The 2011MW 6.8 Burma earthquake: Fault constraints provided by multiple SAR techniques

Wanpeng Feng; Zhenhong Li; John R. Elliott; Yo Fukushima; Trevor Hoey; Andrew Singleton; Robert Cook; Zhonghuai Xu

doi:10.1093/gji/ggt254

The 2011M_W 6.8 Burma earthquake: Fault constraints provided by multiple SAR techniques

Wanpeng Feng, Zhenhong Li, John R. Elliott, Yo Fukushima, Trevor Hoey, Andrew Singleton, Robert Cook, Zhonghuai Xu

Research output: Contribution to journal › Article › peer-review

74 Citations (Scopus)

Abstract

We used two tracks of ALOS PALSAR images to investigate the focal mechanism and slip distribution of the 2011 March 24, M_W 6.8 Burma strike-slip earthquake. Three different SAR techniques, namely conventional interferometry, SAR pixel offsets (SPO) and multipleaperture InSAR (MAI), were employed to obtain the coseismic surface deformation fields along the ~30 km length of the fault rupture. Along-track measurements from SPO and MAI techniques show a high correlation, and were subsequently used to precisely determine the location and extent of the surface fault trace. The best-fitting fault model geometry derived from an iterative inversion technique suggests that the rupture occurred on a near-vertical sinistral strike-slip fault west of the Nam Ma fault with a strike of 70°. A maximum slip of 4.2m occurs at a depth of 2.5 km, with significant slip constrained only to the upper 10 km of the crust.

Original language	English
Pages (from-to)	650-660
Number of pages	11
Journal	Geophysical Journal International
Volume	195
Issue number	1
DOIs	https://doi.org/10.1093/gji/ggt254
Publication status	Published - 2013 Oct
Externally published	Yes

Keywords

Inverse theory
Numerical solutions
Radar interferometry
Seismicity and tectonics

ASJC Scopus subject areas

Geophysics
Geochemistry and Petrology

Access to Document

10.1093/gji/ggt254

Cite this

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title = "The 2011MW 6.8 Burma earthquake: Fault constraints provided by multiple SAR techniques",

abstract = "We used two tracks of ALOS PALSAR images to investigate the focal mechanism and slip distribution of the 2011 March 24, MW 6.8 Burma strike-slip earthquake. Three different SAR techniques, namely conventional interferometry, SAR pixel offsets (SPO) and multipleaperture InSAR (MAI), were employed to obtain the coseismic surface deformation fields along the ~30 km length of the fault rupture. Along-track measurements from SPO and MAI techniques show a high correlation, and were subsequently used to precisely determine the location and extent of the surface fault trace. The best-fitting fault model geometry derived from an iterative inversion technique suggests that the rupture occurred on a near-vertical sinistral strike-slip fault west of the Nam Ma fault with a strike of 70°. A maximum slip of 4.2m occurs at a depth of 2.5 km, with significant slip constrained only to the upper 10 km of the crust.",

keywords = "Inverse theory, Numerical solutions, Radar interferometry, Seismicity and tectonics",

author = "Wanpeng Feng and Zhenhong Li and Elliott, {John R.} and Yo Fukushima and Trevor Hoey and Andrew Singleton and Robert Cook and Zhonghuai Xu",

year = "2013",

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T2 - Fault constraints provided by multiple SAR techniques

AU - Feng, Wanpeng

AU - Li, Zhenhong

AU - Elliott, John R.

AU - Fukushima, Yo

AU - Hoey, Trevor

AU - Singleton, Andrew

AU - Cook, Robert

AU - Xu, Zhonghuai

PY - 2013/10

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N2 - We used two tracks of ALOS PALSAR images to investigate the focal mechanism and slip distribution of the 2011 March 24, MW 6.8 Burma strike-slip earthquake. Three different SAR techniques, namely conventional interferometry, SAR pixel offsets (SPO) and multipleaperture InSAR (MAI), were employed to obtain the coseismic surface deformation fields along the ~30 km length of the fault rupture. Along-track measurements from SPO and MAI techniques show a high correlation, and were subsequently used to precisely determine the location and extent of the surface fault trace. The best-fitting fault model geometry derived from an iterative inversion technique suggests that the rupture occurred on a near-vertical sinistral strike-slip fault west of the Nam Ma fault with a strike of 70°. A maximum slip of 4.2m occurs at a depth of 2.5 km, with significant slip constrained only to the upper 10 km of the crust.

AB - We used two tracks of ALOS PALSAR images to investigate the focal mechanism and slip distribution of the 2011 March 24, MW 6.8 Burma strike-slip earthquake. Three different SAR techniques, namely conventional interferometry, SAR pixel offsets (SPO) and multipleaperture InSAR (MAI), were employed to obtain the coseismic surface deformation fields along the ~30 km length of the fault rupture. Along-track measurements from SPO and MAI techniques show a high correlation, and were subsequently used to precisely determine the location and extent of the surface fault trace. The best-fitting fault model geometry derived from an iterative inversion technique suggests that the rupture occurred on a near-vertical sinistral strike-slip fault west of the Nam Ma fault with a strike of 70°. A maximum slip of 4.2m occurs at a depth of 2.5 km, with significant slip constrained only to the upper 10 km of the crust.

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KW - Numerical solutions

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