research of source parameters and stress state in shandong segment of tanlu fault zone

doi:10.3969/j.issn.0253-4967.2015.04.003

Abstract

Abstract:

In recent years, there have been few researches and analysis published on the seismic activity and stress state in Shandong segment of Tanlu fault zone using digital seismological methods such as seismic apparent stress, focal mechanism solution and so on. In this paper, source parameters such as focal mechanism solutions and apparent stress are calculated using the waveform data of M_L≥1 moderate-small earthquakes in Shandong segment of Tanlu fault zone recorded by Shandong digital seismic network since 2007. According to focal mechanism solutions, a statistical analysis is done on the focal dislocation types in the study area using triangle graphical method, and the results show that the faulting in this area is mainly of strike-slip mechanism, and there are less thrust and normal mechanism. Calculation with the mean stress tensor method illustrates that the direction of mean principle stress of Shandong segment of Tanlu fault zone is NEE-SWW, which is the result of the combined effect of the subduction of West Pacific plate and the extrusion of Indian plate to Eurasian plate; the small dip angle indicates that the mode of action of stress is nearly horizontal, and the direction of principal stress axis is nearly perpendicular to the Tanlu fault zone. Under the action of such compressive stress field, dislocation is not likely to occur and the stress accumulation is enhanced on both sides of the fault. The apparent stress is calculated using the source spectral parameters method. Apparent stress has positive correlation with the magnitude and increases with the increased magnitude. So we get apparent stress difference by subtracting the empirical fitting value from the apparent stress. By removing the impact of magnitude, and according to the temporal-spatial evolution image of apparent stress difference, we found that the apparent stress in Shandong segment of Tanlu fault zone generally has a trend of decrease starting from the Wenchuan earthquake in 2008, and the spatial distribution of apparent stress in the region is very uneven. Combined with the spatial distribution of b values, the result shows that high stress is mainly located in Anqiu segment and Tancheng-Juxian segment, especially in Anqiu segment where small magnitude earthquakes appeared accompanying with the high stress. Low b-value means high stress and low frequency means low stress release, which indicates that Anqiu segment might accumulate higher stress and is at the fault locking stage. The research will provide new data for better understanding the present active feature and stress state of the Shandong segment of the Tanlu fault zone.

Key words: focal mechanism solutions, apparent stress, triangle graphical method, average stress tensor, Shandong segment of Tanlu fault zone, stress state

摘要：

利用山东数字地震台网记录到的2007—2014年的郯庐断裂带山东段M_L≥1.0小震的震源机制解和视应力值, 借助三角形图解法和平均力轴张量法, 并结合b值等参数, 综合分析了该区近年的应力状态。研究结果表明: 郯庐断裂带山东段的主应力场方向为NEE-SWW向, 是受西太平洋板块的俯冲作用和印度板块与欧亚板块挤压作用的共同影响的结果; 震源错动类型以走滑型为主, 逆冲型和正断型次之; 通过视应力的时空演化图像看到郯庐断裂带山东段视应力值从2008年汶川地震之后呈现总体减弱的趋势, 而空间上视应力分布很不均匀, 高应力主要集中在安丘段和郯城—莒县段, 尤其是安丘段出现了小震级高视应力的情况, 同时安丘段的b值也显示同样的高应力, 低b值反映高应力, 低频度反映低应力释放, 表明安丘段可能正在积累较高的应力, 处于断层闭锁阶段。

关键词: 震源机制解, 视应力, 三角形图解法, 力轴张量法, 郯庐断裂带山东段, 应力状态

CLC Number:

P315.2

WANG Peng, ZHENG Jian-chang, LIU Xi-qiang, XU Chang-peng, LI Xia. research of source parameters and stress state in shandong segment of tanlu fault zone[J]. SEISMOLOGY AND GEOLOGY, 2015, 37(4): 966-981.

王鹏, 郑建常, 刘希强, 徐长朋, 李霞. 郯庐断裂带山东段震源参数及应力状态[J]. 地震地质, 2015, 37(4): 966-981.

