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Source Rupture Process of the 2014 Ms 6.5 Ludian, Yunnan, China, Earthquake in 3D Structure: The Strain Green’s Tensor Database Approach

2018; Seismological Society of America; Volume: 108; Issue: 6 Linguagem: Inglês

10.1785/0120180090

1943-3573

Yan Luo, Ming‐Che Hsieh, Li Zhao,

Seismic Imaging and Inversion Techniques

Research Article| October 16, 2018 Source Rupture Process of the 2014 Ms 6.5 Ludian, Yunnan, China, Earthquake in 3D Structure: The Strain Green's Tensor Database Approach Yan Luo; Yan Luo aInstitute of Earthquake Forecasting, China Earthquake Administration, 63 Fuxing Road, Haidian District, Beijing 100036, China Search for other works by this author on: GSW Google Scholar Ming‐Che Hsieh; Ming‐Che Hsieh bDisaster Prevention Technology Research Center, Sinotech Engineering Consultants Inc., 280 Xinhu Second Road, Neihu District, Taipei 11494, Taiwan, Republic of China Search for other works by this author on: GSW Google Scholar Li Zhao Li Zhao cSchool of Earth and Space Sciences, Peking University, 5 Yiheyuan Road, Haidian District, Beijing 100871, China, lizhaopku@pku.edu.cn Search for other works by this author on: GSW Google Scholar Bulletin of the Seismological Society of America (2018) 108 (6): 3270–3277. https://doi.org/10.1785/0120180090 Article history first online: 16 Oct 2018 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Tools Icon Tools Get Permissions Search Site Citation Yan Luo, Ming‐Che Hsieh, Li Zhao; Source Rupture Process of the 2014 Ms 6.5 Ludian, Yunnan, China, Earthquake in 3D Structure: The Strain Green's Tensor Database Approach. Bulletin of the Seismological Society of America 2018;; 108 (6): 3270–3277. doi: https://doi.org/10.1785/0120180090 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search nav search search input Search input auto suggest search filter All ContentBy SocietyBulletin of the Seismological Society of America Search Advanced Search Abstract Reliable source slip‐distribution models of moderate and large earthquakes are important not only for understanding earthquake source physics but also for making realistic seismic hazard assessments. In this study, we carry out the inversion for finite‐fault rupture process of the 2014 Ms 6.5 Ludian earthquake in a structural model with 3D velocity heterogeneity and surface topography. To ensure efficiency in calculating 3D synthetics during slip‐distribution inversions, a database of strain Green's tensors (SGTs) is established for the structural model. We then use the SGT database approach to perform the source slip‐distribution inversion for the Ludian earthquake using regional broadband seismic records. The accommodation of lateral velocity heterogeneity and surface topography reduces modeling errors in source inversion. The finite‐fault slip model indicates that the Ludian earthquake rupture initiated from the hypocenter and propagated southeastward and upward, reaching the ground surface with a surface rupture of ∼16 km in length and a maximum left‐lateral slip of ∼1.2 m⁠, in agreement with the findings of field surveys after the earthquake. You do not currently have access to this article.