SEISMOGENIC STRUCTURE OF THE M4.9 AND M5.1 LITANG EARTHQUAKES ON 23 SEPTEMBER 2016 IN SOUTHWESTERN CHINA

doi:10.3969/j.issn.0253-4967.2017.05.006

Abstract

Abstract: On 23 September 2016, two earthquakes with magnitude of M4.9 and M5.1 occurred successively near Litang city in Sichuan Province, southwestern China. These two events are located between two large-scale fault zones, i.e., the Jinshajiang and Litang faults, in the northwest of the Sichuan-Yuannan active block, eastern Tibetan plateau. Based on the phase data and waveform data from the Sichuan regional seismic network, the M4.9 and M5.0 mainshocks and 390 aftershocks have been relocated using the multi-step locating method, and the focal mechanism solutions and centroid depths for the two mainshocks were calculated by the CAP waveform inversion method. From the spatial distribution of the relocated aftershocks and fault plane solutions of the two mainshocks, combining with the seismic intensity map and tectonic setting, we suggested that the two earthquakes were generated by the E-W trending northward dipping Hagala fault. The nodal plane consistent with the strike and dip of the Hagala fault is interpreted as the coseismic rupture plane with a dip angle of 44° for both the M4.9 and M5.1 earthquakes. And we inferred that the M4.9 and M5.1 earthquakes may be resulted from the nearly E-W striking Hagala normal faulting in the upper crust between the Litang and Batang regions due to the continuous eastward extrusion of the material of the Qiangtang block in the west.

Key words: M4.9 and M5.1 Litang earthquakes, relocation, focal mechanism, seismogenic structure

摘要： 2016年9月23日，在四川西部理塘县相继发生M4.9和M5.1地震，震中位于青藏高原东缘川滇块体西北部金沙江断裂带与理塘断裂带所夹持的区域。文中基于四川区域地震台网提供的震相报告和波形资料，采用多阶段定位方法，对理塘M4.9和M5.1主震及余震序列进行了重新定位。同时，利用CAP波形反演方法，获得了这2个主震的震源机制解、震源矩心深度与矩震级。根据重定位后的余震空间分布形态、M4.9和M5.1主震的震源机制解，结合等震线形态及震中附近主要构造的展布，分析认为，近EW走向、倾向N的哈嘎拉断裂带为理塘M4.9和M5.1地震的发震构造，与该断裂带走向和倾向一致的节面Ⅰ为同震断层面，断面倾角44°。理塘M4.9和M5.1地震可能是在西侧羌塘块体物质持续E向挤入作用下、位于理塘-巴塘地区上地壳内的近EW向哈嘎拉断裂张性运动所致。

关键词: 理塘M4.9和M5.1地震, 重新定位, 震源机制, 发震构造

CLC Number:

P315.63

YI Gui-xi, LONG Feng, LIANG Ming-jian, ZHANG Zhi-wei, ZHAO Min, QI Yu-ping, GONG Yue, QIAO Hui-zhen, WANG Zhi, WANG Si-wei, SHUAI Li-rong. SEISMOGENIC STRUCTURE OF THE M4.9 AND M5.1 LITANG EARTHQUAKES ON 23 SEPTEMBER 2016 IN SOUTHWESTERN CHINA[J]. SEISMOLOGY AND GEOLOGY, 2017, 39(5): 949-963.

易桂喜, 龙锋, 梁明剑, 张致伟, 赵敏, 祁玉萍, 宫悦, 乔慧珍, 汪智, 王思维, 帅莉蓉. 2016年9月23日四川理塘M4.9和M5.1地震发震构造分析[J]. 地震地质, 2017, 39(5): 949-963.

