«上一篇/Previous Article|本期目录/Table of Contents|下一篇/Next Article»

《地震研究》[ISSN:1000-0666/CN:53-1062/P]

卷:

45

期数:

2022年04期

页码:

560-569

栏目:

出版日期:

2022-08-20

文章信息/Info

Title:

Possible Coulomb Stress Interactions between the Three Main Earthquakes in the 1989 Datong-Yanggao Earthquake Swarm

作者:

王霞¹; 宋美琴¹; 郭文峰¹; 陈慧¹; 方强²

(1.山西省地震局,山西 太原 030021; 2.信阳市生态环境局光山分局,河南 光山 465450)

Author(s):

WANG Xia¹; SONG Meiqin¹; GUO Wenfeng¹; CHEN Hui¹; FANG Qiang²

(1.Shanxi Earthquake Agency,Taiyuan 030021,Shanxi,China)(2.Guangshan Branch of the Xinyang Ecological Environment Bureau,Guangshan 465450,Henan,China)

关键词:

库仑应力;  应力触发;  有效摩擦系数;  大同—阳高震群

Keywords:

Coulomb stress;  stress triggering;  effective coefficient of friction;  the Datong-Yanggao earthquake swarm

分类号:

P315.24

DOI:

10.20015/j.cnki.ISSN1000-0666.2022.0053

摘要:

通过计算1989年大同—阳高震群序列中5.7、5.9、5.6级3次地震的同震静态库仑应力,分析不同断层参数对库仑破裂应力的影响,并结合震群序列的分布和扩展方式,定量研究3次地震之间的触发关系。结果显示:5.7级地震可能是NW向左旋走滑,之后5.9级地震发生右旋走滑,震群活动为一组共轭剪切破裂的结果,并触发了后续地震。综合分析3次地震的时空分布与库仑应力变化的关系,推测1989年大同—阳高震群可能的发震机制为:①在区域应力场增强的背景下,2条共轭的发震断层均接近破裂临界水平,屈服应力较低的NW向团堡断裂先发生破裂; ②随后触发NE向大王村断裂破裂,且以NE向破裂为主,这与区域应力场方向一致; ③研究区域接收断层的有效摩擦系数比较高,在0.4以上; ④ 5.9级地震的发生,触发了西南区域的地震序列,东南区域的地震序列可能受5.9级地震的影响,并受控于断层的摩擦系数。总体而言,这3次M>5.5地震之间存在着一定的触发关系,5.9级地震对周边断层有明显的触发作用。

Abstract:

We calculated the co-seismic static Coulomb stress changes of the M5.7 earthquake,the M5.9 earthquake and the M5.6 earthquake in the 1989 Datong-Yanggao earthquake swarm,and analyzed the effects of different fault parameters on the Coulomb stress field,and quantitatively investigated the triggering relationships among these earthquakes by combining the distribution patterns of the aftershock sequences.The results show that the M5.7 shock may have been characterized by NW left-lateral strike-slip,followed by NE right-lateral strike-slip of the M5.9 shock,with conjugate activity of the seismogenic fault,and triggered the subsequent aftershocks.A comprehensive analysis of the distribution of events and the Coulomb stress changes suggests that the possible seismogenic mechanisms of the 1989 Datong-Yanggao earthquake swarm are:①In the context of the enhanced regional stress field,the 2 conjugate seismogenic faults were both close to the critical state of failure,and the NW-oriented Tuanbao fault ruptured firstly with lower yield stress; ②The NE-oriented Dawangcun fault was subsequently triggered rupture,and the NE-oriented rupture was predominant.The main aftershocks were distributed in NE direction,which was consistent with the direction of the NE principle compressive stress; ③The effective friction coefficients of the receiving faults in the study area were relatively high(over 0.4); ④The M5.9 earthquake triggered the aftershocks in the southwest region,and the aftershocks in the southeast region may be influenced by the M5.9 earthquake,and was controlled by the friction coefficient of the fault.Generally,there was a trigger relationship between the three M>5.5 earthquakes,and the M5.9 shock had a significant triggering effect on the surrounding faults.