References

晁洪太, 李家灵, 崔昭文, 等. 1994a. 郯庐断裂带中段全新世活断层的几何结构与分段［A］. 见: 国家地震局地质研究所编. 活动断裂研究(3). 北京: 地震出版社. 180—190.
CHAO Hong-tai, LI Jia-ling, CUI Zhao-wen, et al. 1994a. Geometry and segmentation of the Quaternary fault in the middle segment of the Tanlu fault zone ［A］. In: Institute of Geology, State Seismological Bereau(ed). Research of Active Fault (3). Seismological Press, Beijing. 180—190(in Chinese).
晁洪太, 李家灵, 崔昭文, 等. 1994b. 郯庐断裂带中段全新世活断层的特征滑动行为与特征地震［J］. 内陆地震, 8(4): 297—304.
CHAO Hong-tai, LI Jia-ling, CUI Zhao-wen, et al. 1994b. Characteristic slip behavior of the Holocene fault in the central section of the Tanlu fault zone and the characteristic earthquakes ［J］. Inland Earthquake, 8(4): 297—304(in Chinese).
晁洪太, 李家灵, 崔昭文, 等. 1997. 郯庐断裂带潍坊—嘉山段全新世活断层的活动方式与发震模式［J］. 地震研究, 20(2): 218—225.
CHAO Hong-tai, LI Jia-ling, CUI Zhao-wen, et al. 1997. Mode of motion of the Holocene fault in Weifang-Jiashan segment of the Tanlu fault zone and earthquake-generating model ［J］. Journal of Seismological Research, 20(2): 218—225(in Chinese).
晁洪太, 王志才, 刘西林. 1999. 郯庐断裂带下辽河—莱州湾段与潍坊—嘉山段地震构造和地震活动特征对比［J］. 华北地震科学, l7(2): 36—42.
CHAO Hong-tai, WANG Zhi-cai, LIU Xi-lin. 1999. Comparison of seismotectonics and seismicities between the Xialiaohe-Laizhouwan segment and the Weifang-Jiashan segment of the Tancheng-Lujiang fault zone ［J］. North China Earthquake Sciences, l7(2): 36—42(in Chinese).
程万正, 阮祥, 张永久. 2006. 川滇次级地块震源机制解类型与一致性参数［J］. 地震学报, 28(5): 561—573.
CHENG Wan-zheng, RUAN Xiang, ZHANG Yong-jiu. 2006. Types of focal mechanism solutions and parameter consistency of the sub-blocks in Sichuan and Yunnan Provinces ［J］. Acta Seismologica Sinica, 28(5): 561—573(in Chinese).
邓起东, 冉勇康, 杨晓平, 等. 2007. 中国活动构造图［Z］. 北京: 地震出版社.
DENG Qi-dong, RAN Yong-kang, YANG Xiao-ping, et al. 2007. Acitive Tectonics Map of China ［Z］. Seismological Press, Beijing (in Chinese).
丁国瑜. 1989. 第四纪断层上断裂活动的群集及迁移现象［J］. 第四纪研究, 1: 36—47.
DING Guo-yu. 1989. Grouping and migration of faulting on Quaternary faults ［J］. Quaternary Sciences, 1: 36—47(in Chinese).
方仲景, 计凤桔, 向宏发, 等. 1976. 郯庐带中段第四纪断裂活动特征与地震地质条件述评［J］. 地质科学, (4): 354—365.
FANG Zhong-jing, JI Feng-ju, XIANG Hong-fa, et al. 1976. Reviews on the Quaternary fault activities and seismological situation in the middle segment of the Tanlu fault zone ［J］. Chinese Journal of Geology, (4): 354—365(in Chinese).
高维明, 李家灵, 孙竹友. 1980. 沂沭大陆裂谷的生成与演化［J］. 地震地质, 2(3): 11—18.
GAO Wei-ming, LI Jia-ling, SUN Zhu-you. 1980. Development and evolution of the Yishu rift ［J］. Seismology and Geology, 2(3): 11—18(in Chinese).
高维明, 郑郎荪, 李家灵, 等. 1988. 1668年山东郯城8.5级地震的发震构造［J］. 中国地震, 4(3): 9—15.
