2020年新疆于田MS6.4地震发震断层及孕震机制研究

doi:10.12196/j.issn.1000-3274.2021.02.007

Abstract

Abstract: By the seismic phase and waveform data of the Yutian M_S6.4 earthquake sequence occurred on June 26th, 2020, earthquakes are relocated and the focal mechanism solutions of moderate and strong earthquakes are inversed. Using the Global Centroid-Moment-Tensor (GCMT) data from 2008 to present, the stress field in the boundary area between the West Kunlun block and the Qaidam-Qilian block is inversed. The results show that the seismogenic fault of Yutian M_S6.4 earthquake sequence on June 26, 2020 is a strike-SSW, dipping NWW normal fault, and the occurrence of M_S6.4 earthquake may be related to the rupture of normal fault in front of the Ulugh Muztagh mountain. The boundary area between the West Kunlun block and the Qaidamu-Qilian block is in the consistent status with the east-west tensile stress model, which supports the eastward movement model that the Qaidamu-Qilian block delineated by the large strike-slip fault in the northern part of the Qinghai-Tibet Plateau.

Key words: Earthquake fault, Seismogenic mechanism, The Yutian M_S6.4 earthquake in Xinjiang in 2020

CLC Number:

P315.7

WANG Qin-cai, LI Jun, ZHANG Jin-chuan. The Earthquake Fault and Seismogenic Mechanism of the Yutian M_S6.4 Earthquake in Xinjiang, China in 2020[J]. EARTHQUAKE, 2021, 41(2): 92-101.