参考文献/References:

啜永清,刘巍,彭美煊.1999.大同—阳高地震的余震与华北北部较大地震的关系[J].地震,19(4):379-386.
啜永清.1995.大同—阳高地震的余震窗口[J].山西地震,(1):20-24.
啜永清.1999.大同—阳高地震的余震窗口特征及机理分析[J].山西地震,(3):25-30.
大同—阳高地震烈度宏观考察组.1991.1989年大同—阳高6.1级地震烈度宏观考察[J].山西地震,(3):18-30.
冯永革,王海洋,陈永顺,等.2016.1989—1999大同地震序列的隐伏断层研究:库仑应力分析和余震JHD重定位[J].地球物理学报,59(2):568-577.
黄禄渊,程惠红,张怀,等.2019.2008年汶川地震同震-震后应力演化及其对2017年九寨沟M_S7.0地震的影响[J].地球物理学报,62(4):1268-1281.
贾若,蒋海昆.2014.基于同震库仑应力变化的汶川地震余震频次研究[J].中国地震,30(1):74-90.
靳玉科,梁向军,靳玉贞,等.2010.大同震区地震序列震源位置及震源区速度结构初探[J].山西地震,(3):1-6.
靳志同,万永革,刘兆才,等.2019.2017年九寨沟M_S7.0地震对周围地区的静态应力影响[J].地球物理学报,62(4):1282-1299.
刘瑞丰,李鸿吉,陈培善,等.1995.大同地震序列的震源机制解[J].地震地磁观测与研究,16(2):30-36.
龙锋,闻学泽,徐锡伟.2006.华北地区地震活断层的震级—破裂长度、破裂面积的经验关系[J].地震地质,28(4):511-535.
单斌,熊熊,郑勇,等.2013.2013年芦山地震导致的周边断层应力变化及其与2008年汶川地震的关系[J].中国科学:地球科学,43(6):1002-1009.
山西省地震局.2004.山西大同—阳高地震[M].北京:地震出版社.
石富强,张辉,邵志刚,等.2020.华北地区库仑应力演化与强震活动关系[J].地球物理学报,63(9):3338-3354.
宋美琴,郑勇,葛粲,等.2012.山西地震带中小震精确位置及其显示的山西地震构造特征 [J].地球物理学报,55(2):513-525.
万永革,沈正康,盛书中,等.2009.2008年汶川大地震对周围断层的影响[J].地震学报,31(2):128-139.
万永革,沈正康,曾跃华,等.2008.唐山地震序列应力触发的黏弹性力学模型研究[J].地震学报,30(6):581-593.
万永革.2019.同一个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.
王霞,宋美琴,李宏伟,等.2017a.大同地震窗P波频散衰减的异常变化特征[J].地震工程学报,39(2):1-8.
王霞,宋美琴,李宏伟,等.2017b.同窗视应力时变特征浅析[J].地震地磁观测与研究,38(5):33-38.
王霞,宋美琴,郑勇,等.2019.山西及邻区壳幔速度图像特征及其构造意义[J].地震地质,41(1):119-136.
王霞,宋美琴.2017.大同窗地震活动的频次和应变能特征[J].中国地震,33(2):340-349.
王霞,宋美卿,陈慧,等.2021.山西大同—阳高M>5.5地震震源机制中心解的确定[J].山西地震,(3):1-4.
胥鸿睿.2018.鄂尔多斯块体东缘横波速度结构及各向异性研究[D].武汉:中国地质大学.
徐扬,田勇,啜永清,等.1997.大同—阳高6.1级震群震源区及其附近地区地壳三维P波速度结构反演[J].山西地震,(2):25-29.
张成科,张先康,盖玉杰,等.1998.大同—阳高震区及其邻区壳幔速度结构与深部构造[J].地震地质,20(4):391-398.
朱琳,李腾飞,石富强,等.2021.1976年唐山强震群震后库仑应力演化及其与2020年古冶5.1级地震的关系[J].地震研究,44(1):1-8.
Freed A M,Ali S T,Burgmann R.2007.Evolution of stressin Southern California for the past 200 years from coseismic,postseismic and interseismic stress changes[J].Geophys J Int,169:1164-1179.
Freed A M.2005.Earthquake triggering by static,dynamic,and postseismic stress transfer[J].Annual Review of Earth and Planetary Sciences,33(1):335-367.
Hill D P,Reasenberg P A,Michael A,et al.1993.Seismicity remotely triggered by the magnitude 7.3 Landers,California earthquake[J].Science,260(5114):1617-1623.
Jaeger J C,Cook N G W,Zimmerman R W.2009.Fundamentals of rock mechanics[M].Oxford:John Wiley & Sons,90.
Li B,Mathilde B S,Kuvvet A.2015.Coulomb stress evolution in the Shanxi rift system,North China,since 1303 associated with coseismic,post-seismic and interseismic deformation[J].Geophysical Journal International,203(3):1642-1664.
Lin J,Stein R S.2004.Stress triggering in thrust and subduction earthquakes and stress interaction between the southern San Andreas and nearby thrust and strike-slip faults[J].J Geophys Res,109(B2):B02303.
