Analysis of Strong Motion Records of Hebei Yongqing MS4.3 Earthquake on February12, 2018
-
摘要: 2018年2月12日河北省廊坊市永清县发生4.3级地震，震中位于廊固凹陷内的河西务断裂附近，国家强震动台网中心获取74组强震动记录，本文对触发台站进行场地分类，结果显示大部分为Ⅰ类场地(51.35%)，其次为Ⅱ类场地(35.14%)和Ⅲ类场地(13.51%)。根据5个典型台站加速度时程记录及反应谱分析本次地震强震动特征，并对各台站峰值加速度反应谱与方位角和震中距的关系进行分析。采用克里格插值方法绘制地震仪器烈度分布图，由于台站分布不均，导致极震区附近烈度影响场计算缺值现象，本文通过拟合本次地震强震动记录得到该地区地震动衰减关系，在空白区域建立空间随机假设台站进行补点插值，解决了计算缺值问题，为缺少台站记录的震区提供准确快速制作烈度分布图的思路，为震害调查和地震应急救援提供重要依据。Abstract: The strong motion records of Yongqing M4.3 earthquake occurring on February 12, 2018, were obtained by 77 strong motion stations of The China Strong Motion Network Center, and the seismic occurred near the Hexiwu fault of Langfang-Guan Depression. The paper classified the site of triggering stations, and the result show that most of them are Category I sites (51.35%), followed by Category Ⅱ sites (35.14%) and Category Ⅲ sites (13.51%). The Strong motion characteristics were analyzed based on the acceleration time duration and response spectrum of five typical stations, and the relation among the peak ground acceleration, epicentral distance and azimuth angles were discussed. The contour map of instrumental intensity was drawn using the Kreager interpolation method. Due to the uneven distribution of stations, the calculation results of the intensity influence field shows lack of numerical value near the epicentral area. In the paper, the ground motion attenuation relationship of the area is obtained by fitting the strong motion records, then establishes random hypothesis station in the space to make additional point interpolation, which solves the problem of the lack of the calculating numerical value of earthquake intensity influence field. The paper provides an idea of mapping accurate and rapid intensity distribution for the areas where earthquake will occur in the future and lack of station records, and provides an important basis for earthquake investigation and earthquake emergency rescue.
-
图 1 永清4.3级地震构造背景
(1)施庄断裂(2)南口山前断裂(3)南口-孙河断裂(4)小汤山-东北旺断裂(5)黄庄-高丽营断裂 (6)顺义-前门-良乡断裂(7)南苑-通县断裂(8)新夏垫断裂(9)夏垫断裂(10)大兴凸起东缘断裂 (11)蓟县山前断裂(12)宝坻断裂(13)桐柏断裂(14)河西务断裂(15)天津断裂(16)大城东断裂 (17)沧东断裂(18)海河断裂(19)牛驼镇凸起东缘断裂(20)徐水断裂(21)东垒子-涞水断裂 (22)永定河断裂(23)徐水南断裂
Figure 1. The seismotectonic background map of the Yongqing MS4.3 earthquake
图 2 永清4.3级地震触发台站分布图
Figure 2. The distribution of seismic trigger station of Yongqing MS4.3 earthquake
图 7 峰值加速度反应谱与震中距、方位角关系图
Figure 7. The relation among the peak ground acceleration and epicentral distance、azimuth angles
图 8 永清4.3级地震校正前仪器烈度分布图
Figure 8. The distribution of the un-corrected instrumental seismic intensity of Yongqing MS4.3 earthquake
图 9 永清4.3级地震现场调查烈度分布图
