2018年9月4日新疆伽师5.5级地震序列震源机制特征分析

doi:10.12196/j.issn.1000-3274.2022.03.006

Abstract

Abstract: Based on the broadband waveform recorded by Xinjiang Digital Seismic Network, we inversed the focal mechanism solutions of foreshock, mainshock, and 15 times M_S≥3.0 aftershock sequences of the Jiashi M_S5.5 on the September 4, 2018 by using CAP mothod and P-wave intial motion method. With the results collected from different research institutions, determination of central of focal mechanism solution is determined with the smallest square difference from several focal mechanisms of the same earthquake. The central focal mechanism of Jiashi M_S5.5 mainshock had the Nodal planeⅠwith strike 144.22°/dip 87.13°/rake -175.78°; Nodal plane Ⅱ with strike 54.01°/dip 85.79°/rake -2.88°, the best centroid depth of 18 km. Those indicate that the earthquake is a strike-slip event. Calculating the results of all focal mechanism solutions, strike-slip earthquakes account for the largest proportion of all earthquakes. At the same time, other focal mechanism types of earthquakes also exist, indicating that the area has a complex stress field environment. Combined with the geological structure and focal mechanism solution type of the focal area, it is inferred that Jiashi M_S5.5 is a new rupture event of the Xia Suhong blinded fault, and the node plane I is determined to be its seismogenic fault plane. A preliminary analysis is made on the similarities and differences between the sequence of this Jiashi earthquake with other Jiashi strong seismic groups in 1997—1998 and 2003. Inversion of the stress field in the focal area shows that the stress field is a strike-slip stress system. The azimuth of the maximum principal stress σ₁ in the region is NEE-SWW, and the stress shape ratio (R) is 0.1, indicating that the tensile stress axis is determined, and the focal area is mainly affected by the tension in the EW direction. Combined with the stress field inversion results of several strong earthquakes from 1997 to 2003, the direction of maximum principal stress caused by this earthquake rotates clockwise, which has certain indication significance for the subsequent strong earthquakes.

Key words: The 2018 Jiashi M_S5.5 earthquake sequence, Focal mechanism, Stress field

CLC Number:

P315.7

SUN Zhao-jie, LI Jin. Analysis of the Focal Mechanism of Jiashi, Xinjiang, M_S5.5 Earthquake Sequences on September 4, 2018[J]. EARTHQUAKE, 2022, 42(3): 81-98.