GAO Wei-ming, ZHENG Lang-sun, LI Jia-ling, et al. 1988. Seismogenic structure of the 1668 M8.5 Tancheng earthquake in Shandong ［J］. Earthquake Research in China, 4(3): 9—15(in Chinese).
葛荣峰, 张庆龙, 解国爱. 2009. 郯庐断裂带北段及邻区现代地震活动性与应力状态［J］, 31(1): 141—155.
GE Rong-feng, ZHANG Qing-long, XIE Guo-ai. 2009. Seismic activity and stress state of the northern Tanlu fault zone and its adjacent areas ［J］. Seismology and Geology, 31(1): 141—155(in Chinese).
国家地震局地质研究所. 1987. 郯庐断裂带［M］. 北京: 地震出版社.
Institute of Geology, State Seismological Bureau. 1987. The Tanlu Fault Zone ［M］. Seismological Press, Beijing(in Chinese).
何宏林, 宋方敏, 李传友, 等. 2004. 郯庐断裂带莒县胡家孟晏地震破裂带的发现［J］. 地震地质, 26(4): 630—637.
HE Hong-lin, SONG Fang-min, LI Chuan-you, et al. 2004. Hujiamengyan surface rupture in Juxian County, Shandong Province-A new discovery on the Tanlu fault zone ［J］. Seismology and Geology, 26(4): 630—637(in Chinese).
鞠林雪, 朱光, 王浩乾. 2012. 1668年郯城 8 1/2 级地震构造应力场分析［J］. 地质科学, 47(3): 836—850.
JU Lin-xue, ZHU Guang, WANG Hao-qian. 2012. Seismic tectonic stress field analysis of the 1668 M8 1/2 Tancheng earthquake ［J］. Chinese Journal of Geology, 47(3): 836—850(in Chinese).
李发, 戈宁, 王行舟. 2012. 郯庐断裂带南段及邻区中小地震视应力的时空特征研究［J］. 地震, 32(4): 53—61.
LI Fa, GE Ning, WANG Xing-zhou. 2012. Temporal and spatial characteristics of small to moderate earthquake apparent stresses in the south part of Tanlu fault belt and adjacent areas ［J］. Earthquake, 32(4): 53—61(in Chinese).
李家灵, 晁洪太, 崔昭文, 等. 1994. 1668年郯城8 级地震断层及其破裂机制［J］. 地震地质, 16(3): 230—237.
LI Jia-ling, CHAO Hong-tai, CUI Zhao-wen, et al. 1994. Earthquake fault and its rupture mechanism of the 1668 Tancheng earthquake of M8 ［J］. Seismology and Geology, 16(3): 230—237(in Chinese).
李艳娥, 陈学忠, 付虹. 2012a. 2007年云南泞洱M_S6.4地震前滇西南地区震源动力学参数时空变化特征［J］. 地震, 32(1): 28—39.
LI Yan-e, CHEN Xue-zhong, FU Hong. 2012a. Temporal and spatial variation of focal dynamic parameters in southwest Yunnan before the 2007 M_S6.4 Ning'er earthquake ［J］. Earthquake, 32(1): 28—39(in Chinese).
李艳娥, 陈学忠, 王恒信. 2012b. 汶川8.0级地震前四川地区地震视应力时空变化特征［J］. 地震, 32(4): 113—122.
LI Yan-e, CHEN Xue-zhong, WANG Heng-xin. 2012b. Temporal and spatial variation of apparent stress in Sichuan area before the M_S8.0 Wenchuan earthquake ［J］. Earthquake, 32(4): 113—122(in Chinese).
刘东旺, 夏瑞良, 刘泽民, 等. 2006. 郯庐断裂带安徽段现代地震活动及应力场特征［J］. 地质科学, 42(2): 278—290.
LIU Dong-wang, XIA Rui-liang, LIU Ze-min, et al. 2006. Characteristics of recent seismicity and stress fields in Anhui sector of the Tanlu fault zone ［J］. Chinese Journal of Geology, 42(2): 278—290(in Chinese).
刘杰, 郑斯华, 康英, 等. 2004. 利用P波和S波的初动和振幅比计算中小地震的震源机制解［J］. 地震, 24(1): 19—26.
LIU Jie, ZHENG Si-hua, KANG Ying, et al. 2004. The focal mechanism determinations of moderate-small earthquakes using the first motion and amplitude ratio of P and S wave ［J］. Earthquake, 24(1): 19—26(in Chinese).
