@article{fdi:010076719,
  title = {{B}ayesian dynamic finite-fault inversion : 1. {M}ethod and synthetic test},
  author = {{G}allovic, {F}. and {V}alentová, {L}. and {A}mpuero, {J}ean-{P}aul and {G}abriel, {A}.{A}.},
  editor = {},
  language = {{ENG}},
  abstract = {{D}ynamic earthquake source inversions aim to determine the spatial distribution of initial stress and friction parameters leading to dynamic rupture models that reproduce observed ground motion data. {S}uch inversions are challenging, particularly due to their high computational burden; thus, so far, only few attempts have been made. {U}sing a highly efficient rupture simulation code, we introduce a novel method to generate a representative sample of acceptable dynamic models from which dynamic source parameters and their uncertainties can be assessed. {T}he method assumes a linear slip-weakening friction law and spatially variable prestress, strength, and characteristic slip-weakening distance along the fault. {T}he inverse problem is formulated in a {B}ayesian framework, and the posterior probability density function is sampled using the {P}arallel {T}empering {M}onte {C}arlo algorithm. {T}he forward solver combines a 3-{D} finite difference code for dynamic rupture simulation on a simplified geometry to compute slip rates and precalculated {G}reen's functions to compute ground motions. {W}e demonstrate the performance of the proposed method on a community benchmark test for source inversion. {W}e find that the dynamic parameters are resolved well within the uncertainty, especially in areas of large slip. {T}he overall relative uncertainty of the dynamic parameters is rather large, reaching ~50% of the averaged values. {I}n contrast, the kinematic rupture parameters (rupture times, rise times, and slip values), also well resolved, have relatively lower uncertainties of ~10%. {W}e conclude that incorporating physics-based constraints, such as an adequate friction law, may serve also as an effective constraint on the rupture kinematics in finite-fault inversions.},
  keywords = {},
  booktitle = {},
  journal = {{J}ournal of {G}eophysical {R}esearch : {S}olid {E}arth},
  volume = {124},
  numero = {7},
  pages = {6949--6969},
  ISSN = {2169-9356},
  year = {2019},
  DOI = {10.1029/2019{JB}017510},
  URL = {https://www.documentation.ird.fr/hor/fdi:010076719},
}