References

常利军, 王椿镛, 丁志峰. 2008. 四川及邻区上地幔各向异性研究［J］. 中国科学(D辑), 38(12):1589-1599. doi:10.1360/zd2008-38-12-1589. CHANG Li-jun, WANG Chun-yong, DING Zhi-feng. 2008. Seismic anisotropy of upper mantle in Sichuan and adjacent regions［J］. Science in China(Ser D), 51(12):1683-1693. 陈智梁, 沈凤, 刘宇平, 等. 1998. 青藏高原东部地壳运动的GPS测量［J］. 中国地质, (5):32-35. CHEN Zhi-liang, SHEN Feng, LIU Yu-ping, et al. 1998. GPS measurements of crustal movements in eastern Tibet［J］. Geology in China, (5):32-35(in Chinese).
程佳, 徐锡伟, 甘卫军, 等. 2012. 青藏高原东南缘地震活动与地壳运动所反映的块体特征及其动力来源［J］. 地球物理学报, 55(4):1198-1212. doi:10.6038/j.issn.0001-5733.2012.04.016. CHENG Jia, XU Xi-wei, GAN Wei-jun, et al. 2012. Block model and dynamic implication from the earthquake activities and crustal motion in the southeastern margin of Tibetan plateau［J］. Chinese Journal of Geophysics, 55(4):1198-1212(in Chinese). 崔效锋, 谢富仁, 张红艳. 2006. 川滇地区现代构造应力场分区及动力学意义［J］. 地震学报, 28(5):451-461. CUI Xiao-feng, XIE Fu-ren, ZHANG Hong-yan. 2006. Recent tectonic stress field zoning in the Sichuan-Yunnan region and its dynamic implications［J］. Acta Seismologica Sinica, 28(5):451-461(in Chinese).
范莉苹, 吴建平, 房立华, 等. 2015. 青藏高原东南缘瑞利波群速度分布特征及其构造意义探讨［J］. 地球物理学报, 58(5):1555-1567. doi:10.6038/cjg20150509. FAN Li-ping, WU Jian-ping, FANG Li-hua, et al. 2015. The characteristic of Rayleigh wave group velocities in the southeastern margin of the Tibetan plateau and its tectonic implications［J］. Chinese Journal of Geophysics, 58(5):1555-1567(in Chinese). 高原, 吴忠良, 周蕙兰. 1998. 四川地区1989年中强地震系列的震源破裂研究［J］. 地震学报, 20(1):12-17. GAO Yuan, WU Zhong-liang, ZHOU Hui-lan. 1998. Source rupture of several strong earthquakes in 1989 in the Sichuan region of China［J］. Acta seismologica Sinica, 20(1):12-17(in Chinese).
国家地震局震害防御司. 1995. 中国历史强震目录［Z］. 北京:地震出版社. Department of Earthquake Disaster Prevention, China Earthquake Administration. 1995. The Catalogue of Chinese Historical Strong Earthquakes［Z］. Seismological Press, Beijing(in Chinese). 国家地震局震害防御司. 1999. 中国近代地震目录［Z］. 北京:中国科学技术出版社. Department of Earthquake Disaster Prevention, China Earthquake Administration. 1999. The Catalogue of Chinese Modern Earthquakes［Z］. Seismological Press, Beijing(in Chinese).
李煜航, 郝明, 季灵运, 等. 2014. 青藏高原东缘中南部主要活动断裂滑动速率及其地震矩亏损［J］. 地球物理学报, 57(4):1062-1078. doi:10.6038/cjg20140405. LI Yu-hang, HAO Ming, JI Ling-yun, et al. 2014. Fault slip rates and seismic moment deficits on major active faults in mid and south part of the eastern margin of the Tibet plateau［J］. Chinese Journal of Geophysics, 57(4):1062-1078(in Chinese). 龙锋, 张永久, 闻学泽, 等. 2010. 2008年8月30日攀枝花-会理6.1级地震序列M_L ≥ 4.0事件的震源机制解［J］. 地球物理学报, 53(12):2852-2860. LONG Feng, ZHANG Yong-jiu, WEN Xue-ze, et al. 2010. Focal mechanism solutions of M_L ≥ 4.0 events in the M_S6.1 Panzhihua-Huili earthquake sequence of August 30, 2008［J］. Chinese Journal of Geophysics, 53(12):2852-2860(in Chinese).
