {10.1029/2018jb016698},
  URL = {https://www.documentation.ird.fr/hor/fdi:010074918},
}