@article{fdi:010076720,
  title = {{B}ayesian dynamic finite-fault inversion : 2. {A}pplication to the 2016 {M}w 6.2 {A}matrice, {I}taly, earthquake},
  author = {{G}allovic, {F}. and {V}alentová, {L}. and {A}mpuero, {J}ean-{P}aul and {G}abriel, {A}.{A}.},
  editor = {},
  language = {{ENG}},
  abstract = {{I}n 2016 {C}entral {I}taly was struck by a sequence of three normal-faulting earthquakes with moment magnitude ({M}w) larger than 6. {T}he {M}w 6.2 {A}matrice event (24 {A}ugust) was the first one, causing building collapse and about 300 casualties. {T}he event was recorded by a uniquely dense network of seismic stations. {H}ere we perform its dynamic source inversion to infer the fault friction parameters and stress conditions that controlled the earthquake rupture. {W}e consider a linear slip-weakening friction law with spatially variable parameters along the fault. {T}he inversion uses a novel {B}ayesian framework developed in our companion paper, which combines efficient finite-difference dynamic rupture simulations and the {P}arallel {T}empering {M}onte {C}arlo algorithm to sample the posterior probability density function. {T}he main advantage of such formulation is that by subsequent analysis of the posterior samples we can infer stable features of the result and their uncertainty. {T}he inversion results in a million of visited models. {T}he preferred model ensemble reveals intriguing dynamic features. {T}he rupture exhibits a slow and irregular nucleation followed by bilateral rupture propagation through two asperities, accelerating toward the heavily damaged city of {A}matrice. {T}he stress drop reaches locally 10-15 {MP}a, with slip-weighted mean of 4-4.5 {MP}a. {T}he friction drop ranges from 0.1 to 0.4. {T}he characteristic slip-weakening distance is the most heterogeneously distributed dynamic parameter, with values of 0.2-0.8 m. {T}he radiation efficiency was rather low, 0.2, suggesting that approximately 80% of the total available energy was spent in the fracture process, while just 20% was radiated by seismic waves.},
  keywords = {{ITALIE}},
  booktitle = {},
  journal = {{J}ournal of {G}eophysical {R}esearch : {S}olid {E}arth},
  volume = {124},
  numero = {7},
  pages = {6970--6988},
  ISSN = {2169-9356},
  year = {2019},
  DOI = {10.1029/2019{JB}017512},
  URL = {https://www.documentation.ird.fr/hor/fdi:010076720},
}