刘泽民, 刘东旺, 李玲利, 等. 2011. 利用多个震源机制解求东大别地区平均应力场［J］. 地震学报, 33(5): 605—613.
LIU Ze-min, LIU Dong-wang, LI Ling-li, et al. 2011. Determination of mean stress field in eastern Dabie region from focal mechanism solution analysis ［J］. Acta Seismologica Sinica, 33(5): 605—613(in Chinese).
马文涛, 徐锡伟, 徐平, 等. 2004. 地震三角形分类图解法与华北地区地震成因分析［J］. 地球物理学进展, 19(2): 379—385.
MA Wen-tao, XU Xi-wei, XU Ping, et al. 2004. The method of triangle seismic classify and analysis on the seismic cause in the northern China ［J］. Progress in Geophysics, 19(2): 379—385(in Chinese).
满洪敏. 2005. 沂沭断裂带内部的差异活动及其成因分析［J］. 华北地震科学, 23(3): 13—21.
MAN Hong-min. 2005. Differential activity within Yishu fault zone and its causes of formation ［J］. North China Earthquake Sciences, 23(3): 13—21(in Chinese).
倪红玉, 刘泽民, 何康. 2013. 郯庐断裂带安徽段中小地震震源机制及现代应力场特征［J］. 地震工程学报, 35(3): 677—683.
NI Hong-yu, LIU Ze-min, HE Kang. 2013. Study on focal mechanisms of moderate-small earthquakes and characteristics of recent tectonic stress field in the Anhui sector of Tanlu fault zone ［J］. China Earthquake Engineering Journal, 35(3): 677—683(in Chinese).
乔慧珍, 程万正, 陈学忠. 2006. 安宁河-则木河断裂带地震视应力研究［J］. 地震研究, 29(2): 125—130.
QIAO Hui-zhen, CHENG Wan-zheng, CHEN Xue-zhong. 2006. Study on the apparent stress of the earthquakes on Anninghe-Zemuhe Fault ［J］. J Seism Res, 29(2): 125—130(in Chinese).
施炜, 张岳桥, 董树文. 2003. 郯庐断裂带中段第四纪活动及其分段特征［J］. 地球学报, 24(1): 11—18.
SHI Wei, ZHANG Yue-qiao, DONG Shu-wen. 2003. Quaternary activity and segmentation behavior of the middle portion of the Tanlu fault zone ［J］. Acta Geoscientia Sinica, 24(1): 11—18(in Chinese).
宋方敏, 杨晓平, 何宏林, 等. 2005. 山东安丘-莒县断裂小店子—茅埠段新活动及其定量研究［J］. 地震地质, 27(2): 200—211.
SONG Fang-min, YANG Xiao-ping, HE Hong-lin, et al. 2005. Quantitative analysis of recent activity of the Xiaodianzi-Maobu segment of the Anqiu-Juxian Fault, Shandong Province ［J］. Seismology and Geology, 27(2): 200—211(in Chinese).
宋国奇. 2007. 郯庐断裂带渤海段的深部结构与动力学意义［J］. 合肥工业大学学报(自然科学版), 30(6): 663—667.
SONG Guo-qi. 2007. Deep structures of the Bohai part of the Tanlu fault zone and their dynamic implications ［J］. Journal of Hefei University of Technology, 30(6): 663—667(in Chinese).
王鹏, 郑建常. 2014. 鲁东地区视应力时空变化特征分析［J］. 地震, 34(4): 70—77.
WANG Peng, ZHENG Jian-chang. 2014. Temporal and spatial variation of apparent stress in eastern Shandong Province ［J］. Earthquake, 34(4): 70—77(in Chinese).
王鹏, 郑建常, 赵金花. 2013. 胶东半岛地区震源波谱参数研究［J］. 地震工程学报, 35(2): 360—365.
WANG Peng, ZHENG Jian-chang, ZHAO Jin-hua. 2013. Status of seismic source spectral parameters in the Jiaodong Peninsula ［J］. China Earthquake Engineering Journal, 35(2): 360—365(in Chinese).
