摘要
根据近震沉积层基底界面转换波Sp震相和远震深度震相sP、pP的特征,对2018-02-12永清M4.3地震的震源深度进行分析,运用F-K波数与频率方法拟合近震理论波形、Teleseis方法拟合远震理论波形,并与实际波形对比,对震源深度进行测试。结果表明,永清地震的震源深度为16~17 km,从发震位置和震源深度分析来看,此次地震发生在中上地壳,与区域内其他地震事件类似。
According to the sP and pP characteristics of the seismic wave Sp phase and the teleseismic depth of the basement interface of the near-seismic sedimentary layer,we analyze the focal depth of the February 12,2018 Yongqing M4.3 earthquake.F-K wave number and frequency method are used to fit.The near-seismic theoretical waveform and Teleseis method fits the far-seismic theoretical waveform and we compare it with the actual waveform to test the focal depth.The results show that the focal depth of the Yongqing earthquake is in the range of 16 km to 17 km.From the analysis of the location of the earthquake and the depth of the source,the earthquake occurred in the upper middle crust,similar to other seismic events in the area.
作者
朱冰清
曹井泉
董一兵
谭毅培
赵黎明
臧翀
徐恒垒
倪四道
ZHU Bingqing;CAO Jingquan;DONG Yibing;TAN Yipei;ZHAO Liming;ZANG Chong;XU Henglei;NI Sidao(School of Earth and Space Sciences,University of Science and Technology of China,96 Jinzhai Road,Hefei 230026,China;Tianjin Earthquake Agency,19 Youyi Road,Tianjin 300201,China;Hebei University of Economics and Business,47 Xuefu Road,Shijiazhuang 050061,China;State Key Laboratory of Geodesy and Earth’Dynamic,Institute of Geodesy and Geophysics,CAS,340 Xudong Street,Wuhan 430077,China)
出处
《大地测量与地球动力学》
CSCD
北大核心
2020年第3期291-298,共8页
Journal of Geodesy and Geodynamics
基金
天津市科技重大专项和工程(18ZXAQSF00110)~~
关键词
永清地震
震源深度
沉积层基底转换波
深度震相
Yongqing earthquake
focal depth
basement converted wave of sedimentary layer
deep phase
