利用介质的不均匀分布构建各向异性模型

Abstract

Abstract: Under the effect of complicated local stress, the aligned micro-cracks from extensive-dilatancy anisotropy (EDA) are the main anisotropic mechanism in the upper crust. Therefore, the seismic anisotropy study is not only based on transversely isotropic (TI) medium. In this study, the EDA micro-cracks are regarded as the directional arrangement of molecular scale heterogeneity and be described by heterogeneous medium exercising an appropriate smooth disturbances autocorrelation function. According to the simulation of seismic waves by pseudospectral time-domain (PSTD) method in this equivalent anisotropic model, the directional heterogeneity is an effective and reliable method to describe anisotropy essentially, and can be extensively used in geological structure research and analysis of the characteristics of seismic wave propagation.

Key words: Anisotropy, Heterogeneity, Pseudo-spectral Method, Numerical Simulation

CLC Number:

P315.7

SHI Yu-tao, LIU Lan-bo, GAO Yuan. Constructing Anisotropic Model from Directional Heterogeneity Distribution[J]. EARTHQUAKE, 2015, 35(2): 1-10.

References

[1] Crampin S, Evans R, Atkinson B K. Earthquake prediction: A new physical basis[J]. Geophys J R Astron Soc, 1984a, 76: 147-15.
[2] Crampin S, Gao Y. Two species of microcracks[J]. Applied Geophysics. 2014, 11(1): 1-8.
[3] 高原, 郑斯华, 孙勇. 唐山地区地壳裂隙各向异性[J]. 地震学报, 1995, 17(3): 283-293.
[4] Gao Y, Wu J, Fukao Y, et al. Shear-wave splitting in the crust in North China: stress, faults and tectonic implications[J]. Geophys J Int, 2011, 187(2): 642-654. DOI: 10.1111/j.1365-246X.2011.05200.x.
[5] Peng Z G, Ben-Zion Y. Systematic analysis of crustal anisotropy along the Karadere-Duzce branch of the North Anatolian fault[J]. Geophys J Int, 2004, 159: 253-272.
[6] Peng Z G, Ben-Zion Y. Spatiotemporal variations of crustal anisotropy from similar events in aftershocks of the 1999 M7.4 Izmit and M7.1 Düzce, Turkey, earthquake sequences[J]. Geophys J Int, 2005, 160: 1027-1043.
[7] Cochran E S, Li Y G, Vidale J E. Anisotropy in the shallow crust observed around the San Andress Fault before and after the 2004 M6.0 Parkfield earthquake[J]. Bull Seism Soc Am, 2006, 96: S364-S375 .
[8] 石玉涛, 高原, 张永久, 等. 松潘—甘孜地块东部、川滇地块北部与四川盆地西部的地壳剪切波分裂[J]. 地球物理学报, 2013, 56(2): 481-494.
[9] 石玉涛, 高原, 赵翠萍, 等. 汶川地震余震序列的地震各向异性[J]. 地球物理学报, 2009, 52(2): 398-407.
[10] Wu J, Gao Y, Chen, Y T. Shear-wave splitting in the crust beneath the southeast Capital area of North China[J]. J Seismol, 2009, 13: 277-286.
[11] Maupin V, Park J. Chapter 1.09 Theory and Observations-Wave Propagation in Anisotropic Media. In: Treatise on Geophysics, Vol1: Seismology and Structure of the Earth[M]. (Eds. A.M. Dziewonski, B. Romanowicz), Elsevier, 2007, 289-321.
[12] Crampin S. Effective anisotropic elastic-constants for wave propagation through cracked solids[J]. Geophys J R astron Soc, 1984b, 76: 135-145.
[13] Orszag S A. Comparison of pseudospectral and spectral approximation[J]. Stu App1 Math, 1972, 51: 253-259.
[14] Tessmer E, Kosloff D. 3-D elastic modeling with surface topography by a Chebyshev spectral method[J]. Geophysics, 1994, 59: 464-473.
[15] Wang Y, Takenaka H, Furumura T. Modelling seismic wave propagation in a two-dimensional cylindrical whole earth model using the pseudospectral method[J]. Geophys J Int, 2001, 145: 689-708.
[16] Huang Q H, Li Z H, Wang Y B. A parallel 3-D staggered grid pseudospectral time domain method for ground-penetrating radar wave simulation[J]. J Geophys Res, 2010, 115: B12101, doi: 10.1029/2010JB007711.
[17] Liu Q H. The PSTD algorithm: a time-domain method requiring only two cells per wave-length, Microwave Opt[J]. Tech Lett, 1997, 15(3): 158-165.
[18] Liu L B, Xiao L, Liu H, et al. Numerical simulation of the effect of a DC electric field on seismic wave propagation with the pseudospectral time domain method[J]. Pure and Applied Geophysics, 2006, 163(9): 1893-1913.
[19] 侯安宁, 等. 各向异性介质中弹性波传播特征的伪谱法模拟研究[J]. 石油物探, 1995, 34(2): 36-45.
[20] Ergintav S, Canitez N. Modeling of multi-scale media in discrete form[J]. J Seis Expl, 1997, 6: 77-96.
[21] Furumura T, Kennett B L N, Furumura M. Seismic wave field calculation for laterally heterogeneous whole earth models using the pseudospectral method[J]. Geophys J Int, 1998, 135: 845-860.
[22] Thomsen L. Weak elastic anisotropy[J]. Geophysics, 1986, 51(10): 1954-1996.
[23] Andreas Rüger. P-wave reflection coefficients for transversely isotropic models with vertical and horizontal axis of symmetry[J]. Geophysicists. 1997, 62(3); 713-722.

