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Lookup NU author(s): Dr Yang Liu, Professor Zhenhong Li, Jiajun Chen
This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).
The 28 August 2009 Mw 6.3 Dachaidan (DCD) earthquake occurred at the Qaidam Basin’s northern side. To explain its postseismic deformation time series, the method of modeling them with a combination model of afterslip and viscoelastic relaxation is improved to simultaneously assess the time-dependent afterslip and the viscosity. The coseismic slip model in the layered model is first inverted, showing a slip pattern close to that in the elastic half-space. The postseismic deformation time series can be explained by the combination model, with a total root mean square (RMS) misfit of 0.37 cm. The preferred time-dependent afterslip mainly occurs at a depth from the surface to about 9.1 km underground and increases with time, indicating that afterslip will continue after 28 July 2010. By 334 days after the main shock, the moment released by the afterslip is 0.91 × 1018 N∙m (Mw 5.94), approximately 24.3% of that released by the coseismic slip. The preferred lower bound of the viscosity beneath the Qaidam Basin’s northern side is 1 × 1019 Pa·s, close to that beneath its southern side. This result also indicates that the viscosity structure beneath the Tibet Plateau may vary laterally.
Author(s): Liu Y, Xu C, Li Z, Wen Y, Chen J, Li Z
Publication type: Article
Publication status: Published
Journal: Remote Sensing
Year: 2016
Volume: 8
Issue: 8
Online publication date: 10/08/2016
Acceptance date: 03/08/2016
Date deposited: 03/09/2016
ISSN (electronic): 2072-4292
Publisher: MDPI AG
URL: http://dx.doi.org/10.3390/rs8080649
DOI: 10.3390/rs8080649
Notes: This article belongs to the Special Issue Earth Observations for Geohazards.
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