Preliminary analysis of strong motion characteristics of the Maerkang earthquake swarm in Sichuan on June 10，2022
-
摘要:
2022年6月10日，四川省马尔康市先后发生MS5.8，MS4.1，MS4.4，MS6.0和MS5.2等5次MS＞4.0地震，系震群型地震。本研究对此次震群的强震动记录进行滤波降噪处理，对加速度记录进行时频分析，并对比了五次地震间的能量分布情况。通过与第五代区划图对比，分析了不同震级地震的峰值加速度（PGA）、峰值速度（PGV）和加速度反应谱（SA）的衰减关系。同时，计算并对比了五次地震的加速度反应谱和速度反应谱，以及傅里叶幅值谱。结果表明：加速度时程的时频分析和傅里叶谱反映了五次地震具有相似的能量分布形式； 第五代区划图中我国青藏地区长轴的衰减模型可以较好地预测3次MS＞5.0地震中PGA，PGV和SA （0.2）的衰减，但一定程度上高估了SA （0.5）和SA （1.0）；同一强震动台站的加速度反应谱形状、峰值周期相同，且反应谱值均未超过当地抗震设计反应谱规范值；其中三次MS＞5.0地震的归一化反应谱在周期T＜0.2 s时高度重合；五次地震的水平向傅里叶谱形状相似，且主要频率均出现在10—20 Hz频段内；5五次地震同一台站相同方向的加速度反应谱之间、傅里叶谱之间具有很强的相关性。
Abstract:On June 10, 2022, an earthquake swarm consisting of MS5.8, MS4.1, MS4.4, MS6.0, and MS5.2 earthquakes occurred in Maerkang, Sichuan, China. This study filtered and analyzed the strong-motion records, conducted time-frequency analysis on acceleration data, and compared energy distributions among these earthquakes. By referencing the Fifth Generation Seismic Zoning Map, the attenuation relationships of peak ground acceleration （PGA）, peak ground velocity （PGV）, and spectral acceleration （SA） were analyzed. The acceleration and velocity response spectra, as well as Fourier amplitude spectra, were calculated and compared. Results indicate similar energy distribution patterns, with the attenuation model in the Fifth Generation Seismic Zoning Map predicting PGA, PGV, and SA （0.2） well of MS＞5.0 earthquakes but overestimating SA （0.5） and SA （1.0）. Response spectrum shapes and peak periods were identical at the same station, with values not exceeding local seismic design specifications. Normalized response spectra highly coincided for T＜0.2 s in MS＞5.0 earthquakes. Horizontal Fourier spectra were similar, with main frequencies in the 10−20 Hz range. Strong correlations were observed among acceleration and Fourier spectra in the same direction at the same station for all five earthquakes.
-
-
![]()
图 9 51HYS （a），51MED （b）和51MES （c）台站三分向的傅里叶谱
Figure 9. Fourier spectra of stations 51HYS （a），51MED （b） and 51MES （c） in three directions
![]()
图 1 5次地震的震中及其触发的强震动台站分布
Figure 1. Map of the epicenters of the five earthquakes and the stations that triggered the strong vibration
![]()
图 2 台站51MED （a），51MES （b）和51HYS （c）的三分量加速度时程
Figure 2. The three-component acceleration time history of stations 51MED （a），51MES （b），and 51HYS （c）
![]()
图 3 台站51MED记录的五次地震NS向地震动的时频分布
Figure 3. The time-frequency distribution of north-south ground motions of five earthquakes in the earthquake swarm recorded at station 51MED
![]()
图 4 PGA与青藏地区长轴衰减预测曲线对比
Figure 4. Comparison between PGA and major axis attenuation prediction curves in the Qinghai-Xizang region
![]()
