High-resolution seismic velocity structure and azimuthal anisotropy around the 2010 Ms=7.1 Yushu earthquake, Qinghai, China from 2D tomography

Tectonophysics

Volumn 584, Issue , 2013, Pages 144-151

  Pei, Shunping ^a   Chen, Yongshun John ^b   Feng, Biao ^a   Gao, Xing ^c   Su, Jinrong ^d  

^a INSTITUTE OF GEOLOGY AND GEOPHYSICS   (China)

^b PEKING UNIVERSITY   (China)

^c INSTITUTE OF GEOGRAPHIC SCIENCES AND NATURAL RESOURCES RESEARCH   (China)

^d Seismological Bureau of Sichuan Province   (China)

Author keywords

Aftershocks; Anisotropy; Seismic tomography; Seismic velocity anomaly; Yushu earthquake

Indexed keywords

AFTERSHOCKS; AZIMUTHAL ANISOTROPY; FRACTURE DISTRIBUTIONS; HIGH RESOLUTION; HIGH VELOCITY; LARGE ANISOTROPY; LATERAL VARIATIONS; LOW-VELOCITY ANOMALY; RUPTURE PROPAGATION; SEISMIC STRUCTURE; SEISMIC TOMOGRAPHY; SEISMIC VELOCITIES; SEISMIC VELOCITY STRUCTURE; SEISMOGENIC ZONES; STRESS ACCUMULATION; SURROUNDING REGIONS; TOMOGRAPHY ALGORITHM; TOMOGRAPHY METHODS; TRAVEL TIME DATA; TRAVEL TIME TOMOGRAPHY; TRAVEL-TIME RESIDUALS; UPPER CRUST; VELOCITY VARIATIONS;

ANISOTROPY; FAULTING; SEISMIC WAVES; SEISMOGRAPHS; TRAVEL TIME;

EARTHQUAKES;

AFTERSHOCK; AZIMUTH; EARTHQUAKE EPICENTER; EARTHQUAKE RUPTURE; NUMERICAL MODEL; SEISMIC ANISOTROPY; SEISMIC TOMOGRAPHY; SEISMIC VELOCITY; UPPER CRUST; VELOCITY STRUCTURE; YUSHU EARTHQUAKE 2010;

EID: 84872390819     PISSN: 00401951     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.tecto.2012.08.020     Document Type: Article

References (41)

