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

Research output: Contribution to journalArticlepeer-review

39 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)650-660
Number of pages11
JournalGeophysical Journal International
Volume195
Issue number1
DOIs
Publication statusPublished - 2013 Oct
Externally publishedYes

Keywords

  • Inverse theory
  • Numerical solutions
  • Radar interferometry
  • Seismicity and tectonics

ASJC Scopus subject areas

  • Geophysics
  • Geochemistry and Petrology

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