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[1]DAI Yinglei,WAN Yongge,KONG Xiangxue,et al.Central Focal Mechanism of the Dengta,Liaoning M5.1 Earthquake in 2013 and the Analysis of Its Surrounding Tectonic Stress Field[J].Journal of Seismological Research,2022,45(04):570-580.[doi:10.20015/j.cnki.ISSN1000-0666.2022.0057]

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Central Focal Mechanism of the Dengta,Liaoning M5.1 Earthquake in 2013 and the Analysis of Its Surrounding Tectonic Stress Field

Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume: 45 Number of periods: 2022 04 Page number: 570-580 Column: Public date: 2022-08-20

Title:: Central Focal Mechanism of the Dengta,Liaoning M5.1 Earthquake in 2013 and the Analysis of Its Surrounding Tectonic Stress Field

Author(s):: DAI Yinglei¹; WAN Yongge²; 3; KONG Xiangxue¹; WANG Chengwei¹; SUO Rui¹; (1.Liaoning Earthquake Agency,Shenyang 110034,Liaoning,China)(2.Institute of Disaster Prevention,Sanhe 065201,Hebei,China)(3.Hebei Key Laboratory of Earthquake Dynamics,Sanhe 065201,Hebei,China)

Keywords:: the Dengta M5.1 earthquake; central focal mechanism solution; tectonic stress field; shear stress; Liaoning region

CLC:: P315.7

DOI:: 10.20015/j.cnki.ISSN1000-0666.2022.0057

Abstract:: In this paper,the focal mechanism solution of the Dengta,Liaoning M5.1 earthquake is calculated by the HASH method.The strike of one nodal plane is 12.85°,the dip angle is 89.42°,and the slip angle is 175.83°.Its central focal mechanism solution is determined in combination with other results.The strike of nodal planeⅠis 13.16°,the dip angle is 88.64°,and the slip angle is 171.01°; the strike of nodal plane Ⅱ is 103.38°,the dip angle is 81.01°,and the slip angle is 1.37°,which solve the problem of non-unique focal mechanism data selection for subsequent related studies.In order to further research the seismogenic background and occurrence conditions of this earthquake,128 focal mechanism solutions in Liaoning region over the past 10 years are collected.The tectonic stress field is inverted to simulate the various focal mechanisms and the distribution of relative shear stress,relative normal stress generated under its action.The results show that the Dengta M5.1 earthquake is a result from strike-slip tectonic stress system with NEE principal compressive stress axis and NNW stress axis in Liaoning.After a period of stress accumulation,the fracture occurs along the optimal nodal plane of the stress field in the area of maximum shear stress.

References:: 戴盈磊,万永革,梁永朵,等.2020.基于震源机制解资料的地区现今构造应力场[J].地震,40(3):112-130.
葛荣峰,张庆龙,解国爱,等.2009.郯庐断裂带北段及邻区现代地震活动性与应力状态[J].地震地质,31(1):141-154.
环文林,张晓东,宋昭仪.1997.中国大陆内部走滑型发震构造粘滑运动的结构特征[J].地震学报,19(3):225-234.
焦明若,王海燕,曹凤娟,等.2014.2013年1月23日辽阳灯塔5.1级地震异常分析[J].防灾减灾学报,30(1):1-6.
李彤霞,陈楠,吴建霆,等.2014.2013年1月23日辽宁灯塔5.1级地震浅析[J].防灾减灾学报,30(2):27-30.
林向东,袁怀玉,徐平,等.2017.华北地区地震震源机制分区特征[J].地球物理学报,60(12):4589-4622.
卢造勋,蒋秀琴,潘科,等.2002.中朝地台东北缘地区的地震层析成像[J].地球物理学报,45(3):338-351.
苏培臻,安祥宇,李恩来,等.2020.辽宁地区近期中小地震震源机制研究[J].地球物理学报,63(11):4023-4036.
孙素梅,马莉,许振峰,等.2018.辽宁灯塔M5.1地震序列重新定位研究[J].防灾减灾学报,34(3):42-48.
单家增,张占文,孙红军,等.2004.营口—佟二堡断裂带成因机制的构造物理模拟实验研究[J].石油勘探与开发,(1):15-17.
万波,靳超宇,索锐.2017.辽宁省及邻近地区主要地震构造及其危险性判定[J].防灾减灾学报,33(1):1-11.
万永革,盛书中,许雅儒,等.2011.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,54(4):994-1001.
万永革.2015.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,58(9):3144-3156.
万永革.2019.同一地震多个震源机制中心解的确定[J].地球物理学报,62(12):4718-4728.
万永革.2020.震源机制与应力体系关系模拟研究[J].地球物理学报,63(6):2281-2296.
王岩,张博,曹凤娟,等.2016.辽宁地区2008年以来M_L≥3.0地震震源机制解分析[J].防灾减灾学报,32(3):1-6.
谢弘臻,王九洋.2018.辽阳灯塔M_S5.1地震震源深度分析[J].中国地震,34(4):704-712.
许英才,曾宪伟,王银,等.2021.2020年6月9日中卫M_L3.4地震的震源机制及其中心解的测定[J].地震科学进展,51(6):258-265.
张萍,蒋秀琴.2000.辽宁地区震源机制解及应力场特征的研究[J].东北地震研究,16(1):1-7.
赵宏阳,陈晓非.2017.1975年海城M_S7.3地震强地面运动模拟[J].地球物理学报,60(7):2707-2715.
郑确.2018.辽宁地区地壳三维体波速度结构与典型区域地震危险性评估[D].长春:吉林大学,47-49.
中国地震局地震预测研究所.2013.2013年1月23日辽宁省灯塔市M_S5.1地震的震源机制解[EB/OL].(2013-01-25)[2022-02-20].https://www.ief.ac.cn/kydts/info/2013/14144.html.
Gephart J W,Forsyth D W.1984.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:Solid Earth,89(B11):3905-3920.
Hardebeck J L,Shearer P M.2002.A new method for determining first-motion focal mechanisms[J].Bulletin of the Seismological Society of Americ,92(6):2264-2276.
Hardebeck J L,Shearer P M.2003.Using S/P amplitude ratios to constrain the focal mechanisms of small earthquakes[J].Bulletin of the Seismological Society of America,93(6):2434-2444.
Wan Y G,Sheng S Z,Huang J C,et al.2016.The grid search algorithm of tectonic stress tensor based on focal mechanism data and its application in the boundary zone of China,Vietnam and Laos[J].Journal of Earth Science,27(5):777-785.
Wan Y G.2010.Contemporary tectonic stress field in China[J].Earthquake Science,23(4):377-386.
Zoback M L.1992.First-and second-order patterns of stress in the lithosphere:the world stress map project[J].Journal of Geophysical Research Solid Earth,97(B8):11703-11728.

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Last Update: 2022-08-01