太原基准地震台核爆震相识别  

Identification of nuclear explosion waveform recorded by Taiyuan Fundamental Seismic Station

作　　者：靳玉贞[1,2] 刘炜 何佳[1,2] 杨世英[1,2] 孟彩菊[1,2] 刘晓萍[2,4] Jin Yuzhen;Liu Wei;He Jia;Yang shiying;Meng Caiju;Liu xiaoping(Taiyuan Seismic Station,Shanxi Province 030025,China;National Continental Rift Valley Dynamics Observatory of Taiyuan,Shanxi Province 030025,China;Datong Central Seismic Station,Shanxi Province 037006,China;Qixian Earthquake Agency,Shanxi Province 030900,China)

机构地区：[1]太原基准地震台,中国山西030025 [2]太原大陆裂谷动力学国家野外科学观测研究站,中国山西030025 [3]大同中心地震台,中国山西037006 [4]祁县地震台,中国山西0370900

出　　处：《地震地磁观测与研究》2019年第4期59-64,共6页Seismological and Geomagnetic Observation and Research

基　　金：山西省地震局科研项目(项目编号：SBK-1305)

摘　　要：对太原基准地震台记录的核爆及天然地震波形进行对比分析,结果显示:①与天然地震相比,核爆震相特征相对独特;②地震优势频率较窄,而核爆优势频率则较宽,即对于震中距相近、当量不同的核爆波形,太原台记录的时频变化特征相似;③对于震中距相近的天然地震与核爆波形,太原台记录的时频特征差异明显。Comparing the waveform of nuclear explosions with that of the natural earthquakes recorded by Taiyuan Fundamental Seismic Station,the paper obtains the results as follows:①The phase characteristics of nuclear explosion are unique compared with that of natural earthquakes;②The dominant frequency band of natural earthquakes is narrow and that of nuclear explosions is relatively wider.Waveform from nuclear explosions with similar distance but different TNT equivalent has similar time-frequency features;③Waveform from natural earthquakes and nuclear explosions with similar distances has quite different time-frequency features.

关 键 词：核爆 地震 频谱 

分 类 号：P31[天文地球—固体地球物理学]