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Fault parameters of the October 2008 Damxung Mw 6.3 earthquake from InSAR inversion and its tectonic implication

Lookup NU author(s): Professor Zhenhong Li

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Abstract

A Mw6.3 earthquake occurred in Damxung, Tibet, on October 6th, 2008. We determined the fault parameters using a descending coseismic interferogram from ENVISAT ASAR images. In addition， we examined the uncertainties in the InSAR-derived source parameters using the variance-covariance matrix of InSAR data points estimated with a 1-D semivariogram function. The inverted results showed that the earthquake occurred on a secondary fault in the eastern margin of the Yangyi basin, with a strike of 178°, a dip of 58° and dipping to west, which was normal faulting with a little of right-lateral strike slipping. It also appeared that the impact of the measurement errors on the uncertainties in InSAR derived source parameters was limited. This earthquake led to a subsidence of at least 30 cm at the epicenter, implying the Yangyi basin in the northern Yadong-Gulu Rift Belt was subsiding probably.

Publication metadata

Author(s): Feng W, Xu L, Li Z

Publication type: Article

Publication status: Published

Journal: Diqiu Wuli Xuebao = Chinese Journal of Geophysics (Chinese Edition)

Year: 2010

Volume: 53

Issue: 5

Pages: 1134-1142

Print publication date: 01/05/2010

ISSN (print): 0001-5733

Publisher: Kexue Chubanshe

URL: http://dx.doi.org/10.3969/j.issn.0001-5733.2010.05.014

DOI: 10.3969/j.issn.0001-5733.2010.05.014

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