Modeling of co- and post-seismic surface deformation and gravity changes of M W6.9 Yushu, Qinghai, earthquake
详细信息 查看全文
- 作者：Chengli Liu (1) (2)
Bin Shan (1) (2)
Yong Zheng (1)
Ying Jiang (1) (2)
Xiong Xiong (1) - 关键词：Yushu earthquake ; viscoelastic relaxation ; surface deformation ; gravity ; P315.72+5 ; P315.72+6
- 刊名：Earthquake Science
- 出版年：2011
- 出版时间：April 2011
- 年：2011
- 卷：24
- 期：2
- 页码：177-183
- 全文大小：2040KB
- 参考文献：1. Calais E, Vergnolle M, Sankov V, Lukhnev A, Miroshnitchenko A, Amarjargal S and Déverche?e J (2003). GPS measurements of crustal deformation in the Baikal-Mongolia area (1994-002): Implications for current kinematics of Asia. / J Geophys Res 108(B10): 2 501, doi:10.1029/2002JB002373. 73">CrossRef
2. Chen L C, Wang H, Ran Y K, Sun X Z, Su G W, Wang J, Tan X B, Li Z M and Zhang X Q (2010). The / M S7.1 Yushu earthquake surface ruptures and historical earthquakes. / Chinese Science Bulletin 55: 3 504- 509.
3. Deng M L, Sun H P and Xu J Q (2008). A sectionalized fault model of Kunlun / M S8.1 earthquake in constraint of GPS data. / Journal of Geodesy and Geodynamics 28(4): 31-7 (in Chinese with English abstract).
4. Gan W J, Zhang P Z, Shen Z K, Niu Z J, Wang M, Wan Y G, Zhou D M and Cheng J (2007). Present-day crustal motion within the Tibetan Plateau inferred from GPS measurements. / J Geophys Res 112: B08416. CrossRef
5. Ji C, Wald D J and Helmberger D V (2002). Source description of the 1999 Hector Mine, California earthquake. Part I. Wavelet domain inversion theory and resolution analysis. / Bull Seismol Soc Am 92: 1 192- 207.
6. Kirby S H and Kronenberg A K (1987). Rheology of the lithosphere: Selected topics. / Reviews in Geophysics 25: 1 219- 244.
7. Ni S D, Wang W T and Li L (2010). The April 14th, 2010 Yushu earthquake, a devastating earthquake with foreshocks. / Science in China ( / Series E) 53: 791-93 (in Chinese with English abstract). 7/s11430-010-0083-2">CrossRef
8. Niu Z J, Wang M, Sun H R, Sun J Z, You X Z, Gan W J, Xue G J, Hao J X, Xin S H, Wang Y Q, Wang Y X and Li B (2005). Contemporary velocity field of crustal movement of Chinese mainland from Global Positioning System measurements. / Chinese Science Bultetin 50(9): 939-41. CrossRef
9. Shao Z G, Fu R S, Xue T X and Huang J H (2008). The numerical simulation and discussion on mechanism of post seismic deformation after Kunlun / M S8.1 earthquake. / Chinese J Geophys 51(3): 805-16 (in Chinese with English abstract).
10. Shen C Y, Li H and Tan H B (2008). Simulation of co-seismic gravity changes and deformation effect of Wenchuan / M S8.0 earthquake. / Journal of Geodesy and Geodynamics 28(5): 6-2 (in Chinese with English abstract).
11. Shen Z K, Wan Y G, Zeng Y H and Ren Q (2003). Viscoelastic triggering among large earthquakes along the east Kunlun Fault system. / Chinese J Geophys 46(6): 786-95 (in Chinese with English abstract).
12. Tan H B, Shen C Y, Li H, Li J, Xuan S B and Xing L L (2009). Simulation of post-seismic gravity change and deformation of the Wenchuan earthquake based on viscoelastic layered half-space model. / Acta Seismologica Sinica 31(5): 491-05 (in Chinese with English abstract).
13. Tapponnier P, Peltzer G, Dain A Y L and Armijo R (1982). Propagating extrusion tectonics in Asia: New insights from simple experiments with plasticine. / Geology 10: 611-16. 7613(1982)10<611:PETIAN>2.0.CO;2">CrossRef
14. Wang R (1999). A simple orthonormalization method for the stable and efficient computation of Green’s functions. / Bull Seismol Soc Am 89: 733-41.
15. Wang R and Kuempel H J (2003). Poroelasticity: Efficient modeling of strongly coupled, slow deformation processes in a multi-layered half-space. / Geophysics 68(2): 705-17. 7241">CrossRef
16. Wang R, Lorenzo F and Roth F (2003). Computation of deformation induced by earthquakes in a multi-layered elastic crust-FORTRAN programs EDGRN/EDCMP. / Computers and Geosciences 29: 195-07. CrossRef
17. Wang R, Lorenzo F-M and Roth F (2006). PSGRN /PSCMP: A new code for calculating co- and post-seismic deformation, geoid and gravity changes based on the viscoelastic-gravitational dislocation theory. / Computers and Geosciences 32(4): 527-41. CrossRef
18. Wen X Z, Xu X W, Zheng R Z, Xie Y Q and Wan C (2003). The average slip rate of Ganzi-Yushu fault and modern earthquake rupture. / Science in China ( / Series D) 33(Suppl): 199-08 (in Chinese with English abstract).
19. Xu J, Xun J Q, Sun H P and Wu J C (2010). Simulation of deformation and gravity field of Wenchuan / M S8.0 earthquake. / Journal of Geodesy and Geodynamics 30(1): 27-2 (in Chinese with English abstract).
20. Zhang P Z, Deng Q D, Zhang G M, Zhang G M, Ma J, Gan W J, Min W, Mao F Y and Wang Q (2003). Active tectonic blocks and strong earthquakes in the continent of China. / Science in China ( / Series D) 46(Suppl II): 13-4. - 作者单位：Chengli Liu (1) (2)
Bin Shan (1) (2)
Yong Zheng (1)
Ying Jiang (1) (2)
Xiong Xiong (1)
1. Key Laboratory of Dynamic Geodesy, Institute of Geodesy and Geophysics, Chinese Academy of Sciences, Wuhan, 430077, China
2. Graduate University of Chinese Academy of Sciences, Beijing, 100049, China - ISSN：1867-8777
文摘
Based on the elastic dislocation theory, multilayered crustal model, and rupture model obtained by seismic waveform inversion, we calculated the co- and post-seismic surface deformation and gravity changes caused by the Yushu M W6.9 earthquake occurred on April 14, 2010. The observed GPS velocity field and gravity field in Yushu areas are disturbed by the co- and post-seismic effects induced by Yushu earthquake, thus the theoretical co- and post-seismic deformation and gravity changes will provide important modification for the background tectonic movement of Yushu and surrounding regions. The time relaxation results show that the influences of Yushu earthquake on Yushu and surrounding areas will last as long as 30 to 50 years. The maximum horizontal displacement, vertical uplift and settlement are about 1.96, 0.27 and 0.16 m, respectively, the maximal positive and negative value of gravity changes are 8.892×10? m·s? and ?.861×10? m·s?, respectively. Significant spatial variations can be found on the co- and post-seismic effects: The co-seismic effect mainly concentrates in the region near the rupture fault, while viscoelastic relaxation mostly acts on the far field. Therefore, when using the geodetic data to research tectonic motion, we should not only consider the effect of co-seismic caused by earthquake, but also pay attention to the effect of viscoelastic relaxation.