川南地区地震台网监测能力分析——以自贡地震台网为例  

Analysis of the Monitoring Capability of Seismic Network of South Sichuan Area:Taking Zigong Seismic Network as an Example

作　　者：梁坤 龙晓军 庞春梅 周玉毅 汤仁志 梁秀 LIANG Kun;LONG Xiaojun;PANG Chunmei;ZHOU Yuyi;TANG Renzhi;LIANG Xiu(Zigong Earthquake Monitoring Center Station of Sichuan Earthquake Agency,Sichuan Zigong 643000,China;Zigong Emergency Management Agency,Sichuan Zigong 643000,China)

机构地区：[1]四川省地震局自贡地震监测中心站,四川自贡643000 [2]自贡市应急管理局,四川自贡643000

出　　处：《四川地震》2023年第3期44-48,共5页Earthquake Research in Sichuan

基　　金：中国地震局地震监测、预报、科研三结合课题(3JH-202201033)资助.

摘　　要：利用台站背景噪声方法对自贡的地震监测能力进行计算,结果显示:2018-2019年自贡及邻区共13个地震台站,自贡地震监测能力达到M_(L)0.8;到2019年底又新增17个地震监测台站,自贡地震监测能力也随之提升到M_(L)0.4,其中自流井、贡井、大安和沿滩4个区的地震监测能力达到M_(L)0.2,荣县和富顺县局部地区的地震监测能力更是达到了M_(L)0.1。通过震级与频度关系计算实际监测地震数据的最小完整性震级,发现实际监测能力结果与理论计算结果基本一致,可为后续自贡及邻区架设地震监测台站、调整地震监测台站布局提供参考。The seismic monitoring capacity of Zigong was calculated by using the method of station background noise,and the results showed that the seismic monitoring capacity of 13 stations in Zigong and adjacent areas reached M_(L) 0.8 in 2018-2019;by the end of 2019,17 new seismic monitoring stations had been added,and the seismic monitoring capacity of Zigong had also increased to M_(L)0.4,of which the seismic monitoring capacity of the four districts of Artesian Well,Gongjing,Da’an and Yantan had reached M_(L)0.2,and the seismic monitoring capacity of Rong County and Fushun County had reached M_(L)0.1.The minimum integrity magnitude of the actual monitoring seismic data is calculated through the relationship between magnitude and frequency,and it is found that the actual monitoring capacity results are basically consistent with the theoretical calculation results,which can provide reference for the subsequent erection of seismic monitoring stations and adjustment of the layout of seismic monitoring stations in Zigong and adjacent areas..

关 键 词：地震监测能力 川南地区 背景噪声值 测震台网 

分 类 号：P315[天文地球—地震学]