References

[1] 徐锡伟, 谭锡斌, 吴国栋, 等. 2008年于田M_S7.3地震地表破裂带特征及其构造属性讨论[J]. 地震地质, 2011, 33(2): 462-471.
XU Xi-wei, TAN Xi-bin, WU Guo-dong, et al. Surface rupture features of the 2006 Yutian M_S7.3 earthquake and its tectonic nature[J]. Seismology and Geology, 2011, 33(2): 462-471 (in Chinese).
[2] Xu X W, Tan X B, Yu G H, et al. Normal- and oblique-slip of the 2008 Yutian earthquake: Evidence for eastward block motion, northern Tibetan Plateau[J]. Tectonophysics, 2013, 584: 152-165.
[3] 洪顺英, 申旭辉, 单新建, 等.基于升降轨ASAR的于田M_S7.3级地震同震形变场信息提取与分析[J]. 国土资源遥感, 2010, 87(4): 98-102.
HONG Sun-ying, SHEN Xu-hui, SHAN Xin-jian, et al. The calculation and analysis of the co-seismic deformation field of Yutian M_S7.3 earthquake basing on the ascending and descending orbit ASAR data[J]. Remote Sensing for Land & Resources, 2010, 87(4): 98-102 (in Chinese).
[4] Li H B, Pan J W, Lin A M, et al. Coseismic surface ruptures associated with the 2014 M_W6.9 Yutian earthquake on the Altyn Tagh Fault, Tibetan Plateau[J]. Bulletin of the Seismological Society of America, 2016, 106(2): 595-608.
[5] 房立华, 吴建平, 王未来, 等. 2014年新疆于田M_S7.3级地震序列重定位[J]. 地球物理学报, 2015, 58(3): 802-808.
Fang Li-hua, Wu Jian-ping, Wang Wei-lai, et al. Relocation of the 2014 M_S7.3 earthquake sequence in Yutian, Xinjiang[J]. Chinese Journal of Geophysics, 2015, 58(3): 802-808 (in Chinese).
[6] 邓起东, 张培震, 冉勇康, 等. 中国活动构造基本特征[J]. 中国科学(D辑), 2002, 32(12): 1020-1030.
DENG Qi-dong, ZHANG Pei-zhen, RAN Yong-kang, et al. Basic characteristics of active tectonics in China[J]. Scientia Sinica (Series D), 2002, 32(12): 1020-1030 (in Chinese).
[7] 袁兆德, 刘静, 李雪, 等. 2014年新疆于田M_S7.3地震地表破裂带精细填图及其破裂特征[J]. 中国科学: 地球科学, 2021, 51(2): 276-298.
YUAN Zhao-de, LIU Jing, LI Xue, et al. Detailed mapping of the surface rupture of the 12 February 2014 Yutian M_S7.3 earthquake, Altyn Tagh fault, Xinjiang, China[J]. Science China Earth Sciences, 2021, 64(1): 127-147.
[8] 顾功叙. 中国地震目录(公元前1831—公元1969)[M]. 北京: 科学出版社, 1983.
GU Gong-xu. Earthquake Catalogue in China (1831 B.C.—1969 A.D.)[M]. Beijing: Science Press, 1983 (in Chinese).
[9] Waldhauser F, Ellsworth W L. A double-difference earthquake location algorithm: Method and application to the Northern Hayward Fault, California[J]. Bulletin of the Seismological Society of America, 2000, 90(6): 1353-1368.
[10] 黄媛, 吴建平, 张天中, 等. 汶川8.0级大地震及其余震序列重定位研究[J]. 中国科学(D辑), 2008, 38(10): 1242-1249.
HUANG Yuan, WU Jian-ping, ZHANG Tian-zhong, et al. Relocation of the M8.0 Wenchuan earthquake and its aftershock sequence[J]. Science in China (Series D), 2008, 38(10): 1242-1249 (in Chinese).
[11] 王勤彩, 王中平, 张金川, 等. 2010年4月玉树M_S7.3地震序列的断层结构[J]. 地球物理学报, 2015, 58(6): 1931-1940.
WANG Qin-cai, WANG Zhong-ping, ZHANG Jin-chuan, et al. Fault structure of M_S7.3 Yushu earthquake sequence in April, 2010[J]. Chinese Journal of Geophysics, 58(6): 1931-1940 (in Chinese).
[12] 李秋生, 卢德源, 高锐, 等. 横跨西昆仑—塔里木接触带的爆炸地震探测[J]. 中国科学(D辑), 2000, 30(增刊): 16-21.
LI Qiu-sheng, LU De-yuan, GAO Rui, et al. Explosion seismic probing across the West Kunlun-Tarim contact zone[J]. Science in China (Series D), 2000, 30(S1): 16-21 (in Chinese).
[13] 董彦芳, 洪顺英. 2020年6月26日于田6.4级地震InSAR同震形变分析[R]. 中国地震局地震预测研究所2020年M_S6.4级地震虚拟科考报告.
DONG Yan-fang, HONG Sun-ying. InSAR co-seismic deformation analysis of the Yutian M6.4 earthquake on June 26, 2020[R]. Report of Virtual Scientific Investigation of M_S6.4 Earthquake in 2020. Institute of Earthquake Forecasting, CEA (in Chinese).
[14] Gephart J W, Forsyth D W. An improved method for determining the regional stress tensor using earthquake focal mechanism data: Application to the San Fernando earthquake sequence[J]. Journal of Geophysical Research, 1984, 89(B11): 9305-9320.
[15] Gephart J W. Stress and the direction of slip on fault planes[J]. Tectonics, 1990, 9(4): 845-858.
[16] Romanowicz B, Dreger D S, Pasyanos M, et al. Monitoring of strain release in central and northern California using broadband data[J]. Geophysical Research Letters, 1993, 20(15): 1634-1646.
[17] 王勤彩, 陈章立, 郑斯华. 汶川大地震余震序列震源机制的空间分段特征[J]. 科学通报, 2009, 54(16): 2348-2354.
WANG Qin-cai, CHEN Zhang-li, ZHENG Si-hua. Spatial segmentation characteristic of focal mechanism of aftershock sequence of Wenchuan Earthquake[J]. Chinese Science Bulletin, 2009, 54: 2263-2270.
[18] Zoback M L. First- and second-order patterns of stress in the lithosphere: The world stress map project[J]. Journal of Geophysical Research, 1992, 97(B8): 11703-11728.
[19] 田勤俭, 袁兆德, 王林, 等. 2020年6月26日新疆于田M_S6.4地震区域构造、构造地貌及发震构造特征[R]. 中国地震局地震预测研究所2020年M_S6.4级地震虚拟科考报告.
TIAN Qin-jian, YUAN Zhao-de, WANG Lin, et al. The characteristics of regional tectonics, tectonic geomorphology and seismogenic structure of the M_S6.4 earthquake in Yutian, Xinjiang, on 26 June 2020[R]. Report of Virtual Scientific Investigation of M_S6.4 Earthquake in 2020. Institute of Earthquake Forecasting, CEA (in Chinese).
[20] 李海兵, 潘家伟, 孙知明, 等, 2014年于田M_S7.3地震地表破裂特征及其发震构造[J]. 地质学报, 2015, 89(1): 180-194.
LI Hai-bing, PAN Jia-wei, SUN Zhi-ming, et al. Seismogenic structure and surface rupture characteristics of the 2014 M_S7.3 Yutian earthquake[J]. Acta Geologica Sinica, 2015, 89(1): 180-194 (in Chinese).
[21] Zhang H, Ge Z X. Stepover rupture of the 2014 M_W7.0 Yutian, Xinjiang, earthquake[J]. Bulletin of the Seismological Society of America, 2017, 107(2): 581-591.

The Earthquake Fault and Seismogenic Mechanism of the Yutian M_S6.4 Earthquake in Xinjiang, China in 2020

PDF (PC)

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 2

Recommended Articles

Metrics

Comments

[1]	GENG Shuang, WANG Lin, TIAN Qin-jian, XU Yue-ren, LI Wen-qiao, YUAN Zhao-de. Study on Seismogenic Structure of the Yutian M_S6.4 Earthquake in Xinjiang in 2020 [J]. EARTHQUAKE, 2021, 41(2): 1-13.
[2]	ZHANG Hui, JIAO Ming-ruo, LIU Xia. Numerical Simulations of the Influencing Mechanism of the Pacific Plate Subduction to NE China on Deep and Shallow Earthquakes [J]. EARTHQUAKE, 2012, 32(2): 135-144.

The Earthquake Fault and Seismogenic Mechanism of the Yutian MS6.4 Earthquake in Xinjiang, China in 2020

PDF (PC)

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 2

Recommended Articles

Metrics

Comments

The Earthquake Fault and Seismogenic Mechanism of the Yutian M_S6.4 Earthquake in Xinjiang, China in 2020