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Measuring ground displacements from SAR amplitude images: Application to the Landers Earthquake

Michel, Rémi and Avouac, Jean-Philippe and Taboury, Jean (1999) Measuring ground displacements from SAR amplitude images: Application to the Landers Earthquake. Geophysical Research Letters, 26 (7). pp. 875-878. ISSN 0094-8276. http://resolver.caltech.edu/CaltechAUTHORS:20120906-102733380

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Abstract

ERS SAR amplitude images are utilized to map ground displacements from a sub‐pixel correlation method. It yields a ground two‐dimensional displacement field with independent measurements about every 128m in azimuth and 250m in range. The accuracy depends on the characteristics of the images. For the Landers test case, the 1‐σ uncertainty is 0.8m in range and 0.4m in azimuth. We show that this measurement provides a map of major surface fault ruptures accurate to better than 1km and information on coseismic deformation comparable to the 92 GPS measurements available. Although less accurate, this technique is more robust than SAR interferometry and provides complementary information since interferograms are only sensitive to the displacement in range.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1029/1999GL900138 DOIUNSPECIFIED
http://www.agu.org/pubs/crossref/1999/1999GL900138.shtmlPublisherUNSPECIFIED
Additional Information:© 1999 by the American Geophysical Union. Received August 17, 1998; revised January 20, 1999; accepted February 8, 1999. We are most grateful to Jean-Bernard de Chabalier and Gilles Peltzer for fruitful discussions.
Subject Keywords:Geodesy and Gravity: Seismic deformations; Exploration Geophysics: Remote sensing; Radio Science: Remote sensing
Record Number:CaltechAUTHORS:20120906-102733380
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20120906-102733380
Official Citation:Michel, R., J. Avouac, and J. Taboury (1999), Measuring ground displacements from SAR amplitude images: Application to the Landers Earthquake, Geophys. Res. Lett., 26(7), 875–878, doi:10.1029/1999GL900138
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:33901
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:07 Sep 2012 16:50
Last Modified:26 Dec 2012 16:07

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