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

Feng, W., Li, Z., Elliott, J. R., Fukushima, Y., Hoey, T., Singleton, A., Cook, R. and Xu, Z. (2013) The 2011 Mw 6.8 Burma earthquake: fault constraints provided by multiple SAR techniques. Geophysical Journal International, 195(1), pp. 650-660. (doi:10.1093/gji/ggt254)

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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, MW 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.

Item Type:Articles
Keywords:Radar interferometry, earthquake source parameters
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Li, Dr Zhenhong and Singleton, Mr Andrew and Cook, Mr Robert and Hoey, Professor Trevor
Authors: Feng, W., Li, Z., Elliott, J. R., Fukushima, Y., Hoey, T., Singleton, A., Cook, R., and Xu, Z.
Subjects:G Geography. Anthropology. Recreation > GB Physical geography
Q Science > QE Geology
College/School:College of Science and Engineering > School of Geographical and Earth Sciences
Research Group:Earth System Research Group: Geomatics
Journal Name:Geophysical Journal International
Publisher:Royal Astronomical Society
ISSN:0956-540X
ISSN (Online):1365-246X
Copyright Holders:Copyright © 2013 The Authors
First Published:First published in Geophysical Journal International 195(1):650-660
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
513031GAS: Generic Atmosphere Solutions for radar measurementsZhenhong LiNatural Environment Research Council (NERC)NE/H001085/1SCHOOL OF GEOGRAPHICAL & EARTH SCIENCES