The strong ground motion characteristics of MS6.0 Luxian，Sichuan，earthquake on 16 September 2021
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摘要: 2021年9月16日4时33分在四川省泸州市泸县发生MS6.0地震，震中附近的强震动观测台网获取了1 320组三分向加速度记录，对有效记录进行常规处理后计算出地震动相关参数，并利用克里金插值方法得到峰值加速度PGA、峰值速度PGV和拟加速度反应谱的空间分布图。结果显示，极震区与中远场的长轴方向有较大差异，地震动表现出沿断裂走向衰减较慢的特性。通过与常用衰减关系预测值进行对比，分析了PGA和多个周期的拟加速度反应谱随距离的衰减特性，结果显示此次地震的PGA相比衰减关系预测值偏小，拟加速度反应谱相比各经验预测值呈现周期越大衰减变慢的特点，体现出川东南地区特有的衰减规律。最后分析了本次地震获得的最大加速度记录，进一步验证了局部地形和场地对地震动有显著影响。Abstract: At 04:33 on September 16, 2021, a MS6.0 earthquake occurred in Luxian, Luzhou city, Sichuan Province. Based on the 1 320 sets of three-dimensional acceleration recordings from the strong motion network nearby the epicenter, we calculated the ground motion related parameters after routine processing of the recordings. With the Kriging interpolation method, we obtained the spatial distribution maps of PGA, PGV and pseudo-acceleration response spectrum. The results show that there are great differences in the direction of the major axis between the meizoseismal area and the mid-far field, which reflects the characteristics of slow attenuation along the fault strike. By comparing the calculated data with the commonly used attenuation relationship prediction values, we analyzed the attenuation characteristics of PGA and pseudo-acceleration response spectrum of multiple periods with distance. It shows that the PGA value of this earthquake is generally smaller than the predicted value by the attenuation relationship. And the pseudo-acceleration response spectrum shows that the larger the period, the slower the attenuation by comparing with the empirical predicted values. This reflects the local attenuation characteristics of the southeastern Sichuan. We also analyzed the maximum acceleration record obtained from this earthquake. Finally we verified that the local topography and site have significant impact on ground motion.
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图 3 泸县MS6.0地震地震动参数空间分布图
图（a）和（b）分别为合成PGA和PGV，图（c）为仪器烈度，图（d）−（f）分别为周期0.3，1，3 s时的拟加速度反应谱
Figure 3. Spatial distribution maps of ground motion parameters of Luxian MS6.0 earthquake
Figs. （a） and （b） are synthetic PGA and synthetic PGV respectively，and Fig. （c） is instrument intensity，and Figs. （d）−（f） are pseudo-acceleration response spectrum with periods of 0.3，1 and 3 s respectively
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图 1 获取泸县MS6.0地震记录的台站分布图
Figure 1. Distribution of the strong-motion stations from which the Luxian MS6.0 earthquake records were received
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图 2 泸县MS6.0地震调查烈度和震中50 km范围内台站仪器烈度分布图
Figure 2. Investigation intensity for Luxian MS6.0 earthquake and instrument intensity distribution of the stations within 50 km away from the epicenter
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图 4 三类台站实测PGA值随震中距的衰减分布
Figure 4. Attenuation distribution of the measured PGA values with epicentral distance for the three types of stations
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图 5 各周期T 5%阻尼比拟加速度反应谱PSA随震中距的分布
Figure 5. Distribution of 5% damping ratio pseudo-acceleration response spectrum with epicentral distance in each period T
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图 6 SC.K2803台站的加速度a时程（a）和5%阻尼比拟加速度反应谱PSA （b）
Figure 6. Acceleration time history （a） and 5%-damped pseudo-acceleration response spectrum （b） at the station SC.K2803
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图 7 SC.K2803台站的局部地形（a）和观测室墙体裂缝（b）
Figure 7. Local topography at the station SC.K2803 （a） and the wall crack of the house （b）
表 1 地震动记录及相关参数表
Table 1 Seismic records and related parameters
台站代码 震中距/km 峰值加速度/（cm·s−2） 峰值速度/（cm·s−1） 仪器烈度 EW NS UD EW NS UD SC.K2803 6.7 563.57 756.02 393.09 17.58 32.17 8.15 8.3 SC.C2202 13.3 145.56 151.14 93.59 6.13 5.45 4.47 6.3 SC.51DST 19.3 76.15 83.49 30.81 3.89 3.80 2.85 6.1 SC.K2802 20.1 47.05 52.00 23.50 2.49 2.00 1.69 5.4 SC.LCSN 20.6 38.27 37.57 22.11 2.00 1.52 1.43 5.2 SC.FSTS 20.7 34.60 40.51 20.54 2.54 2.01 1.86 5.3 SC.C2206 23.9 76.46 61.61 81.65 5.19 2.62 4.27 6.2 SC.E0401 26.5 47.41 27.06 46.66 2.43 2.90 1.66 5.5 SC.LXXT 29.1 38.70 43.53 16.93 1.31 1.02 1.54 5.0 SC.C2203 31.3 33.59 17.64 53.42 1.68 1.43 2.31 5.4 SC.K2801 31.4 26.49 30.28 37.74 1.65 1.68 1.56 5.0 SC.E0202 31.8 20.65 10.24 17.10 1.30 1.62 0.79 4.3 SC.C2201 32.1 47.07 23.70 33.92 2.67 2.17 1.75 5.4 SC.E2101 33.5 21.22 22.97 25.98 1.46 1.95 1.24 4.8 CQ.J0001 34.2 19.70 13.13 21.15 0.92 0.76 1.34 4.3 SC.Q2304 36.7 16.17 19.36 11.29 1.15 1.05 1.71 4.6 SC.E0201 37.1 24.68 9.54 24.73 1.00 1.28 1.72 4.6 SC.CF001 38.3 29.77 28.16 14.38 1.39 1.31 1.29 4.8 SC.DANF 38.4 12.93 14.83 10.47 0.92 1.06 0.99 4.3 SC.C2204 39.9 15.59 15.24 15.49 1.02 1.22 1.47 4.3 SC.C0401 44.9 11.78 17.17 8.94 0.64 1.13 0.72 4.2 SC.C1102 45.5 14.45 8.30 23.81 0.72 0.77 1.39 4.5 SC.EN001 46.8 21.75 15.30 7.03 0.80 0.78 1.28 4.4 SC.E0302 49.4 8.35 6.43 9.79 0.66 0.66 0.85 3.5 
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国家市场监督管理总局, 国家标准化管理委员会. 2020. 中国地震烈度表GB/T 17742—2020[S]. 北京: 中国标准出版社: 8–10. State Administration for Market Regulation, Standardization Administration. 2020. The Chinese Seismic Intensity Scale GB/T 17742−2020[S]. Beijing: China Quality and Standards Publishing & Media Co., Ltd: 8–10 （in Chinese）.