References

[1] 赵翠萍, 陈章立, 郑斯华, 等. 伽师震源区中等强度地震矩张量反演及其应力场特征[J]. 地球物理学报, 2008, 51(3): 782-792.
ZHAO Cui-ping, CHEN Zhang-li, ZHENG Si-hua, et al. Moment inversion of moderate earthquakes and the locally perturbed stress field in the Jiashi source region[J]. Chinese Journal of Geophysics, 2008, 51(3): 782-792 (in Chinese).
[2] 潘素珍, 张先康, 杨卓欣, 等. 伽师强震群区上地壳三维速度层析成像人工爆破和天然地震的联合反演[J]. 地球物理学报, 2007, 50(5): 1456-1463.
PAN Su-zhen, ZHANG Xian-kang, YANG Zhuo-xin, et al. Tomographic determination of the upper crustal structure in Jiashi strong earthquake swarm regionjoint inversion of explosion and earthquake data[J]. Chinese Journal of Geophysics, 2007, 50(5): 1456-1463 (in Chinese).
[3] 杨卓欣, 赵金仁, 张先康, 等. 伽师强震群区上地壳三维速度层析成像[J]. 地震学报, 2002, 24(2): 153-161.
YANG Zhuo-xin, ZHAO Jin-ren, ZHANG Xian-kang, et al. Tomographic determination of the upper crustal structure in Jiashi strong earthquake swarm region[J]. Acta Seismologica Sinica, 2002, 24(2): 153-161 (in Chinese).
[4] 周仕勇, 许忠淮, 陈晓非. 伽师强震群震源特征及震源机制力学成因分析[J]. 地球物理学报, 2001, 44(5): 654-662.
ZHOU Shi-yong, XU Zhong-huai, CHEN Xiao-fei. Analysis on the source characteristic of the 1997 Jiashi swarm, western China[J]. Chinese Journal of Geophysics, 2001, 44(5): 654-662 (in Chinese).
[5] 单新建, 何玉梅, 朱燕, 等. 新疆伽师强震群的震源破裂特征[J]. 地震地质, 2002, 24(1): 59-68.
SHAN Xin-jian, HE Yu-mei, ZHU Yan, et al. Charateristic of focal rupture of the Jiashi strong earthquake swarm[J]. Seismology and Geology, 2002, 24(1): 59-68 (in Chinese).
[6] 刁桂苓, 王海涛, 高国英, 等. 伽师强震系列应力场的转向过程[J]. 地球物理学报, 2005, 48(5): 1062-1068.
DIAO Gui-ling, WANG Hai-tao, GAO Guo-ying, et al. A deflection process for stress field of the Jiashi strong earthquake sequence[J]. Chinese Journal of Geophysics, 2005, 48(5): 1062-1068 (in Chinese).
[7] 周仕勇, 许忠淮. 由震源谱推断1997年新疆伽师强震群破裂特性[J]. 地震学报, 2000, 22(2): 113-124.
ZHOU Shi-yong, XU Zhong-huai. Inferring the rupture characteristics of the 1997 Jiashi strong eathquake swarm in Xinjiang from the spectrum[J]. Acta Seismologica Sinica, 2000, 22(2): 113-124 (in Chinese).
[8] 沈军, 陈建波, 王翠, 等. 2003年2月24日新疆巴楚—伽师6.8级地震发震构造[J]. 地震地质, 2006, 28(2): 205-212.
SHEN Jun, CHEN Jian-bo, WANG Cui, et al. The seismogenic tectonics of the M_S6.8 Bachu-Jiashi, Xinjiang earthquake in Feb.24, 2003[J]. Seismology and Geology, 2006, 28(2): 205-212 (in Chinese).
[9] 徐锡伟, 张先康, 冉勇康, 等. 南天山地区巴楚-伽师地震(M_S6.8)发震构造初步研究[J]. 地震地质, 2006, 28(2): 161-178.
XU Xi-wei, ZHANG Xian-kang, RAN Yong-kang, et al. The preliminary study on seismotectonics of the 2003 AD Bachu-Jiashi earthquake (M_S6.8), Southern Tian Shan[J]. Seismology and Geology, 2006, 28(2): 161-178 (in Chinese).
[10] 赵俊猛, 卢芳, 嘉士旭. 伽师强震群的深部动力学条件[J]. 地震研究, 2006, 29(4): 338-343.
ZHAO Jun-meng, LU Fang, JIA Shi-xu. Deep geodynamic condition for the Jiashi strong earthquake swarms[J]. Journal of Seismological Researth, 2006, 29(4): 338-343 (in Chinese).