图 5 周期为0.2 s （a），0.5 s （b）和1.0 s （c）时谱加速度SA与西藏地区长轴地震动衰减关系对比
Figure 5. Comparison of the relationship between the acceleration response spectrum value and the attenuation of major axis ground motion in Qinghai−Xizang region when the period is 0.2 s （a），0.5 s （b） and 1.0 s （c），respectively
![]()
图 6 三次MS＞5.0地震的水平向峰值速度与青藏区长轴衰减关系对比
Figure 6. Comparison of the relationship between peak velocity and attenuation in horizontal directions for three earthquakes above MS5.0
![]()
图 7 台站51MED，51MES和51HYS的谱加速度与抗震设计谱对比
Figure 7. Comparison of acceleration response spectra and seismic design spectra of stations 51MED，51MES，and 51HYS
![]()
图 8 5次地震EW向（a）、NS向（b）和UD向（c）的归一化平均反应谱
Figure 8. Normalized average response spectra of five earthquakes in the EW （a），NS （b），and UD （c） directions
![]()
图 10 51HYS （a），51MED （b）和51MES （c）台站EW （左）、NS （中）和UD （右）向的加速度谱的相关性
Figure 10. Correlation of acceleration spectra in EW （left），NS （center），and UD （right） directions at stations 51HYS （a），51MED （b），and 51MES （c）
![]()
11 台站51HYS （a）和51MED （b）的EW （左）、NS （中）和UD （右）向的傅里叶谱的相关性
11. Correlation of Fourier spectrum in EW （left），NS （center），and UD （right） directions at stations 51HYS （a） and 51MED （b）
![]()
11 台站51MES （c）的EW （左）、NS （中）和UD （右）向的傅里叶谱的相关性
11. Correlation of Fourier spectrum in EW （left），NS （center），and UD （right）directions at stations 51MES （c）
表 1 51MED，51MES和51HYS台站记录的能量持时
Table 1 Energy duration recorded by stations 51MED，51MES and 51HYS
地震 台站 5%—75%能量持时/s 5%—95%能量持时/s EW向 NS向 UD向 EW向 NS向 UD向 MS5.8 51MED 3.0 3.0 6.1 12.9 12.2 14.2 51MES 7.2 6.7 12.4 12.4 12.5 18.6 51HYS 6.3 5.5 10.8 10.5 9.8 15.0 MS4.1 51MED 10.9 9.8 10.8 24.3 24.1 23.4 51MES 11.6 9.3 13.9 16.5 15.4 19.4 51HYS 10.9 10.6 11.5 16.4 14.9 16.4 MS4.4 51MED 5.4 5.2 8.8 11.3 11.5 13.7 51MES 11.7 8.4 12.3 15.7 12.2 15.8 51HYS 11.5 9.6 11.2 13.5 11.3 13.9 MS6.0 51MED 3.1 4.0 6.4 8.9 8.7 10.7 51MES 11.9 10.1 11.9 16.3 13.9 15.2 51HYS 7.9 7.1 10.8 10.9 10.0 14.4 MS5.2 51MED 8.4 7.9 8.6 14.4 13.5 13.8 51MES 11.7 12.1 16.2 16.2 16.2 21.3 51HYS 11.7 10.6 14.2 14.3 13.3 17.9 
下载: 导出CSV
表 2 五次地震的能量集中情况
Table 2 The energy concentration of the five earthquakes
MS 能量主要分布
频段/Hz能量主要分布
时段/s能量集中
频率点/HzMS 能量主要分布
频段/Hz能量主要分布
时段/s能量集中
频率点/Hz4.1 15—20 30—35 18 5.8 13—18 37—40 15 4.4 13—17 30—35 14 6.0 10—20 35—39 14 5.2 13—17 37—45 16
下载: 导出CSV
-
崔建文,刘琼仙,段建新,林国良,杨藜薇,徐硕,李世成,包一峰,段洪杰,高东. 2016. 2014年景谷MS6.6地震及其强余震强震动观测记录及初步分析[J]. 地震研究,39(2):308–315. doi: 10.3969/j.issn.1000-0666.2016.02.018 Cui J W,Liu Q X,Duan J X,Lin G L,Yang L W,Xu S,Li S C,Bao Y F,Duan H J,Gao D. 2016. Strong-motion observation recordings of Jinggu MS6.6 earthquake and its strong aftershocks in Yunnan in 2014 and their preliminary analysis[J]. Journal of Seismological Research,39(2):308–315 (in Chinese).
