Surface ruptures and building damage of the 2003 Bam, Iran earthquake mapped by satellite synthetic apeerture radar interferometric correlation

Fielding, E. J. and Talebian, M. and Rosen, P. A. and Nazari, H. and Jackson, J. A. and Ghorashi, M. and Walker, R. (2005) Surface ruptures and building damage of the 2003 Bam, Iran earthquake mapped by satellite synthetic apeerture radar interferometric correlation. Journal of Geophysical Research, 110, B (B03302). DOI 10.1029/2004JB003299

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Abstract

We use the interferometric correlation from Envisat synthetic aperture radar (SAR) images to map the details of the surface ruptures related to the 26 December 2003 earthquake that devastated Bam, Iran. The main strike-slip fault rupture south of the city of Bam has a series of four segments with left steps shown by a narrow line of low correlation in the coseismic interferogram. This also has a clear expression in the field because of the net extension across the fault. Just south of the city limits, the surface strain becomes distributed over a width of about 500 m, probably because of a thicker layer of soft sedimentary material. Another fault north of Bam shows offset and low correlation over a wider zone in the interferograms, but it has no discrete surface rupture, possibly because of a net shortening across this fault. Taking the difference between the interferometric correlation for an interval including the earthquake and an interval before the earthquake separates the changes due to the earthquake from other effects in the partially vegetated city of Bam. We map the damage to buildings by measuring the change from high correlation to low correlation where buildings were destroyed by the earthquake.

Item Type:	Article
Additional Information:	copyright 2005 by the American Geophysical Union
Uncontrolled Keywords:	2005 PUBL; 2005 AREP; IA46; IA47
Subjects:	02 - Geodynamics, Geophysics and Tectonics
Divisions:	02 - Geodynamics, Geophysics and Tectonics 08 - Green Open Access
Journal or Publication Title:	Journal of Geophysical Research
Volume:	110, B
Identification Number:	10.1029/2004JB003299
Depositing User:	Sarah Humbert
Date Deposited:	14 May 2011 11:08
Last Modified:	10 Jul 2014 12:05
URI:	http://eprints.esc.cam.ac.uk/id/eprint/1643

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