王琼, 陈学忠, 王琳瑛. 2005. 岫岩地震序列视应力变化及其预测意义［J］. 地震, 25(2): 91—97.
WANG Qiong, CHEN Xue-zhong, WANG Lin-ying. 2005. Change of apparent stress of Xiuyan earthquake sequence and its prediction significance ［J］. Earthquake, 25(2): 91—97(in Chinese).
王志才, 贾荣光, 孙昭民, 等. 2005. 沂沭断裂带安丘-莒县断裂安丘—朱里段几何结构与活动特征［J］. 地震地质, 27(2): 212—220.
WANG Zhi-cai, JIA Rong-guang, SUN Zhao-min, et al. 2005. Geometry and activity of the Anqiu-Zhuli segment of the Anqiu-Juxian Fault in the Yishu fault zone ［J］. Seismology and Geology, 27(2): 212—220(in Chinese).
王志才, 王冬雷, 许洪泰. 2015. 安丘-莒县断裂北段几何结构与最新活动特征［J］. 地震地质, 37(1): 176—191. doi: 10.3969/j.issn.0253-4967.2015.01.014.
WANG Zhi-cai, WANG Dong-lei, XU Hong-tai. 2015. Geometric features and latest activities of the north segment of the Anqiu-Juxian Fault ［J］. Seismology and Geology, 37(1): 176—191(in Chinese).
魏光兴, 周翠英, 胡政, 等. 1988. 沂沭断裂带现代构造应力场和震源错动性质［J］. 中国地震, 4(3): 96—101.
WEI Guang-xing, ZHOU Cui-ying, HU Zheng, et al., 1988. The tectonic stress field of Yishu fault zone and the nature of focal dislocation ［J］. Earthquake Research in China, 4(3): 96—101(in Chinese).
吴忠良, 黄静, 林碧苍. 2002. 中国西部地震视应力的空间分布［J］. 地震学报, 24(3): 293—301.
WU Zhong-liang, HUANG Jing, LIN Bi-cang. 2002. Distribution of apparent stress in western China ［J］. Acta Seismoiogica Sinica, 24(3): 293—301(in Chinese).
许忠淮, 阎明, 赵仲和. 1983. 由多个小地震推断的华北地区构造应力场的方向［J］. 地震学报, 5(3): 268—278.
XU Zhong-huai, YAN Ming, ZHAO Zhong-he. 1983. Evalution of the direction of tectonic stress in North China from recorded data of a large number of small earthquakes ［J］. Acta Seismologica Sinica, 5(3): 268—278(in Chinese).
严乐佳. 2013. 郯庐断裂带山东段新构造活动特征与动力学机制［D］: ［学位论文］. 合肥: 合肥工业大学.
YAN Le-jia. 2013. Neotectonic active characteristics and dynamic mechanism of the Shandong segment of the Tanlu fault zone ［D］. Dissertation. Hefei University of Technology, Hefei(in Chinese).
杨晓平, 宋方敏, 张兰凤, 等. 2006. 郯庐断裂带青峰岭断层上最新一次古地震事件［J］. 地震学报, 28(2): 213—218.
YANG Xiao-ping, SONG Fang-min, ZHANG Lan-feng, et al. 2006. A recent paleo-earthquake on Qingfengling seismic fault of Tanlu fault zone ［J］. Acta Seismologica Sinica, 28(2): 213—218(in Chinese).
易桂喜, 闻学泽, 辛华, 等. 2013. 龙门山断裂带南段应力状态与强震危险性研究［J］. 地球物理学报, 56(4): 1112—1120.
YI Gui-xi, WEN Xue-ze, XIN Hua. et al. 2013. Stress state and major-earthquake risk on the southern segment of the Longmen Shan fault zone ［J］. Chinese Journal of Geophysics, 56(4): 1112—1120(in Chinese).
于湘伟, 张怀, 陈运泰. 2010. 华北地区地震重新定位结果分析［J］. 大地测量与地球动力学, 30(2): 29—33.
YU Xiang-wei, ZHANG Huai, CHEN Yun-ta. 2010. Analysis of relocated earthquakes in North China region ［J］. Journal of Geodesy and Geodynamics, 30(2): 29—33(in Chinese).
张国民, 汪素云, 李丽, 等. 2002. 中国大陆地震震源深度及其构造含义［J］. 科学通报, 47(9): 663—668.
