Time-Dependent Afterslip of the 2009 Mw 6.3 Dachaidan Earthquake (China) and Viscosity beneath the Qaidam Basin Inferred from Postseismic Deformation Observations
Abstract
:1. Introduction
2. Data and Layered Model
2.1. Data
2.2. Layered Model
3. Modeling Method
4. Coseismic Slip in the Layered Model
5. Time-Dependent Afterslip and Viscosity
5.1. Time-Dependent Afterslip
5.2. Viscosity
6. Discussion
6.1. Comparison of Inversion Results from Different Methods
6.2. Depth of Afterslip for the 2009 DCD Earthquake
6.3. Viscosity Structure Beneath the Qaidam Basin
7. Conclusions
Acknowledgments
Author Contributions
Conflicts of Interest
Abbreviations
DCD | Dachaidan |
NWW | northwestern-west |
SEE | southeastern-east |
GPS | Global Positioning System |
InSAR | Interferometric Synthetic Aperture Radar |
ASAR | Advanced Synthetic Aperture Radar |
USGS | United States Geological Survey |
XCD | Xiaochaidan |
LOS | line-of-sight |
RMS | root mean square |
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Date No. | Date | T a (Days) | Alpha b (km) | Sigma c (cm) | RMS d (cm) | Statistic Value e (cm) |
---|---|---|---|---|---|---|
1 | 16 September 2009 | 19 | 4.72 | 0.07 | 0.07 | 0.31/0.37 |
2 | 21 October 2009 | 54 | 4.72 | 0.20 | 0.19 | |
3 | 30 December 2009 | 124 | 4.72 | 0.36 | 0.36 | |
4 | 10 March 2010 | 194 | 4.24 | 0.36 | 0.40 | |
5 | 14 April 2010 | 229 | 4.40 | 0.35 | 0.41 | |
6 | 19 May 2010 | 264 | 4.84 | 0.34 | 0.42 | |
7 | 23 June 2010 | 299 | 5.56 | 0.37 | 0.44 | |
8 | 28 July 2010 | 334 | 6.12 | 0.46 | 0.47 |
Layer No. | Thickness (km) | Vp (km/s) | Vs (km/s) | Density (kg/m3) | Viscosity (Pa·s) |
---|---|---|---|---|---|
1 | 8 | 5.19 | 3.00 | 2430.8 | N/A |
2 | 15 | 6.31 | 3.65 | 2790.6 | N/A |
3 | Infinite | 6.06 | 3.50 | 2707.6 | Variable |
Method | Maximum Slip a (m) | Moment a (1016 N·m) | Mw a | Viscosity (Pa·s) |
---|---|---|---|---|
1 | 0.302 | 90.68 | 5.938 | 1 × 1019 |
2 | 0.298 | 90.22 | 5.937 | 1 × 1019 |
3 | 0.274 | 87.26 | 5.927 | N/A |
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Liu, Y.; Xu, C.; Li, Z.; Wen, Y.; Chen, J.; Li, Z. Time-Dependent Afterslip of the 2009 Mw 6.3 Dachaidan Earthquake (China) and Viscosity beneath the Qaidam Basin Inferred from Postseismic Deformation Observations. Remote Sens. 2016, 8, 649. https://doi.org/10.3390/rs8080649
Liu Y, Xu C, Li Z, Wen Y, Chen J, Li Z. Time-Dependent Afterslip of the 2009 Mw 6.3 Dachaidan Earthquake (China) and Viscosity beneath the Qaidam Basin Inferred from Postseismic Deformation Observations. Remote Sensing. 2016; 8(8):649. https://doi.org/10.3390/rs8080649
Chicago/Turabian StyleLiu, Yang, Caijun Xu, Zhenhong Li, Yangmao Wen, Jiajun Chen, and Zhicai Li. 2016. "Time-Dependent Afterslip of the 2009 Mw 6.3 Dachaidan Earthquake (China) and Viscosity beneath the Qaidam Basin Inferred from Postseismic Deformation Observations" Remote Sensing 8, no. 8: 649. https://doi.org/10.3390/rs8080649