Analysis on strong ground motion records of Guangdong Xuwen ML4.2 earthquake on November 22, 2015
-
摘要: 2015年11月22日07时43分广东省徐闻县发生ML4.2地震，海南省强震动台网中心记录到3组三分向加速度记录，这是海南强震动台网建成后首次记录到强震动地震波形，常规处理后得到9条零基线校正后的三分向峰值加速度（PGA）。对3个台站的加速度记录进行分析，绘制校正后的加速度、速度、位移时程曲线及加速度反应谱，为中国南部工程震害调查提供参考资料。结果表明，此次地震记录到的强震记录PGA介于0.8—10.2 cm/s²之间，距离震中位置最近的火山口台（HSK）记录到最大PGA值。Abstract: ML4.2 earthquake occurred in Xuwen County, Guangdong Province at 07:43 on November 22, 2015. The Hainan Strong Motion Network Center collected three sets of three-direction acceleration records, which was the first time to record strong motion seismic waveform after the completion of Hainan strong motion network. After conventional processing, the corrected peak ground accelerations (PGA) of nine zero-baselines were obtained. The PGA records of three stations were analyzed. And the corrected time-history curves of acceleration, velocity, displacement and acceleration response spectrum were plotted, which could provide reference for earthquake damage investigation in Southern China. The results exhibited that the PGA values of the strong earthquake were ranged from 0.8 to 10.2 cm/s², and the maximum PGA value was recorded at Huoshankou Staion (HSK) which is closest to the epicenter.
-
Key words:
- Hainan island /
- Xuwen ML4.2 earthquake /
- strong motion record
-
图 2 火山口台强震记录分析
（a） 校正加速度时程曲线；（b） 傅里叶谱；（c） 校正速度时程曲线；（d） 加速度反应谱
Figure 2. Analysis of strong motion records at HSK station
（a） Acceleration time-history；（b） Fourier spectrum；（c） Velocity time-history；（d） Acceleration response spectrum
图 3 三江台强震记录分析
（a） 校正加速度时程曲线；（b） 傅里叶谱；（c） 校正速度时程曲线；（d） 加速度反应谱
Figure 3. Analysis of strong motion records at SAJ station
（a） Acceleration time-history；（b） Fourier spectrum；（c） Velocity time-history；（d） Acceleration response spectrum
图 4 青山岭台强震记录分析
（a） 校正加速度时程曲线；（b） 傅里叶谱；（c） 校正速度时程曲线；（d） 加速度反应谱
Figure 4. Analysis of strong motion records at QSL station
（a） Acceleration time-history；（b） Fourier spectrum；（c） Velocity time-history；（d） Acceleration response spectrum
表 1 数字强震仪主要技术指标
Table 1. Main technical indexes of the digital strong motion seismograph
仪器类型 通道数 动态范围/dB 最大记录范围/g 采样率/sps 频率范围/Hz 数据存储/MB MR2002 3 108 ±1 200 0—200 32 
下载: 导出CSV
表 2 强震动记录及相关参数
Table 2. Strong motion records and its relative parameters
强震记录台站 场地类型 仪器型号 震中距/km PGA/（cm·s−2） 名称 代码 EW NS UD 火山口 HSK 土层 MR2002 41 10.2 6.3 8.5 三江 SAJ 土层 MR2002 65 5.5 4.6 3.9 青山岭 QSL 基岩 MR2002 92 1.2 0.8 2.4
下载: 导出CSV
-
[1] 张慧,李盛,王惠琳,等. 2015年11月22日广东徐闻ML4.2地震概述[J]. 华南地震,2017,37(2):17-21Zhang H,Li S,Wang H L,et al. Summary of the Xuwen ML4.2 earthquake occurred on November 22nd,2015[J]. South China Journal of Seismology,2017,37(2):17-21 [2] 徐晓枫,王惠琳,胡久常,等. 2015年11月22日广东徐闻ML4.2地震震源机制解及精定位分析[J]. 地震地磁观测与研究,2017,38(2):1-6 doi: 10.3969/j.issn.1003-3246.2017.02.001Xu X F,Wang H L,Hu J C,et al. Focal mechanism solution and accurate location of Xuwen ML4.2 earthquake in Guangdong Province on Nov. 22,2015[J]. Seismological and Geomagnetic Observation and Research,2017,38(2):1-6 doi: 10.3969/j.issn.1003-3246.2017.02.001 [3] 曾维顺,陈祥开,杨漾,等. 海南岛及邻区地震烈度衰减关系研究[J]. 地震科学进展,2020,50(2):27-31Zeng W S,Chen X K,Yang Y,et al. Study on seismic intensity attenuation law in Hainan island and its adjacent areas[J]. Progress in Earthquake Sciences,2020,50(2):27-31 [4] 徐钦,田秀丰,潘章容,等. 2016年3月21日金塔县MS4.7地震强震动记录分析[J]. 地震地磁观测与研究,2017,37(2):94-97 doi: 10.3969/j.issn.1003-3246.2017.02.017Xu Q,Tian X F,Pan Z R,et al. About strong ground motion records of Jinta MS4.7 earthquake on March 21,2016[J]. Seismological and Geomagnetic Observation and Research,2017,37(2):94-97 doi: 10.3969/j.issn.1003-3246.2017.02.017 [5] 徐钦,李佐唐,田秀丰,等. 青海门源5.1级地震强震动记录及初步分析[J]. 地震工程学报,2014,36(4):1071-1075 doi: 10.3969/j.issn.1000-0844.2014.04.1071Xu Q,Li Z T,Tian X F,et al. Preliminary analysis of strong ground motion records of the Menyuan MS5.1 earthquake[J]. China Earthquake Engineering Journal,2014,36(4):1071-1075 doi: 10.3969/j.issn.1000-0844.2014.04.1071 [6] 赵昆,林国良,段建新,等. 龙江特大桥场地强震动观测系统设计[J]. 地震科学进展,2020,50(6):8-13Zhao K, Lin G L, Duan J X, et al. Design of site strong motion observation system for the Longjiang bridge[J]. Progress in Earthquake Sciences,2020,50(6):8-13 [7] 温瑞智,王宏伟. 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,2020,50(7):9-13Wen R Z, Wang H W. Strong-motion recordings in MS5.1 Guye,Tangshan earthquake on July 12,2020[J]. Progress in Earthquake Sciences,2020,50(7):9-13 [8] 徐杨,赵向佳. 山西原平4.2级地震山西数字强震动记录分析[J]. 山西地震,2009(1):18-20,38 doi: 10.3969/j.issn.1000-6265.2009.01.004Xu Y,Zhao X J. Analysis on records of Shanxi Digital Strong Motion Network for Yuanping M4.2 earthquake,Shanxi[J]. Earthquake Research in Shanxi,2009(1):18-20,38 doi: 10.3969/j.issn.1000-6265.2009.01.004 [9] 贾晓辉,李雪英,毛国良,等. 2012年5月28日河北唐山MS4.7地震的数字强震动记录分析[J]. 华北地震科学,2017,35(1):44-49,55 doi: 10.3969/j.issn.1003-1375.2017.01.007Jia X H,Li X Y,Mao G L,et al. Analysis on digital strong motion records of Hebei Tangshan MS4.7 earthquake on May 28,2012[J]. North China Earthquake Sciences,2017,35(1):44-49,55 doi: 10.3969/j.issn.1003-1375.2017.01.007 -
点击查看大图
计量
- 文章访问数: 98
- HTML全文浏览量: 70
- PDF下载量: 10