ZHANG Guo-min, WANG Su-yun, LI Li, et al. 2002. Focal depth of earthquakes in China mainland and its structural implication ［J］. Chinese Science Bulletin, 47(9): 663—668(in Chinese).
张鹏, 秦向辉, 丰成君. 2013. 郯庐断裂带山东段深孔地应力测量及其现今活动性分析［J］. 岩土力学, 34(8): 2329—2336.
ZHANG Peng, QIN Xiang-hui, FENG Cheng-jun. 2013. In situ stress measurement of deep borehole in Shandong segment of Tanlu fault belt and analysis of its activity ［J］. Rock and Soil Mechanics, 34(8): 2329—2336(in Chinese).
钟继茂, 程万正. 2006. 由多个地震震源机制解求川滇地区平均应力场［J］. 地震学报, 28(4): 337—346.
ZHONG Ji-mao, CHENG Wan-zheng. 2006. Determination of directions of the mean stress field in Sichuan-Yunnan region from a number of focal mechanism solutions ［J］. Acta Seismologica Sinica, 28(4): 337—346(in Chinese).
周翠英, 魏光兴. 1987. 沂沭断裂带现代构造应力场与地震活动［J］. 华北地震科学, 5(2): 29—39.
ZHOU Cui-ying, WEI Guang-xing. 1987. Recent tectonic stress field and seismicity in Yihe-Shuhe fault belt ［J］. North China Earthquake Sciences, 5(2): 29—39(in Chinese).
朱光, 宋传中, 牛漫兰, 等. 2002. 郯庐断裂带的岩石圈结构及其成因分析［J］. 高校地质学报, 8(3): 248—256.
ZHU Guang, SONG Chuan-zhong, NIU Man-lan, et al. 2002. Lithospheric textures of the Tanlu fault zone and their genetic analysis ［J］. Geological Journal of China Universities, 8(3): 248—256.
朱书俊, 孙寿成. 1991. 1668年莒县-郯城大震研究综述［J］. 地震学刊, (4): 19—24.
ZHU Shu-jun, SUN Shou-cheng. 1991. Reviews on researches on 1668 Juxian-Tancheng great earthquake ［J］. Journal of Seismology, (4): 19—24(in Chinese).
Apperson K D, Frohlich C. 1988. Sums of moment tensors for earthquakes near subduction zones ［J］. EOS Trans Am Geophys Union, 69: 1438.
Brune J N. 1970. Tectonic stress and the spectra of seismic shear waves from earthquakes ［J］. J Geophys Res, 75: 4997—5009.
Frohlich C. 1992. Triangle diagrams: Ternary graphs to display similarity and diversity of earthquake focal mechanisms ［J］. Physics of the Earth and Planetary Interiors, 75: 193—198.
Lei J. 2012. Upper-mantle tomography and dynamics beneath the North China Craton ［J］. J Geophys Res, 117:B06313. doi: 10.1029/2012JB009212.
Maruyama S, Isozaki Y, Kimura G, et al. 1997. Paleogeographic maps of the Japanese Islands: Plate tectonic synthesis from 750Ma to the present ［J］. Isl Arc, 6: 121—142.
Michalek J, Fischer T. 2013. Source parameters of the swarm earthquakes in West Bohemia/Vogtland ［J］. Geophys J Int, 195(2): 1196—1210.
Molnar P, Tapponnier P. 1975. Cenozoic tectonics of Asia: Effects of a continental collision ［J］. Sci, 189: 419—426.
Zhu X Y. 2014. An inversion of Lg wave attenuation and site response from seismic spectral ratios in the eastern China region ［J］. Bulletin of the Seismological Society of America, 104(3): 1389—1399.

