Coseismic slip distribution of the 24 March 2011 Tarlay (Myanmar) mw 6.8 earthquake from ALOS PALSAR interferometry | |
Sun, Jianbao ; Shen, Zheng-Kang ; B??rgmann, Roland ; Xu, Xiwei | |
刊名 | bulletin of the seismological society of america
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2013 | |
DOI | 10.1785/0120120365 |
英文摘要 | We investigate coseismic deformation of the 24 March 2011 Mw 6.8 Tarlay, Myanmar, earthquake using ALOS PALSAR data from both descending and ascending passes. Using high-quality synthetic aperture radar interferograms and amplitude-offset images, the nearly linear surface rupture is well traced along the western end of the Nam Ma fault and strikes ~69??. From both descending and ascending pass Interferometric Synthetic Aperture Radar data and a rigorous maximum a posteriori probabilistic inversion method, we infer that the event involved mostly a pure leftlateral strike-slip rupture with near-vertical geometry. Our one-segment model shows that the maximum slip of ~4:1 m occurred at ~4 km depth, much larger than the slip at the surface. Both interferograms also reveal a small segment to the east of the main rupture, in a densely populated farming area. Our inversion of a two-segment model shows a similar slip distribution on the main fault, in addition to ~0:1-0:3 m left-lateral slip with normal component on a 58?? north-dipping segment. The total seismic moment from the two-segment model is 1:95 ?? 1019 N·m, equivalent to an Mw 6.79 earthquake, which is comparable to the U.S. Geological Survey seismic inversion estimate of 2:10 ?? 1019 N·m (Mw 6.84). The earthquake occurred within a group of eastnortheast-striking left-lateral strike-slip faults near the Myanmar-Laos border, which are seismically active and reflect a system of actively clockwise rotating blocks.; EI; 0; 5; 2928-2936; 103 |
语种 | 英语 |
内容类型 | 期刊论文 |
源URL | [http://ir.pku.edu.cn/handle/20.500.11897/410465] ![]() |
专题 | 地球与空间科学学院 |
推荐引用方式 GB/T 7714 | Sun, Jianbao,Shen, Zheng-Kang,B??rgmann, Roland,et al. Coseismic slip distribution of the 24 March 2011 Tarlay (Myanmar) mw 6.8 earthquake from ALOS PALSAR interferometry[J]. bulletin of the seismological society of america,2013. |
APA | Sun, Jianbao,Shen, Zheng-Kang,B??rgmann, Roland,&Xu, Xiwei.(2013).Coseismic slip distribution of the 24 March 2011 Tarlay (Myanmar) mw 6.8 earthquake from ALOS PALSAR interferometry.bulletin of the seismological society of america. |
MLA | Sun, Jianbao,et al."Coseismic slip distribution of the 24 March 2011 Tarlay (Myanmar) mw 6.8 earthquake from ALOS PALSAR interferometry".bulletin of the seismological society of america (2013). |
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