天津测震台网地震监测能力分析  

Evaluation of monitoring capability of Tianjin Seismic Network

作　　者：许可[1] 柳艳丽[1] 高也[1] 李晔[1] 刘瑞瑞[1] 孔繁旭[1] 

机构地区：[1]天津市地震局,中国天津300201

出　　处：《地震地磁观测与研究》2017年第4期194-198,共5页Seismological and Geomagnetic Observation and Research

基　　金：中国地震局测震台网青年骨干培养专项(项目编号:20150401);天津简易烈度计地震预警试验区建设项目(项目编号:2015DZLDY002)

摘　　要：通过计算地震台站最小监控震级,得到天津测震台网地震监测能力。采用经典谱估计中的Welch算法,计算天津测震台网31个地震台站噪声水平。取噪声水平有效值的30倍作为能检测到最小地震S波的最大振幅,通过近震震级公式,计算各台站地震震级,取第4个能被检测到的台站地震震级作为最小监控震级。In this paper, we obtained the monitoring ability of Tianjin Seismic Network by calculating the minimum magnitude the stations monitored. Firstly, using Welch algorithm, a classic spectrum estimation, we calculated the noise level of 31 stations of Tianjin Seismic Network. Take 30 times valid values of the noise level as the maximum amplitude of S wave of the minimum seismic event that monitored. Then calumniated the seismic magnitude of each station using local magnitude formula, and took the fourth seismic magnitude of the station detected as the minimum monitoring magnitude.

关 键 词：测震台网 噪声水平 监测能力 Welch算法 

分 类 号：P315.78[天文地球—地震学]