@article{PAR00022967,
  title = {{G}eodetic observations of shallow creep on the {L}aohushan-{H}aiyuan fault, {N}ortheastern {T}ibet},
  author = {{L}i, {Y}. {C}. and {N}ocquet, {J}ean-{M}athieu and {S}han, {X}. {J}. and {S}ong, {X}. {G}.},
  editor = {},
  language = {{ENG}},
  abstract = {{W}e investigated the spatial distribution of aseismic creep on the {L}aohushan-{H}aiyuan fault using {G}lobal {P}ositioning {S}ystem ({GPS}) data (1999-2017) and {I}nterferometric {S}ynthetic {A}perture {R}adar ({I}n{SAR}) data (2003-2010). {C}omparisons among {GPS}, {I}n{SAR} line-of-sight ({LOS}) rates, and leveling show that neither leveling nor {GPS} vertical velocities can fit the vertical signal mapped into the {LOS}, implying either complicated vertical crustal deformation in northeastern {T}ibet and/or complex error structures in the {I}n{SAR} data. {T}hus, we combined horizontal {GPS} with high-pass filtered {I}n{SAR} data to produce a continuous {LOS} rate map crossing the fault. {O}ur geodetic data reveal three creep sections along the fault. {B}oth the restored {LOS} data and decomposed ascending and descending {I}n{SAR} data highlight the fact that vertical motion can cause an overestimation of creep rate; we obtained a refined creep rate of 2.5 +/- 0.4 mm/a on the {L}aohushan fault. {W}e further identified a 10 km-long, similar to 3-5 mm/a creep section (similar to 104.2 degrees {E}-104.3 degrees {E}) and a 43 km-long, similar to 1-3 mm/a creep section (similar to 105.3 degrees {E}-105.7 degrees {E}) on the western and eastern {H}aiyuan fault respectively. {B}oth are located on fault sections that ruptured during the 1920 {M} similar to 8 earthquake, suggesting that the 1920 earthquake was able to cross pre-existing creep sections or that the fault shows heterogeneous relocking after large earthquakes, with creep lasting decades on some parts of the rupture. {F}ault coupling shows a highly variable rate of slip deficit accumulation along strike, suggesting that coupling might significantly evolve during the period between two large earthquakes.},
  keywords = {aseismic creep ; earthquake potential ; fault coupling ; {GPS} and {I}n{SAR} ; {H}aiyuan fault ; {TIBET} ; {HAIYUAN} ; {LAOHUSHAN}},
  booktitle = {},
  journal = {{J}ournal of {G}eophysical {R}esearch : {S}olid {E}arth},
  volume = {126},
  numero = {6},
  pages = {e2020{JB}021576 [18 p.]},
  ISSN = {2169-9313},
  year = {2021},
  DOI = {10.1029/2020jb021576},
  URL = {https://www.documentation.ird.fr/hor/{PAR}00022967},
}