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《地震研究》[ISSN:1000-0666/CN:53-1062/P]

卷:

期数:

2025年02期

页码:

334-340

栏目:

出版日期:

2025-02-10

文章信息/Info

Title:

Analysis of Seismic Source Parameters of the Pingyuan, Shandong M_S5.5 Earthquake on August 6,2023

作者:

李翠芹; 郑建常; 张正帅; 戴宗辉

(山东省地震局,山东 济南 250100)

Author(s):

LI Cuiqin; ZHENG Jianchang; ZHANG Zhengshuai; DAI Zonghui

(Shandong Earthquake Agency,Jinan 250014,Shandong,China)

关键词:

平原M_S5.5地震;  视应力;  震源参数;  拐角频率;  鲁西地区

Keywords:

the Pingyuan M_S5.5 earthquake;  apparent stress;  source parameters;  corner frequency;  western Shandong

分类号:

P315.33

DOI:

10.20015/j.cnki.ISSN1000-0666.2025.0035

摘要:

基于Brune模型,使用高频截止方法估计模型参数,得到2023年8月6日山东省德州市平原M_S5.5主震及部分M_L≥2.0余震的震源谱的特征参数,对不同震源参数之间的定标关系以及视应力的时空特征进行了分析讨论,结果显示:①主震视应力约为1.71 MPa,应力降约为3.51 MPa,矩震级为5.2,拐角频率约为0.58 Hz; ②平原地震序列视应力与震级存在线性关系,可表示为:lg δ_app=0.64M_L+2.92; ③余震视应力随时间发展逐渐减小,38次余震的视应力均小于0.15 MPa,低于鲁西地区小震平均视应力(0.16 MPa)。

Abstract:

On August 6,2023,a 5.5-magnitude earthquake occurred in Pingyuan County of Dezhou City,Shandong Province.On the basis of the Brune model,we take the minimum absolute residual between the theoretical source spectrum and the observed source spectrum as the objective function,and estimate the model parameters by using the high-cut method.Then we obtain the characteristic parameters of the source spectrum of the mainshock and some aftershocks(M_L≥2.0).We further analyze the scaling relationship between different source parameters and the spatio-temporal characteristics of apparent stress.The conclusions are as follows:①The apparent stress of the mainshock is about 1.7 MPa.The stress drop is about 3.5 MPa.Moment magnitude(M_W)is 5.2.Corner frequency(f_c)is about 0.58 Hz; ② For the Pingyuan earthquake sequence,its magnitudes have good linear relations with the corresponding apparent stress:lgδ_app=0.64M_L+2.92; ③The aftershocks' apparent stress gradually decreases with time.The apparent stress of the 38 aftershocks is under 0.15 MPa,lower than the average apparent stress(0.16 MPa)of the small earthquakes in western Shandong.

参考文献/References:

