@article{PAR00011167,
  title = {{A}ssessment of {SCARDEC} source parameters of global large ({M}-w >= 7.5) subduction earthquakes},
  author = {{L}entas, {K}. and {F}erreira, {A}. {M}. {G}. and {V}all{\'e}e, {M}artin},
  editor = {},
  language = {{ENG}},
  abstract = {{R}apid and accurate source characterizations of large, shallow subduction earthquakes are key for improved tsunami warning efforts. {W}e assess the quality of source parameters of large magnitude ({M}-w >= 7.5) shallow subduction earthquakes of the past 20 yr determined using {SCARDEC}, a recent fully automated broad-band body-wave source inversion technique for the fast estimation of the moment magnitude, depth, focal mechanism and source time functions of global events. {W}e find that {SCARDEC} source parameters agree well with those reported in the global centroid moment tensor ({GCMT}) catalogue, with only the fault dip angle showing a tendency for steeper {SCARDEC} dip values than {GCMT}. {W}e investigate this discrepancy through independent validation tests of the source models by: (i) testing how well they explain data not used in their construction, notably low-frequency normal mode data; and, (ii) assessing the data fit using 3-{D} forward modelling tools more sophisticated than those used to build the source models; specifically, we use a spectral element method for a 3-{D} earth model. {W}e find that {SCARDEC} source parameters explain normal mode data reasonably well compared to {GCMT} solutions. {I}n addition, for the 3-{D} earth model used in our experiments, {SCARDEC} dip angles explain body-wave data similarly or slightly better than {GCMT}. {M}oreover, {SCARDEC} dip angles agree well with results from individual earthquake studies in the literature and with geophysical constraints for different subduction zones. {O}ur results show that {SCARDEC} is a reliable technique for rapid determinations of source parameters of large ({M}-w >= 7.5) subduction earthquakes. {S}ince the {SCARDEC} method provides realistic source time functions allowing the fast identification of long-duration tsunami earthquakes, it is complementary to existing methods routinely used for earthquake monitoring and suitable for ocean-wide tsunami warning purposes.},
  keywords = {{E}arthquake source observations ; {B}ody waves ; {S}urface waves and free oscillations},
  booktitle = {},
  journal = {{G}eophysical {J}ournal {I}nternational},
  volume = {195},
  numero = {3},
  pages = {1989--2004},
  ISSN = {0956-540{X}},
  year = {2013},
  DOI = {10.1093/gji/ggt364},
  URL = {https://www.documentation.ird.fr/hor/{PAR}00011167},
}