内蒙古地区非天然地震的特征与识别  

Characteristics and identification of non-natural earthquakes in Inner Mongolia

作　　者：徐岩[1] 张珂 倪铭[1] 王勇[1] 郝美仙[1] XU Yan;ZHANG Ke;NI Ming;WANG Yong;HAO Meixian(Earthquake Agency of Inner Mongolia Autonomous Region,Hohhot 010010,China)

机构地区：[1]内蒙古自治区地震局,中国呼和浩特010010

出　　处：《地震地磁观测与研究》2020年第4期42-48,共7页Seismological and Geomagnetic Observation and Research

基　　金：内蒙古自治区地震局局长基金(项目编号:2020JC07);中国地震局监测、预报、科研三结合项目(项目编号:3JH-202002005)。

摘　　要：基于2014年以来内蒙古测震台网观测报告,对所记录的非天然地震事件进行统计分析。提出了区分天然地震与非天然地震的一般方法。从地震事件的三要素、波形、频谱等方面对比分析内蒙古地区非天然地震与天然地震间的差异发现,内蒙古地区非天然地震具有发震时刻与发震位置较固定与集中、震级ML<3.5、面波较发育、能量衰减较快、优势频率主要集中在1—6 Hz等特征。并通过对比内蒙古不同地区典型震例,进一步总结出内蒙古地区非天然地震的地方性特征。研究结果有利于提高内蒙古地区非天然地震的识别能力,可为今后开展该区非天然地震自动识别研究提供基础资料。Based on observation reports of the seismic network in Inner Mongolia since 2014,the nonnatural earthquake events recorded by the network are statistically analyzed.And a general method for distinguishing natural earthquakes from non-natural earthquakes is presented.The differences between natural earthquakes and non-natural earthquakes in the Inner Mongolia region are compared and analyzed from the aspects of three elements,waveform,and spectral characteristics.And then,it is clarified that the non-natural earthquakes in the Inner Mongolia region have local characteristics,which include stable and concentrated origin times and epicentral locations,average magnitude less than 3.5(ML),well-developed surface wave,fast energy decay,and a relatively tight range of dominant frequency(1-6 Hz).By comparing and researching typical earthquakes in different regions of Inner Mongolia,the local characteristics of non-natural earthquakes in Inner Mongolia are further summarized,which is conducive to improve the identification ability of the non-natural earthquakes in Inner Mongolia and provides basic data for the future research on the automatic identification of nonnatural earthquakes in the region.

关 键 词：非天然地震 爆破 塌陷 波形 频谱 

分 类 号：P315[天文地球—地震学]