@article{fdi:010082058,
  title = {{L}aboratory landquakes : insights from experiments into the high-frequency seismic signal generated by geophysical granular flows},
  author = {{A}rran, {M}. {I}. and {M}angeney, {A}. and {D}e {R}osny, {J}. and {F}arin, {M}. and {T}oussaint, {R}. and {R}oche, {O}livier},
  editor = {},
  language = {{ENG}},
  abstract = {{G}eophysical granular flows exert basal forces that generate seismic signals, which can be used to better monitor and model these severe natural hazards. {A} number of empirical relations and existing models link these signals' high-frequency components to a variety of flow properties, many of which are inaccessible by other analyses. {H}owever, the range of validity of the empirical relations remains unclear and the models lack validation, owing to the difficulty of adequately controlling and instrumenting field-scale flows. {H}ere, we present laboratory experiments investigating the normal forces exerted on a basal plate by dense and partially dense flows of spherical glass particles. {W}e measured the power spectra of these forces and inferred predictions for these power spectra from the models for debris flows' seismic signals proposed by {K}ean et al. (2015, ), {L}ai et al. (2018, ), and {F}arin, {T}sai, et al. (2019, ), using {H}ertz theory to extend {F}arin, {T}sai, et al. (2019)'s models to higher frequencies. {C}omparison of our observations to these predictions, and to predictions derived from {B}achelet (2018) and {B}achelet et al. (2021)'s model for granular flows' seismic signals, shows those of {F}arin, {T}sai, et al. (2019)'s "thin-flow" model to be the most accurate, so we examine explanations for this accuracy and discuss its implications for geophysical flows' seismic signals. {W}e also consider the normalization, by the mean force exerted by each flow, of the force's mean squared fluctuations, showing that this ratio varies by 4 orders of magnitude over our experiments, but is determined by the bulk inertial number of the flow.},
  keywords = {environmental seismology ; laboratory experiments ; landslides ; theory},
  booktitle = {},
  journal = {{J}ournal of {G}eophysical {R}esearch : {E}arth {S}urface},
  volume = {126},
  numero = {5},
  pages = {e2021{JF}006172 [25 p.]},
  ISSN = {2169-9003},
  year = {2021},
  DOI = {10.1029/2021jf006172},
  URL = {https://www.documentation.ird.fr/hor/fdi:010082058},
}