地震地磁观测与研究2017，Vol.38Issue(5)：39-43,5.DOI:10.3969/j.issn.1003-3246.2017.05.007
曹妃甸地震台网天然地震与人工爆破时频分析
Time frequency analysis of earthquakes and explosions recorded by Caofeidian Seismic Network
摘要
Abstract
Based on Matlab software, we developed a program to achieve the short time Fourier transforms. We collected all kinds of seismic blasting and natural seismic events that recorded by Caofeidian Seismic Network from 2014 to 2015. Using time frequency analysis method, the nuclear explosions, mine explosions, chemical explosions and natural earthquakes that were recorded by Caofeidian Seismic Network are studied. The instantaneous frequency is calculate. Research results show that natural earthquakes and blasting have their own characteristics in frequency range, frequency distribution and time frequency aggregation. Time frequency map of natural earthquake is multimodal, the frequency distribution is wider, and frequency components gather in S band. The time-frequency map of the artificial blasting is less peak and simple, the frequency range is narrow, and the frequency components gather in P band. This study provides a basis for distinguishing natural earthquakes and explosions in the future.关键词
天然地震/爆破/短时傅里叶变换/时频分析Key words
natural earthquake/blasting/short time Fourier transform/time frequency analys引用本文复制引用
荣伟健,赵建明,董祎玮,孟令焕,符泽宇,王妍,李金,刘楚..曹妃甸地震台网天然地震与人工爆破时频分析[J].地震地磁观测与研究,2017,38(5):39-43,5.基金项目
河北省地震局青年激励项目"曹妃甸测震台网天然地震与人工爆破的时频分析" （）
河北省地震局科技星火计划项目"滦县井水位数字化观测及监测效能评估"(项目编号:DZ20170510055) （项目编号:DZ20170510055）