[11] Zhao L S, Helmberger D V. Source estimation from broadband regional seismograms[J]. Bulletin of the Seismological Soclety of America, 1994, 84(1): 91-104.
[12] Zhu L P, Helmberger D V. Advancement in source estimation techniques using broadband regional seismograms[J]. Bulletin of the Seismological Soclety of America, 1996, 86(5): 1634-1641.
[13] 吕坚, 郑勇, 倪四道, 等. 2005年11月26日九江—瑞昌M_S5.7、 M_S4.8地震的震源机制与发震构造研究[J]. 地球物理学报, 2008, 51(1): 158-164.
Lü Jian, ZHENG Yong, NI Si-dao, et al. Focal mechanisms and seismogenic structures of the M_S5.7 and M_S4.8 Jiujiang-Ruichang earthquake of Nov.26, 2005[J]. Chinese Journal of Geophysics, 2008, 51(1): 158-164 (in Chinese).
[14] 郑勇, 马宏生, 吕坚, 等. 汶川地震强余震(M_S≥5.6)的震源机制解及其发震构造的关系[J]. 中国科学D辑: 地球科学, 2009, 39(4): 413-426.
ZHENG Yong, MA Hong-sheng, Lü Jian, et al . The focal mechanism of strong aftershocks (M_S≥5.6) of the Wenchuan earthquake and the relationship between the seismogenic structure[J]. Science in China Series D: Earth Science, 2009, 39(4): 413-426 (in Chinese).
[15] 韩立波, 蒋长胜, 包丰. 2010年河南太康M_S4.6地震序列震源参数的精确定位[J]. 地球物理学报, 2012, 55(9): 2973-2981.
HAN Li-bo, JIANG Chang-sheng, BAO Feng. Source parameter determination of 2010 Taikang M_S4.6 earthquake sequences[J]. Chinese Journal of Geophysics, 2012, 55(9): 2973-2981 (in Chinese).
[16] 李金, 王琼, 吴传勇, 等. 2015年7月3日皮山6.5级地震发震构造初步研究[J]. 地球物理学报, 2015, 59(8): 2859-2870.
LI Jin, WANG Qiong, WU Chuan-yong, et al. Preliminary study for seismogenic structure of Pishan M_S6.5 earthquake of July 3, 2015[J]. Chinese Journal of Geophysics, 2015, 59(8): 2859-2870 (in Chinese).
[17] 张致伟, 周龙泉, 程万正, 等. 庐山M_W6.6地震序列的震源机制及震源区应力场[J]. 地球科学: 中国地质大学学报, 2015, 40(10): 1710-1722.
ZHANG Zhi-wei, ZHOU Long-quan, CHEN Wan-zheng, et al. Focal mechanism solutions of Lushan M_W6.6 earthquake sequence and stress field for aftershock zone[J]. Earth Science: Journal of China University of Geosciences, 2015, 40(10): 1710-1722 (in Chinese).
[18] 郑建常, 林眉, 王鹏, 等. CAP方法反演震源机制的误差分析: 以胶东半岛两次显著中等地震为例[J]. 地球物理学报, 2015, 58(2): 453-462.
ZHENG Chang-jian, LIN Mei, WANG Peng, et al. Error analysis for focal mechanism from CAP method inversion: An example of 2 moderate earthquakes in Jiaodong Peninsula[J]. Chinese Journal of Geophysics, 2015, 58(2): 453-462 (in Chinese).
[19] 孙昭杰, 李金, 黄瑜, 等. 2015年新疆皮山6.5级地震序列震源机制特征分析[J]. 中国地震, 2018, 34(1): 71-82.
SUN Zhao-jie, LI Jin, HUANG Yu, et al. Analysis of the focal mechanism of the 2015 Pishan, Xinjiang, M_S6.5 mainshock and aftershock sequences[J]. Earthquake Research in China, 2018, 34(1): 71-82 (in Chinese).
[20] 万永革. 地震学导论[M]. 北京: 科学出版社, 2016.
WAN Yong-ge. Introduction to seismology[M]. Beijing: Science Press, 2016 (in Chinese).
[21] Xie Z J, Zheng Y, Yao H J, et al. Preliminary anslysis on the source properties and seismogenic structure of the 2017 M_S7.0 Jiuzhaigou earthquake[J]. Science China Earth Sciences, 2018, 61: 339-352.
