The 2017 Mw 6.6 Poso Earthquake: Implications for Extrusion Tectonics in Central Sulawesi

Research Article| December 27, 2018 The 2017 Mw 6.6 Poso Earthquake: Implications for Extrusion Tectonics in Central Sulawesi Shuai Wang; Shuai Wang aSchool of Geodesy and Geomatics, Wuhan University, No. 129, Luoyu Road, Hongshan District, Wuhan 430079, China, cjxu@sgg.whu.edu.cn Search for other works by this author on: GSW Google Scholar Caijun Xu; Caijun Xu aSchool of Geodesy and Geomatics, Wuhan University, No. 129, Luoyu Road, Hongshan District, Wuhan 430079, China, cjxu@sgg.whu.edu.cn Search for other works by this author on: GSW Google Scholar Wenbin Xu; Wenbin Xu bDepartment of Land Surveying and Geo‐informatics, The Hong Kong Polytechnic University, No. 181, Chatham Road South, Hung Hom, Kowloon, Hong Kong, China, wenbin.xu@polyu.edu.hk Search for other works by this author on: GSW Google Scholar Zhi Yin; Zhi Yin cInstitute of Geodesy, University of Stuttgart, Geschwister‐Scholl‐Str. 24D, 70174 Stuttgart, Germany Search for other works by this author on: GSW Google Scholar Yangmao Wen; Yangmao Wen aSchool of Geodesy and Geomatics, Wuhan University, No. 129, Luoyu Road, Hongshan District, Wuhan 430079, China, cjxu@sgg.whu.edu.cn Search for other works by this author on: GSW Google Scholar Guoyan Jiang Guoyan Jiang dEarth System Science Program, The Chinese University of Hong Kong, Shatin, NT, Hong Kong 999077, China Search for other works by this author on: GSW Google Scholar Author and Article Information Shuai Wang aSchool of Geodesy and Geomatics, Wuhan University, No. 129, Luoyu Road, Hongshan District, Wuhan 430079, China, cjxu@sgg.whu.edu.cn Caijun Xu aSchool of Geodesy and Geomatics, Wuhan University, No. 129, Luoyu Road, Hongshan District, Wuhan 430079, China, cjxu@sgg.whu.edu.cn Wenbin Xu bDepartment of Land Surveying and Geo‐informatics, The Hong Kong Polytechnic University, No. 181, Chatham Road South, Hung Hom, Kowloon, Hong Kong, China, wenbin.xu@polyu.edu.hk Zhi Yin cInstitute of Geodesy, University of Stuttgart, Geschwister‐Scholl‐Str. 24D, 70174 Stuttgart, Germany Yangmao Wen aSchool of Geodesy and Geomatics, Wuhan University, No. 129, Luoyu Road, Hongshan District, Wuhan 430079, China, cjxu@sgg.whu.edu.cn Guoyan Jiang dEarth System Science Program, The Chinese University of Hong Kong, Shatin, NT, Hong Kong 999077, China Publisher: Seismological Society of America First Online: 27 Dec 2018 Online Issn: 1938-2057 Print Issn: 0895-0695 © Seismological Society of America Seismological Research Letters (2019) 90 (2A): 649–658. https://doi.org/10.1785/0220180211 Article history First Online: 27 Dec 2018 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Shuai Wang, Caijun Xu, Wenbin Xu, Zhi Yin, Yangmao Wen, Guoyan Jiang; The 2017 Mw 6.6 Poso Earthquake: Implications for Extrusion Tectonics in Central Sulawesi. Seismological Research Letters 2018;; 90 (2A): 649–658. doi: https://doi.org/10.1785/0220180211 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietySeismological Research Letters Search Advanced Search ABSTRACT Determining how faults behave during large earthquakes can help provide insight into the mechanism of regional tectonism. Here, we use Advanced Land Observing Satellite‐2 (ALOS‐2) and Sentinel‐1 Interferometric Synthetic Aperture Radar (InSAR) data to estimate the source parameters of the 2017 Mw 6.6 Poso earthquake, eastern Indonesia. The results show that the coseismic rupture was predominated by normal faulting at depths of 3–10 km, whereas some distinct dextral strike slip is also resolved along the down‐dip direction of normal‐faulting zones. We analyze the background seismicity, regional topography, and fault kinematics to investigate the present‐day tectonics of central Sulawesi as well as its evolutionary processes. Our preferred slip model provides support for the proposed kinematic model that attributes the extension in central Sulawesi to gravitational collapse, in which mass lateral extrusion along the large‐scale Palu‐Koro strike‐slip fault played an important role. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.