Constructing Anisotropic Model from Directional Heterogeneity Distribution

PDF (PC)

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 15

Recommended Articles

Metrics

Comments

[1]	WANG Hui, CAO Jian-ling, YAO Qi, SHI Yu-tao, LIU Yue. Two-dimensional Numerical Simulations of Effects of Static Stress Disturbance on Seismic Rupture Propagation Near Stepovers of Striking-slip Fault [J]. EARTHQUAKE, 2024, 44(2): 86-103.
[2]	GAO Yuan, LI Xin-yi, LI Shu-yu, XIA Xin-yu, YANG Yi-wen, WANG Qiong. Deep and Shallow Deformation Tectonics of Jishishan M_S6.2 Earthquake on 18 December 2023 in China [J]. EARTHQUAKE, 2024, 44(1): 160-166.
[3]	YANG Wei-jia, ZHOU Yan-jie, JIANG En-yuan, SHI Yu-tao, MA Xiao, HE Xi-jun, HUANG Xue-yuan. Tomographic Study on the Velocity Structures and P-wave Azimuthal Anisotropy of the 2019 Changning M_S6.0 Earthquake Surrounding Area [J]. EARTHQUAKE, 2023, 43(4): 1-20.
[4]	HE Kang, XIE Tao, WANG Yi-kun, LI Jun-hui, ZHENG Hai-gang. Analysis of Earth Resistivity Anomaly at Hefei Seismic Station before the 2011 Anqing M4.8 Earthquake [J]. EARTHQUAKE, 2023, 43(2): 72-84.
[5]	YANG Ye-xin, MENG Guo-jie, WU Wei-wei, LUO Yan, Thant Myo. Characteristics of Deep and Shallow Tectonics Deformation in Southwest Yunnan [J]. EARTHQUAKE, 2023, 43(1): 74-92.
[6]	CHE Zi-qiang, WU Zhong-liang, GAO Yuan. Rayleigh Wave Phase Velocity and Azimuthal Anisotropy across Haiyuan Fault Zone and Its Adjacent Area Derived from Ambient Noise Tomography [J]. EARTHQUAKE, 2023, 43(1): 105-123.
[7]	LI Xin-yan, ZENG Xian-wei, LU Jun, MA He-qing, CUI Jin, WEI Ding-jun. Anomalies of Apparent Resistivity Before the 2015 AlxaZuoqi M_S5.8 Earthquake in Inner Mongolia of China Based on Fault Virtual Dislocation Model [J]. EARTHQUAKE, 2022, 42(2): 89-99.
[8]	ZHA Xiao-hui. Study on the Influence of Inclined Interface and Anisotropy on the Method of Harmonic Decomposition [J]. EARTHQUAKE, 2022, 42(1): 99-110.
[9]	LI Ying, GAO Yuan. Basic Characteristics of Tectonics and Seismic Anisotropy in the Southeastern Margin of the Qinghai-Tibet Plateau [J]. EARTHQUAKE, 2021, 41(4): 15-45.
[10]	CHEN Yan-han, WU Qing-ju. P Wave Polarization Analysis on Part CDSN [J]. EARTHQUAKE, 2020, 40(4): 49-62.
[11]	LIU Xi-kang, LI Yuan, DING Zhi-feng, CHANG Li-jun, WANG Yue-dong. A Study on Variation Characteristics of Shear-wave Splitting in the September 7, 2012 Yiliang Earthquake Region [J]. EARTHQUAKE, 2020, 40(1): 73-83.
[12]	LI Yuan, LIU Xi-kang, LIU Xia, DU Xue-song, WAN Yong-kui. Numerical Simulation of the Cross-fault Baseline Anomalies of Trend Break and Annual Cycle Disappearance at the Tangshan Station [J]. EARTHQUAKE, 2019, 39(1): 39-47.
[13]	ZHANG Guo-ling,JIA Li-feng,QIAO Zi-yun,GUO Xue-zeng,NIU Shu-yu. Quantitative Analysis of Georesistivity Disturbances at Xingji Station, Hebei Province [J]. EARTHQUAKE, 2017, 37(4): 102-111.
[14]	WU Ye,ZHAO Xiao-yan,SHI Yan-bin,YU Zi-zhao,HE Xin-juan, HU Po,XIONG Zhong-hua. Dispersion Analysis Using Pseudo-spectral Algorithm in Acoustic Wave Numerical Simulation [J]. EARTHQUAKE, 2017, 37(2): 135-146.
[15]	LI Hai-yan, MA Hong-sheng, SHAO Zhi-gang, WANG Peng. Analyzing Strong Earthquake Hazard based on Fault Movements and Stress Evolution: A Review [J]. EARTHQUAKE, 2016, 36(1): 87-104.