赤峰中心地震台地面与井下地震观测系统监测能力对比分析  

Comparative analysis of monitoring capacities of the ground and underground observation systems at Chifeng Center Seismic Station

作　　者：郭延杰 于章棣 齐彬彬 屈楠 范东海 黄瑞滨 刘继伟 GUO Yanjie;YU Zhangdi;QI Binbin;QU Nan;FAN Donghai;HUANG Ruibin;LIU Jiwei(Chifeng Central Seismic Station of Inner Mongolia Autonomous Region,Inner Mongolia Autonomous Region 024000,China)

机构地区：[1]内蒙古自治区赤峰中心地震台,中国内蒙古自治区024000

出　　处：《地震地磁观测与研究》2020年第4期100-104,共5页Seismological and Geomagnetic Observation and Research

基　　金：内蒙古自治区地震局局长基金(项目编号:2019JC16)。

摘　　要：为分析总结地面与井下地震观测系统的特点,以赤峰中心地震台地面与井下观测系统为研究对象,在噪声分析、噪声功率谱分析、地震监测能力和观测动态范围等方面进行分析。结果表明,2套观测系统的RMS均可达到Ⅱ级环境地噪声水平,井下观测系统噪声小于地面观测系统。对2套观测系统的功率谱密度、有效动态范围的对比均表明,井下观测系统的动态范围比地面观测系统超出约10%,因此,井下观测系统地震监测能力优于地面观测系统,井下观测系统能更有效地记录观测数据。In order to analyze and summarize characteristics of ground and underground seismic observation systems,this paper takes ground and underground seismic observation systems at Chifeng Center Seismic Station as a research object to carry out noise analysis,noise power spectrum analysis,earthquake-monitoring capability and observation dynamic range analysis and comparison.The results show that the RMSs of both observation systems can achieve the level of environmental ground noise levelⅡ,and the noise level of the underground observation system is lower than that of the ground observation system.The comparison of power spectrum density and effective dynamic range of the two observation systems show that the dynamic range of the underground observation system is about 10%larger than that of the ground observation system,showing that the earthquake-monitoring capability of the underground observation system is better than that of the ground observation system,so the underground seismic observation system can record the observation data more effectively.

关 键 词：地震观测系统 噪声分析 噪声功率谱分析 地震监测能力 有效动态范围 

分 类 号：P315.7[天文地球—地震学]