VP宽频带倾斜仪与宽频带地震仪数据对比分析  

Data Comparative Analysis of VP Broadband Tiltmeter and Broadband Seismometer

作　　者：纪春玲 董博[1,2] 马广庆 王时[1,2] 章阳 王莹楷[3] JI Chunling;DONG Bo;MA Guangqing;WANG Shi;ZHANG Yang;WANG Yingkai(Hebei Hongshan National Observatory on Thick Sediments and Seismic Hazards,Xingtai Longyao,054000;Seismological Bureau of Hebei Province,262 Huaizhong Road,Shijiazhuang,050021;Xinle Emergency Management Bureau,19 Changshou Road,Xinle,050700)

机构地区：[1]河北红山巨厚沉积与地震灾害国家野外科学观测研究站,河北邢台054000 [2]河北省地震局,石家庄050021 [3]新乐市应急管理局,河北新乐050700

出　　处：《华北地震科学》2023年第1期53-58,共6页North China Earthquake Sciences

基　　金：河北省重点研发计划项目(21375411D)。

摘　　要：采用傅里叶变换方法通过对易县地震台VP宽频带倾斜仪与同址宽频带地震仪数据、怀来东良地震台VP宽频带倾斜仪与距离10 km的沙城地震台宽频带地震仪数据对比分析得到:①时间序列:VP宽频带倾斜仪NS向、EW向同震波形与宽频带地震仪NS向、EW向地震波基本吻合,曲线具有较高的一致性。②频谱特征:当P波到达时,2套仪器记录到的高频信号瞬间增多,振幅较小,地震能量强度较小,频带较宽,随着S波的到达,地震能量强度迅速增强,振幅迅速增大,振幅达到最大值后随着地震能量的衰减而减小,响应频带逐渐变窄。③震级、震源深度相同,随着震中距的变化,VP宽频带倾斜仪记录到的同震振幅变化幅度比宽频带地震仪要大。Through the comparative analysis of the data of VP broadband tiltmeter and broadband seismometer at the same site at Yixian seismic station,VP broadband tiltmeter at Huailai Dongliang seismic station and broadband seismometer at Shacheng seismic station with a distance of 10km,we can get:1.Time series:the NS and EW coseismic waveforms of VP broadband tiltmeter are basically consistent with the NS and EW seismic waves of broadband seismometer,and the curves have high consistency.The coseismic waveforms of the two sets of instruments can clearly distinguish P wave and S wave.2.Spectrum characteristics:when the P-wave arrives,the high-frequency signals recorded by the two sets of instruments increase instantaneously,with small amplitude,small seismic energy intensity.With the arrival of S-wave,the amplitude increases instantaneously,and increases rapidly with the rapid increase of seismic energy intensity.After the amplitude reaches the maximum value,it decreases with the attenuation of seismic energy,and the response frequency band gradually narrows.3.If the magnitude and focal depth are the same,with the change of epicentral distance,the variation amplitude of coseismic amplitude recorded by VP broadband tiltmeter is larger than that recorded by broadband seismometer.

关 键 词：VP宽频带倾斜仪 宽频带地震仪 频谱特征 

分 类 号：P315.62[天文地球—地震学]