由中国CDSN台网检测到的汶川地震所激发的地球球型自由振荡

Abstract

Abstract: An M8.0 earthquake struck Wenchuan on May 12, 2008. The strong earthquake made continuous oscillation of the earth. Using the 5-day seismic waveform data recorded by China Digital Seismograph Network (CDSN) after the earthquake, we studied the data of VHZ channel by power spectral density estimation. Because the frequency response of seismograph in CDSN suppresses the information of low frequency signal,we do not need to remove the solid tide in our data processing. So we extracted 73 spherical modes of ₀S₄～₀S₇₆ of the earth's free oscillation and other 6 modes(₁S₂, ₃S₂, ₁S₄, ₁S₀, ₁S₇, ₄S₂) and they are consistent and nearly same with the frequencies of the modes of Preliminary Reference Earth Model (PREM). The results can be used to invert focal mechanism of this earthquake and to explore the inner structure of the earth.

Key words: Power spectral density estimation, Earth free oscillation, Spheroidal free oscillation, Wenchuan earthquake

CLC Number:

P315.7

XU Xiao-feng, WAN Yong-ge, WANG Hui-lin. Spheroidal Mode of the Earth Free Oscillations Excitated by Wenchuan Earthquake Recorded by China Digital Seismograph Network[J]. EARTHQUAKE, 2010, 30(1): 36-49.

References

[1] Lapwood E R, Usami T. Free Oscillations of the Earth[M]. Cambrige Univ. Press, London, 1981.
[2] Benioff H, Press F, Smith S. Excitation of the free oscillations of the earth by earthquake[J]. J Geophys Res, 1961, 66(2): 605-619.
[3] 严珍珍, 张怀, 杨长春, 等. 地震激发的地球自由振荡研究综述[J]. 地球物理学进展, 2008, 23(3): 686-693.
[4] 万永革, 周公威, 郭燕平. 中国数字地震台网记录的昆仑山口西地震的球型自由振荡[J]. 地震, 2005, 25(1): 31-40.
[5] 万永革, 周公威, 郭燕平, 等. 昆仑山口西地震激发的地球环型振荡[J]. 防灾减灾工程学报, 2004, 24(1): 1-7.
[6] 雷湘鄂, 许厚泽, 孙和平. 利用超导重力观测资料检测地球自由振荡[J]. 科学通报, 2002, 47(18): 1432-1436.
[7] 雷湘鄂, 许厚泽, 孙和平. 由5个国际超导重力仪台站资料检测到的秘鲁8.2级大地震所激发的球型自由振荡现象[J]. 中国科学(D辑: 地球科学), 2004, 34(5): 483-491.
[8] 雷湘鄂, 孙和平, 许厚泽, 等. 苏门达腊大地震激发的地球自由振荡及其谱线分裂的检测与讨论[J]. 中国科学(D辑: 地球科学), 2007, 37(4): 504-511.
[9] 吕永清, 蔡亚先, 周云耀. 用JCZ-1超宽频带数字地震仪观测地球自由振荡[J]. 地壳形变与地震, 1997, 17(3): 103-105.
[10] 万永革, 盛书中, 周公威, 等. 中国数字地震台网记录的苏门答腊—安达曼地震激发的地球球型自由振荡的检测[J]. 地震学报, 2007, 29(4): 369-381.
[11] 于海英, 朱元清, 寿海涛. 印度洋9.0级大地震激发的地球球型振荡和环型振荡[J]. 地球物理学进展, 2006, 21(3): 706-716.
[12] 邱泽华, 马瑾, 池顺良, 等. 钻孔差应变仪观测的苏门答腊大地震激发的地球环型自由振荡[J]. 地球物理学报, 2007, 50(3): 797-805.
[13] 唐磊, 邱泽华, 阚宝祥. 中国钻孔体应变台网观测到的地球球型振荡[J]. 大地测量与地球动力学, 2007, 27(6): 37-44.
[14] 严珍珍. 地震激发地球自由振荡过程的数值模拟初步探索[J]. 地球科学进展, 2008, 23(10): 1020-1026.
[15] 任佳, 陈华静, 王松, 等. 汶川大地震激发的地球球型自由振荡[J]. 中国地震, 2009, 25(1): 73-80.
[16] Derr J S. Internal structure of the earth inferred from free oscillations[J]. J Geophys Res, 1969, 74(5): 202-219.
[17] Haddon R A W, Bullen K E. An earth model incorporating free oscillation data[J]. Phys Earth Planet Interi, 1969, 2: 35-49.
[18] Dziewonski A M, Anderson D L. Preliminary reference earth model(PREM)[J]. Phys Earth Planet Interi, 1981, 25: 297-356.
[19] Shibata N, Suda N, Fukao Y. Use of apparent complex frequencies of free oscillations to estimate aspherical structure of the earth[J]. Geophys Res Lett, 18: 905-908.
[20] Resovsky J S, Pestana R. Improved normal mode constraints on lower mantle Vp from generalized spectral fitting[J]. Geophys Res Lett, 2003, 30(7): 13-83.
[21] Kedar S, Watada S, Tanimoto T. The 1989 Macquarie Ridge earthquake: Seismic moment estimation from long period free oscillations[J]. J Geophys Res, 1994, 99(17): 893-908.
[22] 马淑田, 郝建国. 1995年7月12日中缅边界M_S=7.3地震的震源机制解[J]. 地震学报, 1997, 19(1): 107-109.
[23] 高原, Van der Lee S, Giardini D, 等. 应用振型叠加方法研究1997年11月8日中国西藏玛尼地震震源机制[J]. 地球物理学报, 2001, 44(增刊): 98-106.
[24] Beroza G C, Jordan T H. Searching for slow and silent earthquakes using free oscillations[J]. J Geophys Res, 1990, 95(2): 485-510.
[25] Kedar S, Watada S, Tanimoto T. The 1989 Macquarie Ridge earthquake: Seismic moment estimation from long period free oscillations[J]. J Geophys Res, 1994, 99: 17893-17908.
[26] 徐锡伟, 闻学泽, 叶建青, 等. 汶川M_S8.0地震地表破裂带及其发震构造[J]. 地震地质, 2008, 30(3): 597-629.
[27] 周公威, 张伯明, 吴忠良, 等. 中国数字地震台网(CDSN)的近期发展[J]. 地球物理学进展, 2007, 22(4): 1130-1134.
[28] 周公威, 张伯明, 吴忠良, 等. 中国数字地震台网的现状和近期发展[J]. 地震学报, 2005, 27(1): 109-116.
[29] 何振亚.数字信号处理的理论与应用[M]. 北京: 人民邮电出版社, 1983.
[30] 万永革. 数字信号处理的MATLAB实现[M]. 北京: 地震出版社, 2007.