戴嘉伟,冀昆,温瑞智,任叶飞. 2015. 云南景谷MS6.6地震地震动特征分析[J]. 地震工程学报,37(4):969–975. doi: 10.3969/j.issn.1000-0844.2015.04.0969 Dai J W,Ji K,Wen R Z,Ren Y F. 2015. Ground motion characteristics of the Jinggu MS6.6 earthquake in Yunnan[J]. China Earthquake Engineering Journal,37(4):969–975 (in Chinese).
国家市场监督管理总局,中国国家标准化管理委员会. 2019.GB/T 38226−2019 地震烈度图制图规范[S]. 北京:中国地震局:1−21. State Administration for Market Regulation,Standardization Administration of the People’s Republic of China. 2019. GB/T 38226−2019 Specification for Seismic Intensity Mapping[S]. Beijing:China Earthquake Administration: 1−21 (in Chinese).
韩锡勤,李恒,蔡永建. 2010. 湖北及邻区地震峰值速度衰减关系研究[J]. 大地测量与地球动力学,30(增刊):89–90. Han X Q,Li H,Cai Y J. 2010. Peak velocity attenuation relations of the earthquakes in Hubei and its adjacent area[J]. Journal of Geodesy and Geodynamics,30(S):89–90 (in Chinese).
胡小龙,王运生,刘健,刘宇,申通,辛聪聪. 2019. 九寨沟MS4.1级余震薛家坝场地地震动响应监测数据分析[J]. 科学技术与工程,19(21):49–55. doi: 10.3969/j.issn.1671-1815.2019.21.008 Hu X L,Wang Y S,Liu J,Liu Y,Shen T,Xin C C. 2019. Analysis of ground motion response monitoring data of Xuejiaba site of MS4.1 aftershock in Jiuzhaigou[J]. Science Technology and Engineering,19(21):49–55 (in Chinese).
霍俊荣. 1989. 近场强地面运动衰减规律的研究[D]. 哈尔滨:国家地震局工程力学研究所:1−299. Huo J R. 1989. Study on the Attenuation Laws of Strong Earthquake Ground Motion Near the Source[D]. Harbin:Institute of Engineering Mechanics,National Earthquake Administration:1−299 (in Chinese).
雷建成,高孟潭,俞言祥. 2007. 四川及邻区地震动衰减关系[J]. 地震学报,29(5):500–511. doi: 10.3321/j.issn:0253-3782.2007.05.007 Lei J C,Gao M T,Yu Y X. 2007. Seismic motion attenuation relations in Sichuan and adjacent areas[J]. Acta Seismologica Sinica,29(5):500–511 (in Chinese).
李文倩,何金刚,朱皓清. 2019. 基于H/V谱比法的场地卓越频率研究[J]. 内陆地震,33(4):314–320. Li W Q,He J G,Zhu H Q. 2019. Study on site predominant frequency based on H/V spectral ratio method[J]. Inland Earthquake,33(4):314–320 (in Chinese).
林国良,崔建文,杨黎薇,刘琼仙. 2016. 景谷MS6.6、MS5.8和MS5.9地震强震动记录初步分析与场地效应研究[J]. 震灾防御技术,11(2):331–341. Lin G L,Cui J W,Yang L W,Liu Q X. 2016. Preliminary analysis of strong motion observation and site effect in Jinggu MS6.6,MS5.8 and MS5.9 earthquakes[J]. Technology for Earthquake Disaster Prevention,11(2):331–341 (in Chinese).
潘毅,陈齐,曹勇,龙立,琚诚可,周祎. 2023. 马尔康6.0级震群地震藏族民居震害调查与分析[J]. 土木工程学报,57(3):1–15. Pan Y,Chen Q,Cao Y,Long L,Ju C K,Zhou Y. 2024. Seismic damage investigation and analysis of Tibetan dwellings in the MS6.0 Maerkang earthquake swarm[J]. China Civil Engineering Journal,57(3):1–15. (in Chinese).