罗艳, 赵里, 曾祥方, 等. 2015. 芦山地震序列震源机制及其构造应力场空间变化［J］. 中国科学(D辑), 45(4):538-550. LUO Yan, ZHAO Li, ZENG Xiang-fang, et al. 2015. Focal mechanisms of the Lushan earthquake sequence and spatial variations of the tectonic stress field［J］. Science in China(Ser D), 58(7):1148-1159. 吕江宁, 沈正康, 王敏. 2003. 川滇地区现代地壳运动速度场和活动块体模型研究［J］. 地震地质, 25(4):543-554. doi:10.3969/j.issn.0253-4967.2003.04.003. LV Jiang-ning, SHEN Zheng-kang, WANG Min. 2003. Contemporary crustal deformation and active tectonic block model of the Sichuan-Yunnan region, China［J］. Seismology and Geology, 25(4):543-554(in Chinese).
裴锡瑜, 陈文德, 张家涛, 等. 1985. 利用重磁资料对四川西部地区地壳深部构造及其与地震关系的初步研究［J］. 四川地震, (2):16-22. PEI Xi-yu, CHEN Wen-de, ZHANG Jia-tao, et al. 1985. Research on the crust structure and earthquakes in the western Sichuan by gravity magnetic data［J］. Earthquake Research in Sichuan, (2):16-22(in Chinese). 四川省地震局. 1994. 1989年四川巴塘强震群［M］. 北京:地震出版社:119. Seismological Bureau of Sichuan Province. 1994. 1989 Batang Strong Earthquake Swarm in Sichuan Province［M］. Seismological Press, Beijing:119(in Chinese).
四川省地质局. 1980. 区域地质调查报告(1:20万)(编号H-47-ⅩⅥ)［M］. 北京:地质出版社:224. Geological Bureau of Sichuan Province. 1980. Regional Geological Survey Report(1:200000)(No. H-47-ⅩⅥ)［M］. Geological Press, Beijing:224(in Chinese). 石玉涛, 高原, 张永久, 等. 2013. 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, 56(2):481-494. doi:10.6038/cjg20130212. SHI Yu-tao, GAO Yuan, ZHANG Yong-jiu, et al. 2013. Shear-wave splitting in the crust in the eastern Songpan-Garzê block, Sichuan-Yunnan block and western Sichuan Basin［J］. Chinese Journal of Geophysics, 56(2):481-494(in Chinese).
徐锡伟, 闻学泽, 于贵华, 等. 2005. 川西理塘断裂带平均滑动速率、地震破裂分段与复发特征［J］. 中国科学(D辑), 36(6):540-551. XU Xi-wei, WEN Xue-ze, YU Gui-hua, et al. 2005. Average slip rates, earthquake rupture segmentation and recurrence behavior on the Litang fault zone, western Sichuan Province, China［J］. Science in China(Ser D), 48(8):1183-1196. 徐锡伟, 闻学泽, 郑荣章, 等. 2003. 川滇地区活动块体最新构造变动样式及其动力来源［J］. 中国科学(D辑), 33(S):151-162. XU Xi-wei, WEN Xue-ze, ZHENG Rong-zhang, et al. 2003. Pattern of latest tectonic motion and its dynamics for active blocks in the Sichuan-Yunnan region, China［J］. Science in China(Ser D), 46(S):210-226.
徐小明, 丁志峰, 叶庆东, 等. 2015. 基于Love波相速度反演南北地震带地壳上地幔结构［J］. 地球物理学报, 58(11):3928-3940. doi:10.6038/cjg20151104. XU Xiao-ming, DING Zhi-feng, YE Qing-dong, et al. 2015. The crustal and upper mantle structure beneath the north-south seismic zone from the inversion of Love wave phase velocity［J］. Chinese Journal of Geophysics, 58(11):3928-3940. doi:10.6038/cjg20151104(in Chinese). 易桂喜, 龙锋, Vallage A, 等. 2016b. 2013年芦山地震序列震源机制与震源区构造变形特征分析［J］. 地球物理学报, 59(10):3711-3731. doi:10.6038/cjg20161017. YI Gui-xi, LONG Feng, Vallage A, et al. 2016b. Focal mechanism and tectonic deformation in the seismogenic area of the 2013 Lushan earthquake sequence, southwestern China［J］. Chinese Journal of Geophysics, 59(10):3711-3731(in Chinese).
