地震学报2017，Vol.39Issue(2)：273-285,13.DOI:10.11939/jass.2017.02.010
烈度仪记录与强震及测震记录的对比分析——以2015年河北昌黎ML4.5地震为例
Comparative analyses of records by seismic intensity instrument with strong ground motion records and seismograph stations records: Taking the ML4.5 Changli earthquake of Hebei Province for an example
摘要
Abstract
Based on seismic records of Changli ML4.5 earthquake in Hebei Province,by analyzing two groups of waveforms and comparing seismic noise characteristics of seismograph station,strong ground motion station and seismic intensity instrument (SⅡ) station,this paper acquires basic understanding of each kind of these stations,especially the SⅡ station,such as the ability to record micro-earthquakes.The results show that,in certain frequency band (1-10 Hz),seismic waveforms are quite similar for both the SⅡ station and the strong ground motion station or the seismograph station,but large differences appear in mid-long period part.For the same frequency band (0.1-10 Hz bandpass filtered),velocity history and displacement history that are integrated by the SⅡ station data have good correlations and coherences with those from seismograph stations and strong ground motion stations,suggesting that the SⅡ records have certain integrability to some extent.The noise levels of SⅡ stations are far beyond seismograph stations and strong ground motion stations,normally are instrument noise without micro-tremor at all.As a result of only a 16 bit A/D convertor applied,the precision of sampled data is limited and then the accuracy of seismic phase picking will be adversely affected.In conclusion,we think that SⅡ stations are more suitable for moderate to large near-field earthquakes monitoring.关键词
烈度仪/高频部分/噪声/A/D转换器Key words
seismic intensity instrument/high frequency/seismic noise/A/D convertor分类
天文与地球科学引用本文复制引用
张红才,金星,王士成,李军..烈度仪记录与强震及测震记录的对比分析——以2015年河北昌黎ML4.5地震为例[J].地震学报,2017,39(2):273-285,13.基金项目
地震科技星火计划(XH16020Y)资助. （XH16020Y）