任叶飞,温瑞智,周宝峰,黄旭涛. 2014. 2013年4月20日四川芦山地震强地面运动三要素特征分析[J]. 地球物理学报,57(6):1836–1846. doi: 10.6038/cjg20140615 Ren Y F,Wen R Z,Zhou B F,Huang X T. 2014. The characteristics of strong ground motion of Lushan earthquake on April 20,2013[J]. Chinese Journal of Geophysics,57(6):1836–1846 (in Chinese).
王莹,金昭娣,赵韬. 2024. 2022年四川马尔康6.0级震群序列震源机制特征分析[J]. 地震研究,47(3):379–390. Wang Y,Jin Z D,Zhao T. 2024. The characteristics of the focal mechanisms of the Ma’erkang MS6.0 earthquake sequence in 2022[J]. Journal of Seismological Research,47(3):379–390 (in Chinese).
王运生,贺建先,罗永红,郝子皓,刘勇,张磊. 2015. 康定MS5.8级地震冷竹关坡体内地震动响应特征[J]. 西南交通大学学报,50(5):838–844. Wang Y S,He J X,Luo Y H,Hao Z H,Liu Y,Zhang L. 2015. Seismic responses of Lengzhuguan slope during Kangding MS5.8 earthquake[J]. Journal of Southwest Jiaotong University,50(5):838–844 (in Chinese).
肖亮,俞言祥. 2022. 我国大陆地区常用浅壳地震的地震动参数衰减关系[J]. 地震学报,44(5):752–764. doi: 10.11939/jass.20220142 Xiao L,Yu Y X. 2022. Review on the commonly-used ground motion parameters attenuation relationships for shallow crustal earthquakes in Chinese mainland[J]. Acta Seismologica Sinica,44(5):752–764 (in Chinese).
俞言祥,汪素云. 2006. 中国东部和西部地区水平向基岩加速度反应谱衰减关系[J]. 震灾防御技术,1(3):206–217. doi: 10.11899/zzfy20060304 Yu Y X,Wang S Y. 2006. Attenuation relations for horizontal peak ground acceleration and response spectrum in eastern and western China[J]. Technology for Earthquake Disaster Prevention,1(3):206–217 (in Chinese).
俞言祥,李山有,肖亮. 2013. 为新区划图编制所建立的地震动衰减关系[J]. 震灾防御技术,8(1):24–33. Yu Y X,Li S Y,Xiao L. 2013. Development of ground motion attenuation relations for the new seismic hazard map of China[J]. Technology for Earthquake Disaster Prevention,8(1):24–33 (in Chinese).
俞言祥. 2016. 新一代地震区划图地震动参数衰减关系的建立与特点分析[J]. 城市与减灾,(3):34–38. doi: 10.3969/j.issn.1671-0495.2016.03.009 Yu Y X. 2016. Establishment and characteristic analysis of the attenuation relationship of ground motion parameters in the new generation seismic zoning map[J]. City and Disaster Reduction,(3):34–38 (in Chinese).
中国地震局. 2022. 中国地震局发布四川马尔康6.0级震群地震烈度图[EB/OL]. [2022−06−13]. https://www.cea.gov.cn/cea/xwzx/fzjzyw/5662853/index.html. China Earthquake Administration. 2022. The China Earthquake Administration released the earthquake intensity map of the 6.0 magnitude earthquake group in Maerkang,Sichuan[EB/OL]. [2022−06−13]. https://www.cea.gov.cn/cea/xwzx/fzjzyw/5662853/index.html (in Chinese).
中华人民共和国住房和城乡建设部,中华人民共和国国家质量监督检验检疫总局. 2010. GB 50011—2010 建筑抗震设计规范[S]. 北京:中国建筑工业出版社:1−510. Ministry of Housing and Urban-Rural Development of the People’s Republic of China,General Administration of Quality Supervision,Inspection and Quarantine of the People’s Republic of China. 2010. GB 50011−2010 Code for Seismic Design of Buildings[S]. Beijing:China Architecture and Building Press:1−510 (in Chinese).
计量
- 文章访问数: 303
- HTML全文浏览量: 40
- PDF下载量: 166
