@article{887862401ec3449b85c74acdfd2328a5,
title = "The 2016 M7 Kumamoto, Japan, Earthquake Slip Field Derived From a Joint Inversion of Differential Lidar Topography, Optical Correlation, and InSAR Surface Displacements",
abstract = "Observations of surface deformation within 1–2 km of a surface rupture contain invaluable information about the coseismic behavior of the shallow crust. We investigate the oblique strike-slip 2016 M7 Kumamoto, Japan, earthquake, which ruptured the Futagawa-Hinagu Fault. We solve for variable fault slip in an inversion of differential lidar topography, satellite optical image correlation, and Interferometric Synthetic Aperture Radar (InSAR)-derived surface displacements. The near-fault differential lidar pose several challenges. The model fault geometry must follow the surface trace at the sub-kilometer scale. Integration of displacement datasets with different sensitivities to the 3D deformation field and varying spatial distribution permits additional complexity in the inferred slip but introduces ambiguity that requires careful selection of the regularization. We infer a Mw (Formula presented.) earthquake. The maximum slip of 6.9 m occurred at 4.5-km depth, suggesting an on-fault slip deficit in the upper several kilometers of the crust that likely reflects distributed and inelastic deformation within the shallow fault zone.",
keywords = "InSAR, earthquake deformation, earthquake source inversion, lidar, optical correlation, shallow slip",
author = "Chelsea Scott and Johann Champenois and Yann Klinger and Edwin Nissen and Tadashi Maruyama and Tatsuro Chiba and Ramon Arrowsmith",
note = "Funding Information: C. Scott was supported by the NSF Postdoctoral Fellowship 1625221 and by the School of Earth and Space Exploration at Arizona State University. J. C. and Y. K. were funded by IRSN and the Tosca‐CNES Program. E. N. was supported by the Canada Research Chair program and by the Natural Sciences and Engineering Research Council of Canada through Discovery Grant 2017‐04029. We thank Editor Lucy Flesch and two anonymous reviewers for constructive comments. The lidar and InSAR data are published and available from Chiba (2018a, 2018b) and Jiang et al. (2017). The Sentinel‐2 data are freely available from the European Space Agency (https:// scihub.copernicus.eu/dhus/#/home) and can be processed using the open‐ source software package MicMac. Funding Information: C. Scott was supported by the NSF Postdoctoral Fellowship 1625221 and by the School of Earth and Space Exploration at Arizona State University. J.?C. and Y.?K. were funded by IRSN and the Tosca-CNES Program. E.?N. was supported by the Canada Research Chair program and by the Natural Sciences and Engineering Research Council of Canada through Discovery Grant 2017-04029. We thank Editor Lucy Flesch and two anonymous reviewers for constructive comments. The lidar and InSAR data are published and available from Chiba (,) and Jiang et al. (). The Sentinel-2 data are freely available from the European Space Agency (https://scihub.copernicus.eu/dhus/#/home) and can be processed using the open-source software package MicMac. Publisher Copyright: {\textcopyright}2019. American Geophysical Union. All Rights Reserved.",
year = "2019",
month = jun,
day = "28",
doi = "10.1029/2019GL082202",
language = "English (US)",
volume = "46",
pages = "6341--6351",
journal = "Geophysical Research Letters",
issn = "0094-8276",
publisher = "American Geophysical Union",
number = "12",
}