易桂喜, 龙锋, 闻学泽, 等. 2015. 2014年11月22日康定M6.3地震序列发震构造分析［J］. 地球物理学报, 58(4):1205-1219. doi:10.6038/cjg20150410. YI Gui-xi, LONG Feng, WEN Xue-ze, et al. 2015. Seismogenic structure of the M6.3 kangding earthquake sequence on 22 November 2014, southwestern China［J］. Chinese Journal of Geophysics, 58(4):1205-1219(in Chinese). 易桂喜, 龙锋, 张致伟. 2012. 汶川M_S8.0地震余震震源机制时空分布特征［J］. 地球物理学报, 55(4):1213-1227. doi:10.6038/j.issn.0001-5733.2012.04.017. YI Gui-xi, LONG Feng, ZHANG Zhi-wei. 2012. Spatial and temporal variations of focal mechanisms for aftershocks of the 2008 M_S8.0 Wenchuan earthquake［J］. Chinese Journal of Geophysics, 55(4):1213-1227(in Chinese).
易桂喜, 龙锋, 赵敏, 等. 2016a. 2014年10月1日越西M5.0地震震源机制与发震构造分析［J］. 地震地质, 38(4):1124-1136. doi:10.3969/j.issn.0253-4967.2016.04.025. YI Gui-xi, LONG Feng, ZHAO Min, et al. 2016a. Focal mechanism and seismogenic structure of the M5.0 Yuexi earthquake on 1 October 2014 in southwestern China［J］. Seismology and Geology, 38(4):1124-1136(in Chinese). 赵珠, 张润生. 1987. 四川地区地震波分区走时表的编制［J］. 四川地震, (3):29-35. ZHAO Zhu, ZHANG Run-sheng. 1987. The compilation of regional travel time table in Sichuan［J］. Earthquake Research in Sichuan, (3):29-35(in Chinese).
郑勇, 马宏生, 吕坚, 等. 2009. 汶川地震强余震(M_S ≥ 5.6)的震源机制解及其与发震构造的关系［J］. 中国科学(D辑), 39(4):413-426. ZHENG Yong, MA Hong-sheng, LV Jian, et al. 2009. Focal mechanism solutions of major aftershocks(M_S ≥ 5.6)of the 2008 Wenchuan earthquake and the implication for seismotectonics［J］. Science in China(Ser D), 52(6):739-753. 周荣军, 陈国星, 李勇, 等. 2005. 四川西部理塘-巴塘地区的活动断裂与1989年巴塘6.7级震群发震构造研究［J］. 地震地质, 27(1):31-43. doi:10.3969/j.issn.0253-4967.2005.01.004. ZHOU Rong-jun, CHEN Guo-xing, LI Yong, et al. 2005. Research on active faults in the Litang-Batang region, western Sichuan Province, and the seismogenic structure of the 1989 Batang M6.7 earthquake swarm［J］. Seismology and Geology, 27(1):31-43(in Chinese).
Bai D H, Unsworth M J, Meju M A, et al. 2010. Crustal deformation of the eastern Tibetan plateau revealed by magnetotelluric imaging［J］. Nature Geoscience, 3(5):358-362.
Gan W J, Zhang P Z, Shen Z K, et al. 2007. Present-day crustal motion within the Tibetan plateau inferred from GPS measurements［J］. Journal of Geophysical Research, 112(B8):B08416. doi:10.1029/2005JB004120.
Hauksson E, Yang W, Shearer P M. 2012. Waveform relocated earthquake catalog for southern California(1981 to June 2011)［J］. Bulletin of the Seismological Society of America, 102(5):2239-2244.
Huang H. 2014. Ambient noise tomography for wavespeed and anisotropy in the Crust of southwestern China. Massachusetts Institute of Technology, Massachusetts.
Kissling E. 1988. Geotomography with local earthquake data［J］. Review of Geophysics, 26(4):659-698.
Kissling E, Ellsworth W L, Eberhart-Phillips D, et al. 1994. Initial reference models in local earthquake tomography［J］. Journal of Geophysical Research, 99(B10):19635-19646.
Kissling E, Kradolfer U, Maurer H. 1995. VELEST user's guide-short introduction. Technical Report Institute of Geophysics. Institute of Geophysics, ETH Zurich.
