摘要
通过文献调研,本文回顾了国际国内主要次声波观测台阵和地震次声波的最新研究进展,目的是寻找两者的差距与不足,为国内地震次声波监测台阵建设和地震次声研究提供有益的借鉴.文章首先对全球最大、分布最广泛的IMS次声观测台阵布设方式及降低风噪系统进行了详细归纳,与国内主要次声台阵在这两方面的进展对比后发现,国际次声台阵主要以小孔径多子台的方式布设,且大多配备有不同类型的降低风噪系统;国内次声台阵主要以广域台阵方式布设,仅有少部分实验性的小孔径次声台阵,且大多未布设降低风噪系统.随后文章对各类次声台阵在地震监测预报方面的研究成果进行了认真梳理,国内外对比可以发现,国内地震次声研究主要集中在震前次声方面,国际地震次声研究主要以同震次声研究为主,主要包括震中次声、衍射次声和本地次声的识别分析,以及应用相关次声信号开展次声源定位、地震动影响分析等工作.分析结果认为,今后国内地震次声监测台阵建设方面应该进一步加强小孔径多子台台阵建设及降低风噪系统布设,这更有利于次声互相关信号提取及提高数据信噪比;国内地震次声研究需要继续开拓思路,在关注震前次声波研究的同时,进一步加强同震次声波的分析,这更有利于追踪地震次声研究最新趋势,拓展国内地震次声研究新领域.
Through the method of literature research,this paper reviews the latest study progress of the main seismic infrasonic observatory array and earthquake infrasound at home and abroad.The main purpose is to find the gap and deficiency between domestic and international,and provide beneficial reference for the construction of seismic infrasonic observatory array and earthquake infrasonic investigation in China.The infrasonic observatory array of the International Monitoring System(IMS),which was established and operated by the Comprehensive Nuclear-Test-Ban Treaty Organization(CTBTO),is the largest and most widely distributed infrasound array all over the world.Because most infrasound array layout in other countries is similar to IMS infrasound array,such as Korean,Japanese,American,and so on,the article only takes IMS infrasound array as an example to summarize infrasound array layout and wind noise reduction system of the international infrasonic array.International,most of the infrasonic arrays are small aperture with multi sub-nodes,which has three major dispositions,including four sub-nodes array,eight sub-nodes array and nine sub-nodes array;the wind noise reduction system is composed of a low impedance air inlet,a guide pipe and a composite chamber,which has four main kinds,like rosette,star,hexagonal closed pack and radial.Interiorly,most of infrasound arrays are wide-area arrays and only a few experimental array is small aperture with many sub-nodes.Both of them are not deployed with wind noise reduction systems.Moreover,this paper summarized the research achievements of the seismic monitoring and prediction applied the infrasound observation data.At abroad,these researches mainly focused on identification analysis of coseismic infrasound,including epicentral infrasound,diffraction infrasound and local infrasound.In addition,related infrasound signals are used to locate infrasound sources and analyze the impact of ground motion.At home,earthquake infrasound research mainly concentrated in the previous seismic infrasound,which is applied to predict earthquakes.The results show that the construction of seismic infrasound monitoring array and the arrangement of wind noise reduction system should be further strengthened in the future at home,which is more beneficial to obtain infrasound cross-correlation signal and improve data signal-to-noise ratio.More and more Chinese researchers should continue to explore their study ideas.While we are paying attention to the research of preearthquake infrasound,we should be further strengthen the analysis of coseismic infrasound,which is more conducive to tracking the latest trend of seismic infrasound research and expanding the new field of seismic infrasound research.
作者
郑海刚
黎哲君
黄金水
王燚坤
王雪莹
ZHENG HaiGang;LI ZheJun;HUANG JinShui;WANG YiKun;WANG XueYing(School of Earth and Space Sciences,University of Science and Technology of China,Hefei 230026,China;Anhui Seismological Bureau,Hefei 230031,China;Mengcheng Geophysics National Field Scientific Observation and Research Station,Bozhou 233500,China)
出处
《地球物理学进展》
CSCD
北大核心
2023年第1期122-136,共15页
Progress in Geophysics
基金
安徽蒙城地球物理国家野外观测站联合开放基金(MEMGO-202216,MENGO-202112)资助。
关键词
次声波
地震
IMS
次声台阵
Infrasound wave
Earthquake
International Monitoring System(IMS)
Infrasound array