Spheroidal Mode of the Earth Free Oscillations Excitated by Wenchuan Earthquake Recorded by China Digital Seismograph Network

PDF (PC)

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 15

Recommended Articles

Metrics

Comments

[1]	LUO Jun, ZHAO Cui-ping, WANG Rong-jiang. Quantitative Analysis of the Relationship between the Zipingpu Reservoir Impoundment and the 2008 Wenchuan M_S8.0 Earthquake [J]. EARTHQUAKE, 2018, 38(2): 51-61.
[2]	ZHANG Wei,LI Zhong,LIU Hai-jun,AN Jian-qin,SONG Yi-yao. Classification of Space Electric Field Based on Improved BP Network [J]. EARTHQUAKE, 2017, 37(4): 173-180.
[3]	HE Jian-hui,ZHANG Xue-min,LIN Jian,WANG Min,SHEN Xu-hui. Coseismic Ionosphere Disturbances of the 2008 Wenchuan Earthquake [J]. EARTHQUAKE, 2017, 37(2): 126-134.
[4]	YUAN Gui-ping, ZHANG Xue-min, WU Ying-yan, ZHAO Xu-dong. Minimum Point Shift of the Geomagnetic Vertical Component in Diurnal Variation and the Internal-external Equivalent Current System S_q before the 2008 Wenchuan M_S8.0 Earthquake [J]. EARTHQUAKE, 2015, 35(3): 102-112.
[5]	XIONG Xiao-hui, JIANG Zai-sen, WU Yan-qiang, LIU Xiao-xia, WEI Wen-xin, ZOU Zhen-yu, WANG Qi-xin. Dynamic Crustal Deformation Characteristics from GPS Data in the Southern Section of the Longmenshan Fault Belt after the 2008 Wenchuan Earthquake [J]. EARTHQUAKE, 2015, 35(3): 10-21.
[6]	LIANG Jian-hong, LIU Jie, YANG Wen, DENG Fei. An Algorithm for Detecting Low-frequency Seismic Event and Preliminary Applications [J]. EARTHQUAKE, 2015, 35(1): 1-10.
[7]	XIAO Zhen, ZHENG Yong, XIONG Xiong. Application of Coda Wave Interferometry Method in Relative Location of the Wenchuan Earthquake Sequence [J]. EARTHQUAKE, 2014, 34(2): 1-11.
[8]	ZHENG Liang, ZHANG Huai, SUN Yu-jun, CHENG Hui-hong, ZHANG Bei, SHI Yao-lin. Comparison of 2D and 3D Finite Element Simulations in the Research of Reservoir Induced Earthquakes [J]. EARTHQUAKE, 2013, 33(4): 162-171.
[9]	LI Qiang, JIANG Zai-sen, WU Yan-qiang, ZHAO Jing, WEI Wen-xin, LIU Xiao-xia. Discussion on the Implications of Short-term Crust Deformation Characteristics in the Northeastern Margin of Tibetan Plateau after the 2008 Wenchuan Earthquake [J]. EARTHQUAKE, 2013, 33(3): 124-132.
[10]	LI Xiao-xuan, MA Hai-jian. Risk Assessment of Earthquake-induced Collapses and Slides Based on Logistic Model for the Case of Wenchuan County [J]. EARTHQUAKE, 2013, 33(2): 63-70.
[11]	ZHANG Si-xin, ZHANG Xi. Current Vertical Deformation in the Fenwei Fault- depression Zone in Shanxi Province and Future Seismicity [J]. EARTHQUAKE, 2012, 32(4): 123-130.
[12]	LI Yan'e, CHEN Xue-zhong, WANG Heng-xin. Temporal and Spatial Variation of Apparent Stress in Sichuan Area before the M_S8.0 Wenchuan Earthquake [J]. EARTHQUAKE, 2012, 32(4): 113-122.
[13]	LUO Zhuo-li, WANG Wei-jun. Statistical Group Properties of Seismic Activities in Normal and Abnormal Conditions and Their Applications to Earthquake Prediction a Case Study of the 2008 Wenchuan Earthquake [J]. EARTHQUAKE, 2012, 32(3): 1-14.
[14]	NIU An-Fu, YAN Wei, ZHANG Ling-kong, JI Ping. On the Short-term Precursory Phenomena of Ground Deformation Associated with the 2008 M_S8.0 Wenchuan Earthquake [J]. EARTHQUAKE, 2012, 32(2): 52-63.
[15]	YANG Guo-hua, YANG Bo, ZHAN Wei, CHEN Xin, HUA Cai-hong, WANG Li. Spatial Distribution of Regional Horizontal Defor- mations before and after the Yushu and Wenchuan Earthquakes [J]. EARTHQUAKE, 2012, 32(2): 40-51.