[22] 万永革. 同一地震多个震源机制中心解的确定[J]. 地球物理学报, 2019, 62(12): 4718-4728.
WAN Yong-ge. Determination of center of several focal mechanisms of the same earthquake[J]. Chinese Journal of Geophysics, 2019, 62(12): 4718-4728 (in Chinese).
[23] Zoback M L. First- and second-order patterns of stress in the lithosphere: The world stress map project[J]. Journal of Geophysical Research: Solid Earth, 1992, 97(B8): 11703-11728.
[24] 宋春燕, 高荣, 刘建明, 等. 2018年9月4日新疆伽师M_S5.5地震序列及发震构造讨论[J]. 中国地震, 2019, 35(2): 256-268.
SONG Chun-yan, GAO Rong, LIU Jian-ming, et al Discussion on earthquake sequence and seismogenic structure for the Jiashi M_S5.5 earthquake on September 4, 2018, Xinjiang[J]. Earthquake Research in China, 2019, 35(2): 256-268 (in Chinese).
[25] 高国英, 王海涛, 聂晓红, 等. 新疆伽师及周围构造应力场区域特征探讨[J]. 地震地质, 2007, 29(1): 77-87.
GAO Guo-ying, WANG Hai-tao, NIE Xiao-hong, et al. The research on regional characteristics of tectonic stress field in Jiashi, Xinjiang and its surrrounding areas[J]. Seismology and Geology, 2007, 29(1): 77-87 (in Chinese).
[26] 杨欣, 高国英. 1997年伽师强震群序列特征和震源机制的初步研究[J]. 地震学报, 1998, 20(6): 573-579.
YANG Xin, GAO Guo-ying. Apreliminary study in the sequence characteristics and focal mechanism of the Jiashi strong earthquake swarm in 1997[J]. Acta Seismologica Sinica, 1998, 20(6): 573-579 (in Chinese).
[27] 刘启元, 陈九辉, 李顺成, 等. 新疆伽师强震群区三维地壳上地幔S波速度结构及其地震成因的探讨[J]. 地球物理学报, 2000, 43(3): 356-365.
LIU Qi-yuan, CHEN Jiu-hui, LI Shun-cheng, et al. Passive seismic experiment in Xinjiang-Jiashi strong earthquake region and discussion on its seismic genesis[J]. Chinese Journal of Geophysics, 2000, 43(3): 356-365 (in Chinese).
[28] 张培震, 邓起东, 杨晓平, 等. 天山的晚新生代构造变形及其地球动力学问题[J]. 中国地震, 1996, 12(2): 23-36.
ZHANG Pei-zhen, DENG qi-dong, YANG Xiao-ping, et al. Late cenozoic tectonic deformation and mechanism along the Tianshan Mountain, Northwestern China[J]. Earthquake Research in China, 1996, 12(2): 23-36 (in Chinese).
[29] Wan Y G, Sheng S Z, Huang J C, et al. The grid search algorithm of teconic stress tensor based on focal mechanism data its application in the boundary zone of China, Vietnam and Laos[J]. Journal of Earth Science, 2016, 27: 777-785.
[30] 万永革. 联合采用定性和定量断层资料的应力张量反演方法及在乌鲁木齐地区的应用[J]. 地球物理学报, 2015, 58(9): 3144-3156.
WAN Yong-ge. A grid search method for determination of tectonic stress tensor using qualitative data of active faults and its application to the Urumqi area[J]. Chinese Journal of Geophysics, 2015, 58(9): 3144-3156 (in Chinese).
[31] Gephart J W, Forsyth D W. An improved method for determining the regional stress tentor using earthquake focal mechanism data: Application to the San Fernando earthquake sequence[J]. Journal of Geophysical Research, 1984, 89(B11): 9305-9320.
[32] 万永革. 震源机制与应力体系关系模拟研究[J]. 地球物理学报, 2020, 63(6): 2281-2296.
