单台数字测震仪地震实时准确报警方法研究  

Research on Seismic Real-time Accurate Alarm Method by Single Digital Seismograph

作　　者：李万金[1,2] 陈阳[2] 

机构地区：[1]中国科学技术大学地球和空间科学学院,安徽合肥230026 [2]云南省地震局个旧地震台,云南个旧661000

出　　处：《地震研究》2014年第2期251-256,共6页Journal of Seismological Research

摘　　要：针对目前单台地震波形监视记录软件地震检测报警准确率不高的原因来改进地震检测算法。以个旧地震台CTS-1E型甚宽频带数字测震仪记录的地震波形为例,先将宽频带数字地震记录波形无延时的实时仿真成短周期地震波形以滤除大周期的背景干扰,进而得到纵波记录特征突出的地震波形;然后运用改进后的STA/LTA算法来检测地震,从而可以显著提高单台地震实时报警的准确性。Because of the accuracy rate of the earthquake detection and alarm is low by use of the single station seismic waveform monitoring and recording software,the seismic detection algorithm is improved.Taking the seismic waveform recorded by CTS-1E very broadband digital Seismograph at Gejiu Station as an example,firstly,the broadband digital seismic waveform is simulated into a short period seismic waveform to filter out the long cycle of background interference without delay in real-time,so the seismic waveform with the prominent feature of P wave recording is obtained.Secondly,the improved STA/LTA algorithm is used to detect the earthquake,which can significantly improve the accuracy of real-time alarm of single seismic station.

关 键 词：地震触发检测 地震实时报警 STA LTA 波形仿真 数字测震仪 

分 类 号：P315.6[天文地球—地震学]