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Sensors 2016, 16(2), 206; doi:10.3390/s16020206

Post-Seismic Deformation from the 2009 Mw 6.3 Dachaidan Earthquake in the Northern Qaidam Basin Detected by Small Baseline Subset InSAR Technique

1,2,3,* , 1,2,3
,
1,2,3
and
4
1
School of Geodesy and Geomatics, Wuhan University, Wuhan 430079, China
2
Key Laboratory of Geospace Environment and Geodesy, Ministry of Education, Wuhan University, Wuhan 430079, China
3
Collaborative Innovation Center for Geospatial Technology, Wuhan 430079, China
4
Department of Geodesy, National Geomatics Center of China, Beijing 100048, China
*
Author to whom correspondence should be addressed.
Academic Editor: Jonathan Li
Received: 1 November 2015 / Revised: 28 January 2016 / Accepted: 3 February 2016 / Published: 5 February 2016
(This article belongs to the Section Remote Sensors)
View Full-Text   |   Download PDF [2675 KB, uploaded 5 February 2016]   |  

Abstract

On 28 August 2009, one thrust-faulting Mw 6.3 earthquake struck the northern Qaidam basin, China. Due to the lack of ground observations in this remote region, this study presents high-precision and high spatio-temporal resolution post-seismic deformation series with a small baseline subset InSAR technique. At the temporal scale, this changes from fast to slow with time, with a maximum uplift up to 7.4 cm along the line of sight 334 days after the event. At the spatial scale, this is more obvious at the hanging wall than that at the footwall, and decreases from the middle to both sides at the hanging wall. We then propose a method to calculate the correlation coefficient between co-seismic and post-seismic deformation by normalizing them. The correlation coefficient is found to be 0.73, indicating a similar subsurface process occurring during both phases. The results indicate that afterslip may dominate the post-seismic deformation during 19–334 days after the event, which mainly occurs with the fault geometry and depth similar to those of the c-seismic rupturing, and partly extends to the shallower and deeper depths. View Full-Text
Keywords: post-seismic deformation; the 2009 Mw 6.3 Dachaidan earthquake; the Qaidam basin; small baseline subset technique; InSAR post-seismic deformation; the 2009 Mw 6.3 Dachaidan earthquake; the Qaidam basin; small baseline subset technique; InSAR
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Liu, Y.; Xu, C.; Wen, Y.; Li, Z. Post-Seismic Deformation from the 2009 Mw 6.3 Dachaidan Earthquake in the Northern Qaidam Basin Detected by Small Baseline Subset InSAR Technique. Sensors 2016, 16, 206.

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