Klein F W. 1989. HYPOINVERSE, a program for VAX computers to solve for earthquake location and magnitude. U.S. Geological Survey Open-File Report, 89-314. U.S. Geological Survey, 59.
Long F, Wen X Z, Ruan X, et al. 2015. A more accurate relocation of the 2013 M_S7.0 Lushan, Sichuan, China, earthquake sequence, and the seismogenic structure analysis［J］. Journal of Seismology, 19(3):653-665. doi:10.1007/s10950-015-9485-0.
Molnar P, Tapponnier P. 1975. Cenozoic tectonics of Asia:effects of a continental collision［J］. Science, 189(4201):419-426.
Replumaz A, Tapponnier P. 2003. Reconstruction of the deformed collision zone Between India and Asia by backward motion of lithospheric blocks［J］. Journal of Geophysical Research, 108(B6):2285. doi:10.1029/2001JB000661.
Rubin A M. 2002. Aftershocks of microearthquakes as probes of the mechanics of rupture［J］. Journal of Geophysical Research, 107(B7):2142. doi:10.1029/2001JB000496.
Styron R, Taylor M, Okoronkwo K. 2010. Database of active structures from the Indo-Asian Collision［J］. Eos, Transactions American Geophysical Union, 91(20):181-182.
Tan Y, Zhu L P, Helmberger D V, et al. 2006. Locating and modeling regional earthquakes with two stations［J］. Journal of Geophysical Research, 111(B11):B01306. doi:10.1029/2005JB003775.
Tapponnier P, Peltzer G, Le Dain A Y, et al. 1982. Propagating extrusion tectonics in Asia:new insights from simple experiments with plasticine［J］. Geology, 10(12):611-616.
Waldhauser F, Ellworth W L. 2000. A double-difference earthquake location algorithm:Method and application to the northern Hayward fault, California［J］. Bulletin of the Seismological Society of America, 90(6):1353-1368.
Xie Z J, Jin B K, Zheng Y, et al. 2013. Source parameters inversion of the 2013 Lushan earthquake by combining teleseismic waveforms and local seismograms［J］. Science China(Ser D), 56(7):1177-1186.
Xie Z J, Zheng Y, Liu C L, et al. 2015. Source parameters of the 2014 M_S6.5 Ludian earthquake sequence and their implications on the seismogenic structure［J］. Seismological Research Letters, 86(6):1614-1621.
Yi S, Freymueller J T, Sun W K. 2016. How fast is the middle-lower crust flowing in eastern Tibet?A constraint from geodetic observations［J］. Journal of Geophysical Research, 121(9):6903-6915. doi:10.1002/2016JB ￣ 013151.
Zhang P Z, Shen Z K, Wang M, et al. 2004. Continuous deformation of the Tibetan plateau from global positioning system data［J］. Geology, 32(9):809-812.
Zhang P Z, Wen X Z, Shen Z K, et al. 2010. Oblique, high-angle, listric-reverse faulting and associated development of strain:The Wenchuan earthquake of May 12, 2008, Sichuan, China［J］. Annual Review of Earth and Planetary Sciences, 38:353-382.
Zhao L S, Helmberger D V. 1994. Source estimation from broadband regional seismograms［J］. Bulletin of the Seismological Society of America, 84(1):91-104.
Zhu L P, Helmberger D V. 1996. Advancement in source estimation techniques using broadband regional seismograms［J］. Bulletin of the Seismological Society of America, 86(5):1634-1641.