[1]	JIANG Hai-kun, DENG Shi-guang, YAO Qi, SONG Jin, WANG Jin-hong. INTEGRATED INTERPRETATION ON THE PRECURSORY PROCESS EVOLUTION IN THE META-INSTABILITY STAGE OF THE EARTHQUAKE: A CASE STUDY ON 2014 LUDIAN M_S6.5 EARTHQUAKE [J]. SEISMOLOGY AND GEOLOGY, 2024, 46(3): 513-535.
[2]	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.
[3]	ZANG Yang, YU Yan-xiang, MENG Ling-yuan, HAN Yan-yan. STUDY ON ATTENUATION CHARACTERISTICS OF SEISMIC WAVES AND SEISMIC SOURCE PARAMETERS IN THE NORTH-EAST MARGIN OF QINGHAI-TIBET PLATEAU [J]. SEISMOLOGY AND EGOLOGY, 2021, 43(6): 1638-1656.
[4]	ZHAO Tao, WANG Ying, MA Ji, SHAO Ruo-tong, XU Yi-fei, HU Jing. RELOCATION AND FOCAL MECHANISM SOLUTIONS OF THE 2021 MADUO, QINGHAI M_S7.4 EARTHQUAKE SEQUENCE [J]. SEISMOLOGY AND EGOLOGY, 2021, 43(4): 790-805.
[5]	WANG Ying, ZHAO Tao, HU Jing, LIU Chun. RELOCATION AND FOCAL MECHANISM SOLUTIONS OF THE 2021 YANGBI, YUNNAN M_S6.4 EARTHQUAKE SEQUENCE [J]. SEISMOLOGY AND EGOLOGY, 2021, 43(4): 847-863.
[6]	DAI Miao, WU Gui-ju, LIU Jian, SHEN Chong-yang, SHEN Xue-lin, SHEN Xue-lin, WEI Gui-chun. APPARENT STRESS VARIATION CHARACTERISTICS BEFORE AND AFTER BADONG EARTHQUAKE IN THE THREE GORGES RESERVOIR AREA [J]. SEISMOLOGY AND GEOLOGY, 2017, 39(4): 837-852.
[7]	YI Gui-xi, LONG Feng, ZHAO Min, GONG Yue, ZHANG Zhi-wei, QIAO Hui-zhen. FOCAL MECHANISM AND SEISMOGENIC STRUCTURE OF THE M5.0 YUEXI EARTHQUAKE ON 1 OCT. 2014, SOUTHWESTERN CHINA [J]. SEISMOLOGY AND GEOLOGY, 2016, 38(4): 1124-1136.
[8]	JIANG ying, LIU Zi-wei, LI Hui, ZHANG Xiao-tong, WEI-Jin, SHEN Chong-yang. CONSTRAINING THE FOCAL MECHANISM OF THE 2015 NEPAL EARTHQUAKE WITH OBSERVATIONS OF THE CONTINUOUS GRAVITY STATIONS [J]. SEISMOLOGY AND GEOLOGY, 2016, 38(3): 660-669.
[9]	HAN Xiao-ming, LIU Fang, ZHANG Wen-tao, LI Juan, HOU Di. analyzing the variation characteristics of stress field in hetao seismic belt using focal mechanism data [J]. SEISMOLOGY AND GEOLOGY, 2015, 37(4): 1030-1042.
[10]	ZHANG Zhi-wei, ZHOU Long-quan, LONG Feng, RUAN Xiang. SPATIAL AND TEMPORAL CHARACTERISTIC OF STRESS FIELD FOR WENCHUAN M_S8.0 AND LUSHAN M_S7.0 EARTHQUAKE SEQUENCE [J]. SEISMOLOGY AND GEOLOGY, 2015, 37(3): 804-817.
[11]	MA Jin, GUO Yan-shuang. ACCELERATED SYNERGISM PRIOR TO FAULT INSTABILITY：EVIDENCE FROM LABORATORY EXPERIMENTS AND AN EARTHQUAKE CASE [J]. SEISMOLOGY AND GEOLOGY, 2014, 36(3): 547-561.
[12]	BU Yu-fei, WAN Yong-ge, ZHANG Yuan-sheng. TECTONIC STRESS ANALYSIS IN GANSU AND ITS ADJACENT AREAS [J]. SEISMOLOGY AND GEOLOGY, 2013, 35(4): 833-841.
[13]	WANG Kai-ying, MA Jin, DIAO Gui-ling, Yu. Rebetsky, WANG Xiao-shan, YAN Xiao-bin. STRESS CHANGE OF SHANXI TECTONIC BELT RELATED TO THE 2001 M_S 8.1 KUNLUN EARTHQUAKE [J]. SEISMOLOGY AND GEOLOGY, 2012, (4): 597-605.
[14]	WANG Kai-ying, Yu. Rebetsky, DIAO Gui-ling, MA Sheng-li, MA Jin. STRESS STATE OF WENCHUAN AREA BEFORETHE 2008 STRONG EARTHQUAKE [J]. SEISMOLOGY AND GEOLOGY, 2012, 34(1): 11-16.
[15]	HUA Wei, CHEN Zhang-li, ZHENG Si-hua, YAN Chun-Qing. A STUDY ON CHARACTERISTICS OF SOURCE PARAMETERS IN THREE GORGES RESERVOIR AREA [J]. SEISMOLOGY AND GEOLOGY, 2010, 32(4): 533-542.