摘要
对2004—2012年山西地震台网记录的山西地区ML≥2.5爆破、塌陷以及天然地震波形进行对比分析,结果显示:与天然地震相比,爆破、塌陷具有相对独特的震相特征,尤其是近距离的爆破、塌陷易于识别;远距离的则难以区分。在此基础上,对3种地震动波形进行频谱分析,结果显示:塌陷的优势频率较低,集中在1—3 Hz;爆破的优势频率较高,集中在1—6 Hz;地震的优势频率较宽,集中在0—20 Hz,为进一步甄别爆破、塌陷、天然地震提供了新的识别方法。
analyzed and summarized magnitude ML≥ 2.5 explosion, collapse the special characteristics of seismic phases occurred in Shanxi Province in 2004—2012, and spectrum analyzed the nonnatural earthquake explosion, collapse, different earthquakes showed that there is a big difference in the spectral characteristics and advantage frequency. Advantage frequency of collapse was lower, mainly concentrated from1 Hz to 3 Hz;Advantage frequency of explosion was higher, mainly concentrated from 1 Hz to 6 Hz;Advantage frequency of earthquake was wide mainly concentrated from 0 Hz to 20 Hz.
出处
《地震地磁观测与研究》
2015年第3期63-66,共4页
Seismological and Geomagnetic Observation and Research
基金
山西省地震局科研项目(部分内容)(SBK-1305)
关键词
爆破
塌陷
震相
频谱
explosion
collapse
seismic phases
spectrum
