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:Hoey, Professor Trevor and Singleton, Mr Andrew and Li, Dr Zhenhong and Cook, Mr Robert
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