Co- and Postseismic Deformation of the 2020 Mw 6.3 Nima (Tibet, China) Earthquake Revealed by InSAR Observations
Abstract
:1. Introduction
2. InSAR Observations
2.1. Coseismic Deformation
2.2. Postseismic Deformation
3. Coseismic Inversion
4. Postseismic Deformation Mechanism
4.1. Afterslip Inversion
4.2. Poroelastic Rebound
5. Discussion
5.1. Comparisons of the Fault Geometry with Previous Studies
5.2. Static Coulomb Failure Stress Changes
6. Conclusions
Author Contributions
Funding
Data Availability Statement
Acknowledgments
Conflicts of Interest
Appendix A. Validation of Coseismic Deformation Fields
Tracks | Orbits | Master | Slave | ΔT (days) | B⊥ (m) | Inc (deg) |
---|---|---|---|---|---|---|
12 | Ascending | 20200706 | 20200811 | 36 | −181 | 41.65 |
12 | Ascending | 20200718 | 20200730 | 12 | −84 | 41.65 |
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Model | Strike (°) | Dip (°) | Rake (°) | Slip (m) | Longitude (°) | Latitude (°) | Length (km) | Width (km) | Depth (km) | Mw | |
---|---|---|---|---|---|---|---|---|---|---|---|
USGS | 20 | 61 | −91 | 86.86 | 33.14 | 10 | 6.3 | ||||
203 | 29 | −88 | |||||||||
CENC | 1 | 48 | −92 | 86.81 | 33.19 | 6 | 6.4 | ||||
183 | 42 | −88 | |||||||||
GCMT | 10 | 48 | −88 | 86.87 | 33.10 | 16.8 | 6.4 | ||||
187 | 42 | −2 | |||||||||
Yang et al. [2] | 30 ± 1.6 | 48.3 ± 2.8 | −80.2 ± 9.1 | 1.2 ± 0.2 | 86.83 | 33.20 | 13.2 ± 0.4 | 6.5 ± 0.4 | 6.3 ± 0.3 | 6.3 | |
This study | InSAR-U a | 29.1 ± 0.8 | 47.2 ± 0.6 | −74.7 ± 2.1 | 1.43 ± 0.23 | 86.866 ± 0.002 | 33.189 ± 0.003 | 11.4 ± 0.2 | 6.9 ± 0.4 | 4.8 * ± 0.1 | 6.37 |
InSAR-D b | 29.1 | 50.2 | - | - | 86.88 | 33.18 | 20.0 | 11.0 | 7.4 | 6.35 |
Tracks | Orbits | Master | Slave | ΔT (days) | ΔPT (days) | B⊥ (m) | Inc (deg) | Data pts |
---|---|---|---|---|---|---|---|---|
121 | Descending | 20200714 | 20200726 | 12 | 4 | 110 | 41.61 | 1172 |
12 | Ascending | 20200718 | 20200730 | 12 | 8 | −84 | 41.65 | 1671 |
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Zhang, M.; Li, Z.; Yu, C.; Liu, Z.; Zhang, X.; Wang, J.; Yang, J.; Han, B.; Peng, J. Co- and Postseismic Deformation of the 2020 Mw 6.3 Nima (Tibet, China) Earthquake Revealed by InSAR Observations. Remote Sens. 2022, 14, 5390. https://doi.org/10.3390/rs14215390
Zhang M, Li Z, Yu C, Liu Z, Zhang X, Wang J, Yang J, Han B, Peng J. Co- and Postseismic Deformation of the 2020 Mw 6.3 Nima (Tibet, China) Earthquake Revealed by InSAR Observations. Remote Sensing. 2022; 14(21):5390. https://doi.org/10.3390/rs14215390
Chicago/Turabian StyleZhang, Miaomiao, Zhenhong Li, Chen Yu, Zhenjiang Liu, Xuesong Zhang, Jiatong Wang, Jing Yang, Bingquan Han, and Jianbing Peng. 2022. "Co- and Postseismic Deformation of the 2020 Mw 6.3 Nima (Tibet, China) Earthquake Revealed by InSAR Observations" Remote Sensing 14, no. 21: 5390. https://doi.org/10.3390/rs14215390