Figure 9. The distribution of site investigation intensity of Yongqing MS4.3 earthquake
图 10 峰值加速度随震中距的变化
Figure 10. `The change of peak ground acceleration with epicentral distance
图 11 永清4.3级地震校正后烈度分布图
Figure 11. The distribution of the corrected instrumental seismic intensity of Yongqing MS4.3 earthquake
表 1 强震动记录(震中距＜50km)及相关参数
Table 1. Strong motion records(epicenter distance < 50km) and related parameters
台站名称 台站代码 仪器型号 震中距/km PGA/cm·s-2 EW SN UD 觅子店 11MZD REFTEK/SLJ-100 38.4 36.1 40.4 8.5 红星中学 11YHZ REFTEK/SLJ-100 43.4 -5.4 -4.6 10.8 于家务 11YJW ETNA/ES-T 36.8 -21.7 -18.5 -8.1 张家湾中学 11ZJW REFTEK/SLJ-100 47.9 -5.8 4.2 -4.4 长子营 11ZZY REFTEK/SLJ-100 29.4 5.0 -7.9 -3.5 
下载: 导出CSV
-
崔建文, 刘琼仙, 段建新等, 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.地震研究, 39(2):308-315. 郭秋娜, 周月玲, 李姜等, 2018.九寨沟MS7.0地震强震动特征及构造影响.地震地磁观测与研究, 39(4):25-32. 国家地震局震害防御司, 1995.中国历史强震目录(公元前23世纪-公元1911年).北京:地震出版社. 李俊, 苏枫, 米宏亮等, 2010.ShakeMap及其在地震动快速预估中的应用.中国地震, 26(1):103-111. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=zgdz201001010 吕俊强, 温瑞智, 曾宪伟, 2015.宁夏永宁M4.6级地震强震记录分析.防灾减灾学报, 31(2):19-23. 冉志杰, 杨歧焱, 周月玲等, 2012.唐山丰南M 4.1级地震强震记录分析.震灾防御技术, 7(4):367-376. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=zzfyjs201204004 田秀丰, 李佐唐, 徐钦等, 2013.甘肃岷县漳县6.6级地震强震动观测记录与初步分析.地震工程学报, 35(3):497-502. 王国新, 2001.强震动衰减研究.哈尔滨:中国地震局工程力学研究所. 王海云, 2011.渭河盆地中土层场地对地震动的放大作用.地球物理学报, 54(1):137-150. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=dqwlxb201101015 王海云, 谢礼立, 2010.自贡市西山公园地形对地震动的影响.地球物理学报, 53(7):1631-1638. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=dqwlxb201007014 王文才, 李佐唐, 石文兵, 2018.2017年6月3日内蒙古阿拉善左旗5.0级地震强震记录及特征分析.地震工程学报, 40(1):139-145. 王晓山, 周月玲, 冯向东, 2018.2018年2月12日河北永清4.3级地震.华北地震科学, 36(2):18-22, 42. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=hbdzkx201802003 温瑞智, 冀昆, 任叶飞等, 2015.基于谱比法的我国强震台站场地分类.岩石力学与工程学报, 34(6):1236-1241. 温瑞智, 任叶飞, 黄旭涛等, 2013.芦山7.0级地震强震动记录及其震害相关性.地震工程与工程振动, 33(4):1-14. 徐钦, 田秀丰, 潘章容等, 2017.2016年3月21日金塔县MS4.7地震强震动记录分析.地震地磁观测与研究, 38(2):94-97. 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.震灾防御技术, 8(1):24-33. http://zzfy.eq-j.cn/zzfyjs/ch/reader/view_abstract.aspx?flag=1&file_no=20130103&journal_id=zzfyjs 周月玲, 彭远黔, 陈建强等, 2018.河西务断裂活动性的综合探测研究.震灾防御技术, 13(3):610-618. http://zzfy.eq-j.cn/zzfyjs/ch/reader/view_abstract.aspx?flag=1&file_no=20180312&journal_id=zzfyjs 朱升初, 王恒知, 詹小艳, 2018.2016年10月20日江苏射阳M4.4地震的强震动记录分析.地震工程学报, 40(S1):123-128. Wald D. J., Quitoriano V., Heaton T. H., et al., 1999. TriNet "shake Maps":Rapid generation of peak ground motion and intensity maps for earthquakes in Southern California. Earthquake Spectra, 15(3):537-555. doi: 10.1193/1.1586057 -
点击查看大图
计量
- 文章访问数: 167
- HTML全文浏览量: 57
- PDF下载量: 6
- 被引次数: 0