WAN Yong-ge. Simulation on relationship between stress regimes and focal mechanisms of earthquakes[J]. Chinese Journal of Geophysics, 2020, 63(6): 2281-2296 (in Chinese).
[33] 万永革, 盛书中, 许雅儒, 等. 不同应力状态和摩擦系数对综合P波辐射花样影响的模拟研究[J]. 地球物理学报, 2011, 54(4): 994-1001.
WAN Yong-ge, SHENG shu-zhong, XU Ya-ru, et al. Effect of stress ratio and friction coefficient on composite P wave radiation patterns[J]. Chinese Journal of Geophysics, 2011, 54(4): 994-1001 (in Chinese).
[34] 黄冀超, 万永革, 盛书中, 等. 汤加—克马徳克俯冲带现今非均匀应力场特征及其动力学意义[J]. 地球物理学报, 2016, 59(2): 578-592.
HUANG Ji-chao, WAN Yong-ge, SHENG Zhong-shu, et al. Heterogeneity of present-day stress field in the Tonga-Kermadec subduction zone and its geodynamic significance[J]. Chinese Journal of Geophysics, 2016, 59(2): 578-592 (in Chinese).
[35] 崔效峰. 伽师及周围地区现代构造应力场特征研究[J]. 地震学报, 2006, 28(4): 347-356.
CUI Xiao-feng. Characteristics of recent tectonic stress field in Jiashi, Xinjiang and adjacent regions[J]. Acta Seismologica Sinica, 2006, 28(4): 347-356 (in Chinese).
[36] 高国英, 聂晓红, 夏爱国. 2003年伽师6.8级地震序列特征和震源机制的初步研究[J]. 中国地震, 2004, 20(2): 179-186.
GAO Guo-ying, NIE Xiao-hong, XIA Ai-guo. Preliminary study on characteristics of the Jiashi earthquake sequence with M_S6.8 and its focal mechanism solution in 2003[J]. Earthquake Research in China, 2004, 20(2): 179-186 (in Chinese).
[37] 崔效锋, 谢富仁. 1976年唐山地震前后华北地区现代构造应力场的时空变化特征[J]. 中国地震, 2001, 17(3): 280-288.
CUI Xiao-feng, XIE Fu-ren. The space-time variation of present tectonic stress field in North China before and after 1976 Tangshan earthquake[J]. Earthquake Research in China, 2001, 17(3): 280-288 (in Chinese).
[38] 刁桂苓, 于利民, 李钦祖. 强震前后震源区应力场变化一例[J]. 地震学报, 1994, 16(1): 64-69.
DIAO Gui-ling, YU Li-min, LI Qin-zu. An example of stress field changes in the focal area before and after a strong earthquake[J]. Acta Seismologica Sinica, 1994, 16(1): 64-69 (in Chinese).
[39] 刁桂苓, 徐锡伟, 陈于高, 等. 汶川M_W7.9和集集M_W7.6地震前应力场转换现象及其可能的前兆意义[J]. 地球物理学报, 2011, 54(1): 128-136.
DIAO Gui-ling, XU Xi-wei, CHEN Yu-gao, et al. The precursory significance of tectonic stress field transformation before the Wenchuan M_W7.9 earthquake and the Chi-Chi M_W7.6 earthquake[J]. Chinese Journal of Geophysics, 2011, 54(1): 128-136 (in Chinese).
[40] 王凯英, 马瑾, 顾国华, 等. 1996年川滇地区发生的一次应力转向事件[J]. 地学前缘, 2003, 10(特刊): 233-239.
WANG Kai-ying, MA Jin, GU Guo-hua, et al. Rotation of stress axis in Sichuan-Yunnan region in 1996[J]. Earth Science Frontiers, 2003, 10(Special): 233-239 (in Chinese).

Analysis of the Focal Mechanism of Jiashi, Xinjiang, M_S5.5 Earthquake Sequences on September 4, 2018

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Analysis of the Focal Mechanism of Jiashi, Xinjiang, MS5.5 Earthquake Sequences on September 4, 2018

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Analysis of the Focal Mechanism of Jiashi, Xinjiang, M_S5.5 Earthquake Sequences on September 4, 2018