江鹏,李萍萍,李同林,温瑞智. 2021. 2020年10月22日四川北川MS4.7地震强震动特征分析[J]. 地球与行星物理论评,52(2):227–233. Jiang P,Li P P,Li T L,Wen R Z. 2021. Strong-motion recordings in MS4.7 Beichuan,Sichuan earthquake on October 22,2020[J]. Reviews of Geophysics and Planetary Physics,52(2):227–233 (in Chinese).
金星,马强,李山有. 2004. 利用数字强震仪记录实时仿真地动速度[J]. 地震工程与工程振动,24(1):49–54. doi: 10.3969/j.issn.1000-1301.2004.01.007 Jin X,Ma Q,Li S Y. 2004. Real-time simulation of ground velocity using digital accelerograph record[J]. Earthquake Engineering and Engineering Vibration,24(1):49–54 (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).
李宏男. 2013. 地震工程学[M]. 北京: 机械工业出版社: 51–53. Li H N. 2013. Earthquake Engineering[M]. Beijing: China Machine Press: 51–53 （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).
四川省地震局. 2021. 四川省地震局发布泸县6.0级地震烈度图[EB/OL]. [2021-09-20]. http://www.scdzj.gov.cn/xwzx/fzjzyw/202109/t20210920_50116.html. Sichuan Earthquake Agency. 2021. The intensity map of Luxian MS6.0 earthquake released by Sichuan Earthquake Agency[EB/OL]. [2021-09-20]. http://www.scdzj.gov.cn/xwzx/fzjzyw/202109/t20210920_50116.html （in Chinese）.
温瑞智,任叶飞,黄旭涛,卢滔,齐文浩. 2013. 芦山7.0级地震强震动记录及其震害相关性[J]. 地震工程与工程振动,33(4):1–14. Wen R Z,Ren Y F,Huang X T,Lu T,Qi W H. 2013. Strong motion records and their engineering damage implications for Lushan earthquake on April 20,2013[J]. Journal of Earthquake Engineering and Engineering Vibration,33(4):1–14 (in Chinese).
温瑞智,王宏伟. 2020. 2020年7月12日唐山古冶MS5.1地震的强震动特征[J]. 地震科学进展,50(7):9–13. doi: 10.3969/j.issn.2096-7780.2020.07.002 Wen R Z,Wang H W. 2020. Strong-motion recordings in MS5.1 Guye,Tangshan earthquake on July 12,2020[J]. Progress in Earthquake Sciences,50(7):9–13 (in Chinese).
肖亮. 2012. 水平向基岩强地面运动参数衰减关系研究[J]. 国际地震动态,(1):37–39. Xiao L. 2012. Study on the attenuation relationships of horizontal ground motion parameters near the sourse of rock site[J]. Recent Developments in World Seismology,(1):37–39 (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: 10.3969/j.issn.1673-5722.2006.03.005 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. doi: 10.3969/j.issn.1673-5722.2013.01.003 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).
袁一凡, 田启文. 2012. 工程地震学[M]. 北京: 地震出版社: 91–92. Yuan Y F, Tian Q W. 2012. Engineering Seismology[M]. Beijing: Seismological Press: 91–92 （in Chinese）.
张红才,金星,王士成,李军. 2017. 烈度仪记录与强震及测震记录的对比分析:以2015年河北昌黎ML4.5地震为例[J]. 地震学报,39(2):273–285. doi: 10.11939/jass.2017.02.010 Zhang H C,Jin X,Wang S C,Li J. 2017. Comparative analyses of records by seismic intensity instrument with strong ground motion records and seismograph stations records:Taking the ML4.5 Changli earthquake of Hebei Province for an example[J]. Acta Seismologica Sinica,39(2):273–285 (in Chinese).
中国地震台网中心. 2021. 中国地震台网中心发布9月16日4时33分在四川泸州市泸县发生6.0级地震[EB/OL]. [2021-09-16]. https://www.cenc.ac.cn/eportal/ui?pageId=300453&articleKey=372366&columnId=323877. China Earthquake Networks Center. 2021. A magnitude 6.0 earthquake occurred in Luxian County, Luzhou City, Sichuan Province at 4:33 on September 16 released by China Earthquake Networks Center [EB/OL].[2021-09-16]. https://www.cenc.ac.cn/eportal/ui?pageId=300453&articleKey=372366&columnId=323877 （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. 建筑抗震设计规范GB 50011—2010[S]. 北京: 中国建筑工业出版社: 33–35. 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. Code for Seismic Design of Buildings GB 50011−2010[S]. Beijing: China Architecture & Building Press: 33–35 （in Chinese）.
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