湖北黄梅宽频带形变观测仪与地震计数据融合分析  

Data fusion analysis of broadband deformation observation meters and seismometers in Huangmei,Hubei Province

作　　者：李小芬 蒋玲霞[1,2] 印苏文 Li Xiaofen;Jiang Lingxia;Yin Suwen(Institute of Seismology,China Earthquake Administration,Hubei Wuhan 430071,China;Hubei Earthquake Agency,Hubei Wuhan 430071,China)

机构地区：[1]中国地震局地震研究所,湖北武汉430071 [2]湖北省地震局,湖北武汉430071

出　　处：《地震科学进展》2024年第12期840-850,共11页Progress in Earthquake Sciences

基　　金：中国地震局地震研究所所长基金(IS202236329)资助。

摘　　要：本文分析对比了湖北黄梅地震监测站宽频带地倾斜仪、地应变仪和地震计观测的同震响应的频谱和震相特征,结果表明两类定点形变仪对地震波具有高度灵敏性,并且相较于倾斜仪,应变仪的频谱更贴近于地震计。因此尝试利用应变地震波确定地震震级,从而收集了2021—2024年全球震级M≥5.0具有同震响应的共计372次有效地震,并基于中国地震台网中心发布的地震目录,用最小二乘法得到了应变震级公式。In this paper,we comparatively analyze the spectrum and phase characteristics of coseismic response recorded by broadband tiltmeter,strainmeters,and seismometer at the Hubei Huangmei seismic station.The results show that two types of fixed-point deformation meters are highly sensitive to seismic waves.Compared to tiltmeter,the spectrum of strainmeter is more similar to that of seismometer.Therefore,this article attempts to determine earthquake magnitudes using strain seismic waves.A total of 372 effective earthquakes with coseismic responses and magnitude M≥5.0 from 2021—2024 are collected.Based on the earthquake catalogue published by the China Earthquake Networks Center,a strain magnitude formula is obtained using the least square method.

关 键 词：宽频带地倾斜仪 地应变仪 地震计 频谱 震相 应变震级 

分 类 号：P315[天文地球—地震学]