1. Aki K. Asperities, barriers, characteristic earthquakes and strong motion prediction. Journal of Geophysical Research 1984, 89(B7):5867-5872. 10.1029/JB089iB07p05867.
2. Backus G.E. Possible forms of seismic anisotropy of the uppermost mantle under oceans. Journal of Geophysical Research 1965, 70:3429-3439.
3. IASPEI New Manual of Seismological Observatory Practice 2002, GeoForschungsZentrum, Potsdam. P. Bormann (Ed.).
4. Chang L.J., Ding Z.F., Wang C.Y. Variations of shear wave splitting in the 2010 Yushu Ms7.1 earthquake region. Chinese Journal of Geophysics 2010, 53:973-979.
5. Chapman C.H., Pratt R.G. Travel time tomography in anisotropic media, I. Theory. Geophysical Journal International 1992, 109:1-19.
6. Chen L.C., Wang H., Ran Y.K., Sun X., Su G., Wang J., Tan X., Li Z., Zhang X. The Ms7.1 Yushu earthquake surface ruptures and historical earthquakes. Chinese Science Bulletin 2010, 55. 10.1007/s11434-010-0293-1.
7. Crampin S. A review of the effects of anisotropic layering on the propagation of seismic waves. Geophysical Journal of the Royal Astronomical Society 1977, 49:9-27.
8. Crampin S., Atkinson B.K. Microcracks in the earth's crust. First Break 1985, 3(3):16-20.
9. Crampin S., Peacock S. A review of shear-wave splitting in the compliant crack-critical anisotropic Earth. Wave Motion 2005, 41:59-77.
10. Crampin S., Zatsepin S.V. Modelling the compliance of crustal rock-II. Response to temporal changes before earthquakes. Geophysical Journal International 1997, 129:495-506.
11. Crampin S., Volti T., Chastin S., Gudmundsson A., Stefansson R. Indication of high pore-fluid pressures in a seismically-active fault zone. Geophysical Journal International 2002, 151:F1-F5.
12. Deng Q.D., et al. Active Tectonics Map of China 2007, Earthquake Press, Beijing.
13. Douglas A. Joint epicenter determination. Nature 1967, 215:47-48.
14. Guo H.D., Zhang B., Lei L.P., Zhang L., Chen Y. Spatial distribution and inducement of collapsed buildings in Yushu earthquake based on remote sensing analysis. Science in China 2010, 53(6):794-796.
15. Hearn T.M. Anisotropic Pn tomography in the western United States. Journal of Geophysical Research 1996, 101:8403-8414.
16. Hearn T.M. Uppermost mantle velocities and anisotropy beneath Europe. Journal of Geophysical Research 1999, 104:15,123-15,139.
17. Hearn T.M., Wang S., Ni J.F., Xu Z., Yu Y., Zhang X. Uppermost mantle velocities beneath China and surrounding regions. Journal of Geophysical Research 2004, 109:B11301. 10.1029/2003JB002874.
18. Kanamori H., Stewart G.S. Seismological aspects of the Guatemala earthquake of February 4, 1976. Journal of Geophysical Research 1978, 83:3427-3434.
19. Lees J.M., Crosson R.S. Tomographic inversion for three-dimensional velocity structure at mount St. Helens using earthquake data. Journal of Geophysical Research 1989, 94:5716-5728.
20. Li C., van der Hilst R.D. Structure of the upper mantle and transition zone beneath Southeast Asia from traveltime tomography. Journal of Geophysical Research 2010, 115:B07308. 10.1029/2009JB006882.
21. Liang C., Song X., Huang J. Tomographic inversion of Pn travel times in China. Journal of Geophysical Research 2004, 109:B11304. 10.1029/2003JB002789.
22. Liu C., Xu L., Chen Y. Quick moment tensor solution for 14 April 2010 Yushu, Qinghai, earthquake. Acta Seismologica Sinica 2010, 32(3):366-368. (in Chinese).
23. Mele G., Rovelli A., Seber D., Hearn T.M., Barazangi M. Compressional velocity structure and anisotropy in the uppermost mantle beneath Italy and surrounding regions. Journal of Geophysical Research 1998, 10:12,529-12,543.
24. Michelena R.J., Muir F., Harris J.M. Anisotropic travel time tomography. Geophysical Prospecting 1993, 41:381-412.
25. Paige C.C., Saunders M.A. LSQR, an algorithm for sparse linear equations and sparse linear system. ACM Transactions on Mathematical Software 1982, 8:43-71.
26. L amplitude tomography in North China. Bulletin of the Seismological Society of America 2006, 96:1560-1566. 10.1785/0120060021.
27. Pei S., Zhao J., Sun Y., Xu Z., Wang S., Liu H., Rowe C.A., Toksöz M.N., Gao X. Upper mantle seismic velocities and anisotropy in China determined through Pn and Sn tomography. Journal of Geophysical Research 2007, 112:B05312. 10.1029/2006JB004409.
28. Pei S., Su J., Zhang H., Sun Y., Toksöz M.N., Wang Z., Gao X., Liu J., He J. Three-dimensional seismic velocity structure across the 2008 Wenchuan Ms8.0 earthquake, Sichuan, China. Tectonophysics 2010, 491:211-217. 10.1016/j.tecto.2009. 08. 039.
29. Phillips W.S., Rowe C.A., Steck L.K. The use of interstation P wave arrival time differences to account for regional path variability. Geophysical Research Letters 2005, 32:L11301. 10.1029/2005GL022558.
30. Pratt R.G., Chapman C.H. Travel time tomography in anisotropic media, II. Application. Geophysical Journal International 1992, 109:20-37.
31. Pratt R.G., McGaughey W.J., Chapman C.H. Anisotropic velocity tomography: a case study in a near-surface rock mass. Geophysics 1993, 58:1748-1763.
32. Pujol J. Comments on the joint determination of hypocenters and station corrections. Bulletin of the Seismological Society of America 1988, 78:1179-1189.
33. Steck L.K., Phillips W.S., Mackey K., Begnaud M.L., Stead R.J., Rowe C.A. Seismic tomography of crustal P and S across Eurasia. Geophysical Journal International 2009, 177:81-92.
34. Wang Y.X., Qian H. Study of crustal velocity structure in east Qinghai. Earth Science Frontiers 2000, 7:568-579.
35. Wang S.Y., Hearn T., Xu Z.H., Ni J., Yu Y.X., Zhang X.D. Velocity structure of uppermost mantle beneath China continent from Pn tomography. Science in China, Series D: Earth Sciences 2002, 45:143-150.
36. Wang S., Fan C., Wang G., Wang E. Late Cenozoic deformation along the northwestern continuation of the Xianshuihe fault system, Eastern Tibetan Plateau. GSA Bulletin 2008, 120:312-327.
37. Wen X.Z., Xu X.W., Zheng R.Z., Xie Y.Q., Wan C. Average slip-rate and recent large earthquake ruptures along the Garze-Yushu fault. Science in China 2003, 46:276-288.
38. Xu L.S., Di H.B., Feng W.P., Li C.L. Estimation of the fault-near ground motion of the 2010 Yushu, Qinghai, Ms7.1 earthquake. Chinese Journal of Geophysics-Chinese Edition 2010, 53(6):1366-1373. (in Chinese).
39. Yang Y., et al. Rayleigh wave phase velocity maps of Tibet and the surrounding regions from ambient seismic noise tomography. Geochemistry, Geophysics, Geosystems 2010, 11:Q08010. 10.1029/2010GC003119.
40. Yao H., van der Hilst R.D., Montagner J.P. Heterogeneity and anisotropy of the lithosphere of SE Tibet from surface wave array tomography. Journal of Geophysical Research 2010, 115:B12307. 10.1029/2009JB007142.
41. Zhang Y., Xu L., Chen Y. Fast inversion of rupture process for 14 April 2010 Yushu, Qinghai, earthquake. Acta Seismologica Sinica 2010, 32(3):361-365. (in Chinese).