陈学忠,李艳娥,郭祥云.2011.河北文安M_S5.1地震前首都圈及邻区震源动力学参数时空变化特征[J].地震,31(4):15-25.
Chen X Z,Li Y E,Guo X Y.2011.Temporal-spatial variations of focal dynamic parameters in the capital circle and surrounding areas before the 2006 Wen'an M_S5.1 earthquake in Hebei Province[J].Earthquake,31(4):15-25.(in Chinese)
陈学忠.2005.2001年昆仑山口西 8.1级大地震前后震源区应力水平估计[J].地震学报,27(6):605-609.
Chen X Z.2005.Estimation of the stress levels in the focal region before and after the 2001 M8.1 Western Kunlun Mountain Pass earthquake[J].Acta Seismologica Sinica,27(6):605-609.(in Chinese)
黎明晓,邓世广,马玉川,等.2022.2021年11月17日江苏大丰海域M_S5.0地震总结[J].地震地磁观测与研究,43(4):148-159.
Li M X,Deng S G,Ma Y C,et al.2022.About Dafeng sea area M_S5.0 earthquake in Jiangsu on Nov.17,2021[J].Seismological and Geomagnetic Observation and Research,43(4):148-159.(in Chinese)
李翠芹,张正帅,郑建常,等.2023.沂沭断裂带中小地震震源参数特征[J].震灾防御技术,18(2):274-283.
Li C Q,Zhang Z S,Zheng J C,et al.2023.Characteristics of seismic-source spectral parameters of small earthquakes in Yishu Fault Zone[J].Technology for Earthquake Disaster Prevention,18(2):274-283.(in Chinese)
李艳娥,陈丽娟,王生文,等,2015.山东地区地震视应力时空变化特征研究[J].地震,35(2):80-90.
Li Y E,Chen L J,Wang S W,et al.2015.Temporal and spatial variations of apparent stress in Shandong Province,China[J].Earthquake,35(2):80-90.(in Chinese)
苗庆杰,刘希强,石玉燕,等,2016.利用遗传算法反演山东地区S波非弹性衰减及场地响应[J].震灾防御技术,11(4):800-807.
Miao Q J,Liu X Q,Shi Y Y,et al.2016.The inversion of S wave inelastic attenuation and site response by genetic algorithms in the Shandong region[J].Technology for Earthquake Disaster Prevention,11(4):800-807.(in Chinese)
孙业君,刘红桂,江昊琳,等.2015.江苏及邻近地区地震视应力特征研究[J].地震研究,38(1):35-41.
Sun Y J,Liu H G,Jiang H L,et al.2015.Research on the characteristics of earthquake apparent stress in Jiangsu and its adjacent area[J].Journal of Seismological Research,38(1):35-41.(in Chinese)
王宁,杨春利,王亚玲,等.2021.2020年7月12日唐山M_S5.1地震前后视应力变化[J].华北地震科学,39(3):99-104.
Wang N,Yang C L,Wang Y L,et al.2021.Apparent stress changes before and after the Tangshan M_S5.1 Earthquake on July 12,2020[J].North China Earthquake Sciences,39(3):99-104.(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 P,Zheng J C.2014.Temporal and spatial variation of apparent stress in eastern Shandong province[J].Earthquake,34(4):70-77.(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 Z L,Huang J,Lin B C.2002.Distribution of apparent stress in Western China[J].Acta Seismologica Sinica,24(3):293-301.(in Chinese)
张丽晓,闫俊岗,李艳娥,等.2018.晋冀鲁豫交界地区中小地震视应力特征研究[J].地震,38(1):117-127.
Zhang L X,Yan J G,Li Y E,et al.2018.Characteristics of apparent stresses of small and moderate earthquakes in the border area of Shanxi,Hebei,Shandong and Henan provinces[J].Earthquake,38(1):117-127.(in Chinese)
张正帅,夏彩韵,郑建常,等.2020.利用SH波对盖州震群震源谱参数的稳健反演研究[J].地球物理学进展[J].35(6):2143-2152.
Zhang Z S,Xia C Y,Zheng J C,et al.2020.Robust inversion of seismic-source spectral parameters for Gaizhou swarm based on SH-component[J].Progress in Geophysics,35(6):2143-2152.(in Chinese)
张正帅,周晨,郑建常,等.2022.长岛震群震源谱参数反演和震源参数特征[J].地震,42(1):85-98.(in Chinese)
Zhang Z S,Zhou C,Zheng J C,et al,2022.Inversion of seismic-source spectral parameters and characteristics of the source parameters for the Changdao swarm[J].Earthquake,42(1):85-98.(in Chinese)
赵翠萍,陈章立,华卫,等.2011.中国大陆主要地震活动区中小地震震源参数研究[J].地球物理学报,54(6):1478-1489.
Zhao C P,Chen Z L,Hua W,et al.2011.Study on source parameters of small to moderate earthquakes in the main seismic active region,China mainland[J].Chinese Journal of Geophysics,54(6):1478-1489.(in Chinese)
郑建常,王鹏,徐长朋,等.2016.乳山震群震源谱参数的稳健反演[J].地球物理学报,59(11):4100-4112.
Zheng J C,Wang P,Xu C P.et al.2016.Robust inversion of seismic-source spectral parameters for the 2013-2015 Rushan swarm[J].Chinese Journal of Geophicsics,59(11):4100-4112.(in Chinese)
Bessonova E N,Gotsadze O D,Borok V I,et al.1961.Investigation of the mechanism of earthquakes[J].Bulletin of the Seismological Society of America,51(1):132-133.
Brune J N.1970.Tectonic stress and the spectra of seismic shear waves from earthquakes[J].Journal of Geophysical Research,75(26):4997-5009.
Choy G L,Boatwright J L.1995.Global patterns of radiated seismic energy and apparent Stress[J].J Geophys Res,100(B9):18205-18228.
Lindley G T,Archuleta R J.1992.Earthquake source parameter and the frequency dependence of attenuation at Coalinga,Mammoth Lakes,and the Santa Cruz Mountains,California[J].Journal of Geophysical Research,97(B10):14137-14154.

备注/Memo

备注/Memo:

收稿日期:2024-07-13.
基金项目:中国地震科学实验场地震可预测性国际合作项目(2018YFE0109700); 中国地震局震情跟踪项目(2022010106).
第一作者简介:李翠芹(1987-),工程师,主要从事数字地震学方面的研究.E-mail:licuiqin12@163.com.
通信作者简介:郑建常(1978-),研究员,主要从事地震活动性及数字地震学研究.E-mail:zjcmail@yeah.ne.

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更新日期/Last Update: 2025-03-10