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The 2011 Mw 6.8 Burma earthquake: fault constraints provided by multiple SAR techniques

Lookup NU author(s): Professor Zhenhong Li

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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 multiple-aperture 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 4.2 m occurs at a depth of 2.5 km, with significant slip constrained only to the upper 10 km of the crust.

Publication metadata

Author(s): Feng W, Li Z, Elliott JR, Fukushima Y, Hoey T, Singleton A, Cook R, Xu Z

Publication type: Article

Publication status: Published

Journal: Geophysical Journal International

Year: 2013

Volume: 195

Issue: 1

Pages: 650-660

Print publication date: 25/07/2013

ISSN (print): 0956-540X

ISSN (electronic): 1365-246X

Publisher: Oxford University Press

URL: http://dx.doi.org/10.1093/gji/ggt254

DOI: 10.1093/gji/ggt254

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