Lozos J C,Harris R A.2020.Dynamic rupture simulations of the M6.4 and M7.1 July 2019 Ridgecrest,California,earthquakes[J].Geophysical Research Letters,47(7):e2019GL086020.
Nalbant S S,Hubert A,King G C.1998.Stress coupling between earthquakes in northwest Turkey and the north Aegean Sea[J].J Geophys Res,103(B10):24469-24486.
Perfettini H,Avouac P.2007.Modeling afterslip and aftershocks following the 1992 Landers earthquake[J].J Geophys Res,112(B5):B07409.
Shan B,Xiong X,Wang R J,et al.2013a.Coulomb stress evolution along Xianshuihe–Xiaojiang Fault System since 1713 and its interaction with Wenchuan earthquake,May 12,2008[J].Earth and Planetary Science Letters,377-378(2013):199-210.
Shan B,Xiong X,Zheng Y,et al.2008.Stress changes on major faults caused by M_W7.9 Wenchuan earthquake,May 12[J].Sci China Ser D-Earth Sci,52(5):593-601.
Shan B,Xiong X,Zheng Y,et al.2011.The co-seismic Coulomb stress change and expected seismicity rate caused by 14 April 2010 M_S=7.1 Yushu,China,earthquake[J].Tectonophysics,510(3):345-353.
Shan B,Xiong X,Zheng Y,et al.2013b.Stress changes on major faults caused by 2013 Lushan earthquake,and its relationship with 2008 Wenchuan earthquake[J].Science China:Earth Sciences,56(7):1169-1176.
Stein R S,Barka A A,Dieterich J H.1997.Progressive failure on the North Anatolian fault since 1939 by earthquake stress triggering[J].Geophys J Int,128(3):594-604.
Toda S,Lin J,Meghraoui M,et al.2008.12 May 2008 M=7.9 Wenchuan,China,earthquake calculated to increase failure stress and seismicity rate on three major fault systems[J].Geophys Res Lett,35(17):L17305.
Toda S,Stein R S.2002.Response of the San Andreas fault to the 1983 Coalinga Nu?ez earthquakes:An application of interaction-based probabilities for Parkfield[J].J Geophys Res,107(136):ESE 6-1-ESE 6-16.
Wang R,Lorenzo-Martín F,Roth F.2006.PSGRN/PSCMP-a new code for calculating co-and postseismic deformation,geoid and gravity changes based on the Viscoelastic-Gravitational Dislocation Theory[J].Computers & Geosciences,32(4):527-541.
William D B,Gavin P H,Ryan D G.2019.The July 2019 Ridgecrest,California Earthquake Sequence:Kinematics of Slip and Stressing in Cross-Fault Ruptures[J].Geophysical Research Letters,46(21):11859-11867.
Zachary E R,Benjamn I,Zhe J,et al.2019.Hierarchical interlocked orthogonal faulting in the 2019 Ridgecrest earthquake sequence[J].Science,366(6463):346-351.
Zhuo Y Q,Guo Y S,Bornyakov A S,et al.2019.A test of the oblique-rifting model for transfer zone deformation in the northern Fen-Wei rift:implications from the 1989 M6.1 Datong-Yanggao earthquake swarm[J].Geodynamics and tectonophysics,10(1):43-51.

备注/Memo

备注/Memo:

收稿日期:2022-01-18
基金项目:中国地震局地震科技星火计划(XH200403Y)、山西省科技厅面上青年基金(201901D211548)、中国地震局地质所国家野外站研究课题(NORSTY2021-01)、山西省科技攻关项目(20140313023-1)、山西省应用基础研究计划(201801D121030)和国家自然科学基金(41874053,42030108)联合资助.

常用功能

更新日期/Last Update: 2022-08-01