[1]	LIU Bai-yun, ZHAO Li, LIU Yun-yun, WANG Wen-cai, ZHANG Wei-dong. THE RESEARCH ON RELOCATION AND FAULT PLANE SOLUTION AND GEOMETRIC MEANING OF THE MADUO M7.4 EARTHQUAKE ON 22 MAY 2021 [J]. SEISMOLOGY AND GEOLOGY, 2023, 45(2): 500-516.
[2]	ZHAO De-zheng, QU Chun-yan, ZHANG Gui-fang, GONG Wen-yu, SHAN Xin-jian, ZHU Chuan-hua, ZHANG Guo-hong, SONG Xiao-gang. APPLICATIONS AND ADVANCES FOR THE COSEISMIC DEFORMA-TION OBSERVATIONS, EARTHQUAKE EMERGENCY RESPONSE AND SEISMOGENIC STRUCTURE INVESTIGATION USING INSAR [J]. SEISMOLOGY AND GEOLOGY, 2023, 45(2): 570-592.
[3]	FAN Wen-jie. CHARACTERISTICS OF TECTONIC STRESS FIELD AROUND THE YANGBI M_S6.4 EARTHQUAKE AND ITS SURROUNDING AREAS ON MAY 21, 2021 AND ITS GEODYNAMIC IMPLICATION [J]. SEISMOLOGY AND GEOLOGY, 2023, 45(1): 208-230.
[4]	ZHANG Ke, WANG Xin, YANG Hong-ying, WANG Yue, XU Yan, LI Jing. THE CHARACTERISTICS AND SEISMOGENIC STRUCTURE ANALYSIS OF THE 2021 YANGBI M_S6.4 EARTHQUAKE SEQUENCE, YUNNAN [J]. SEISMOLOGY AND GEOLOGY, 2023, 45(1): 231-251.
[5]	LI Chuan-you, SUN Kai, MA Jun, LI Jun-jie, LIANG Ming-jian, FANG Li-hua. THE 2022 M6.8 LUDING EARTHQUAKE: A COMPLICATED EVENT BY FAULTING OF THE MOXI SEGMENT OF THE XIANSHUIHE FAULT ZONE [J]. SEISMOLOGY AND GEOLOGY, 2022, 44(6): 1648-1666.
[6]	ZHANG Bo-xuan, ZHENG Wen-jun, CHEN Jie, HE Xiao-hui, LI Qi-lei, ZHANG Dong-li, DUAN Lei, CHEN Gan. ANALYSIS OF THE SEISMOGENIC STRUCTURE OF THE JUNE 2021 M_S5.8 MANG’AI EARTHQUAKE IN NORTHERN QAIDAM BASIN [J]. SEISMOLOGY AND GEOLOGY, 2022, 44(5): 1313-1332.
[7]	DENG Wen-ze, LIU Jie, YANG Zhi-gao, SUN Li, ZHANG Xue-mei. PRELIMINARY ANALYSIS FOR RUPTURE PROCESS OF THE MAY 22TH, 2021, MADOI(QINGHAI) M_S7.4 EARTHQUAKE [J]. SEISMOLOGY AND GEOLOGY, 2022, 44(4): 1059-1070.
[8]	YAO Sheng-hai, GAI Hai-long, YIN Xiang, LIU Wei, ZHANG Jia-qing, YUAN Jian-xin. A DISCUSSION ON THE RELATIONSHIP BETWEEN THE SUR-FACE RUPTURE ZONE IN FRONT OF THE AMUNIKESHAN MOUNTAIN AND THE 1962 M6.8 EARTHQUAKE [J]. SEISMOLOGY AND GEOLOGY, 2022, 44(4): 976-991.
[9]	LI Zong-xu, HE Ri-zheng, JI Zhan-bo, LI Yu-lan, NIU Xiao. THE FOCAL MECHANISM AND TECTONIC SIGNIFICANCE OF THE M_S5.6 EARTHQUAKE ON JULY 24, 2009 IN NIMA, TIBET [J]. SEISMOLOGY AND GEOLOGY, 2022, 44(4): 992-1010.
[10]	WANG Xiao-shan, WAN Yong-ge. CHARACTERISTICS OF THE CRUSTAL STRESS FIELD AND ITS DIRECTION CONVERGENCE BEFORE THE WENCHUAN EARTHQUAKE [J]. SEISMOLOGY AND GEOLOGY, 2022, 44(2): 363-377.
[11]	WANG Liang, JIAO Ming-ruo, QIAN Rui, ZHANG Bo, YANG Shi-chao, SHAO Yuan-yuan. CRUSTAL VELOCITY STRUCTURE BENEATH THE SOUTHERN LIAONING PROVINCE DERIVED FROM DOUBLE DIFFERENCE TOMOGRAPHY [J]. SEISMOLOGY AND GEOLOGY, 2022, 44(2): 378-394.
[12]	YU Zhan-yang, SHEN Xu-zhang, LIANG Hao, ZHENG Wen-jun, LIU Xu-zhou. THE CHARACTERISTICS OF MAJOR FAULTS AND STRESS FIELD IN WEIHE-YUNCHENG BASIN CONSTRAINED BY SEISMIC ACTIVITY AND FOCAL MECHANISM SOLUTIONS [J]. SEISMOLOGY AND GEOLOGY, 2022, 44(2): 395-413.
[13]	ZHANG Zhi-wei, LONG Feng, ZHAO Xiao-yan, WANG Di. STUDY ON FOCAL MECHANISM SOLUTION AND STRESS FIELD CHARACTERISTICS IN SICHUAN AND YUNNAN AREA [J]. SEISMOLOGY AND GEOLOGY, 2022, 44(1): 170-187.
[14]	LI Cui-ping, TANG Mao-yun, GUO Wei-ying, WANG Xiao-long, DONG Lei. A PRELIMINARY STUDY ON 3D VELOCITY STRUCTURE OF RONGCHANG AND ITS ADJACENT AREA [J]. SEISMOLOGY AND EGOLOGY, 2022, 44(1): 205-219.
[15]	XU Fang, LU Ren-qi, WANG Shuai, JIANG Guo-yan, LONG Feng, WANG Xiao-shan, SU Peng, LIU Guan-shen. STUDY ON THE SEISMOTECTONICS OF THE QINGBAIJIANG M_S5.1 EARTHQUAKE IN SICHUAN PROVINCE IN 2020 BY MULTIPLE CONSTRAINT METHOD [J]. SEISMOLOGY AND EGOLOGY, 2022, 44(1): 220-237.