区域数字地震台网面波震级M_S测定与系统误差分析

英文篇名：Determination of surface wave magnitude M_S and systematic error analysis for regional digital seismic network
中文刊名：地震地磁观测与研究
英文刊名：Seismological and Geomagnetic Observation and Research
作者：傅再扬 ; 吴绍祖 ; 郑永通 ; 杨贵
英文作者：Fu Zaiyang ; Wu Shaozu ; Zheng Yongtong and Yang Gui(Earthquake Administration of Fujian Province ; Fuzhou 650041 ; China)
中文关键词：数字台网 ; 地震 ; 面波震级 ; 误差分析
英文关键词：digital network ; earthquake ; surface wave magnitude ; error analysis
出版日期：2004-12-25
机构：福建省地震局,福建省地震局,福建省地震局,福建省地震局中国福州350003 ,中国福州350003 ,中国福州350003 ,中国福州350003
年：2004
期：06
出版单位：地震地磁观测与研究

摘要

以国家地震台网测定的面波震级为标准,利用福建区域数字地震台网测定的近距离面波震级MS结果与国家地震台网测定的面波震级结果进行比较和统计分析。根据两者之间的相对差量,主要从数据采集器的最大动态放大倍数分贝数、FBS3宽频带反馈式速度平坦型地震计的幅频特性和测定面波震级展开公式推导3方面进行分析。结果表明震中距Δ、数据采集器的动态范围和地震计记录地面运动振动频率的有效频带宽度是影响面波震级测定的主要因素,进而提出适合于福建区域台网测定近距离面波震级MS的台基校正值及标准偏差。
We take the surface wave magnitude M S measured by the state seismic network as the standard.The comparison and statistical analysis between Fujian regional digital seismic network and state seismic network for M S had been made.The analysis is from three aspects:the dynamic magnification of data acquisition,amplitude frequency characteristics of FBS 3 wide frequency feedback speed seismograph and the expression of surface wave magnitude M S.The results indicate that the epicenter distance Δ and the dynamical range of data acquisition device and the frequency width of seismograph are the main factor to influence surface wave magnitude.The station correction and rms error to measure near distance surface wave magnitude M S have been obtained which meet Fujian regional digital seismic network.

引文

陈祥熊,陈文明,傅再扬等.2000.区域地震台网ML 震级系统连统过渡问题[J].地震,20(增刊)
    胡广书.1997.数字信号处理——理论、算法与实现[M].北京:清华大学出版社
    刘瑞丰,党京平,陈培善.1996.利用速度型数字地震仪记录测定面波震级[J].地震地磁观则与研究,17(2)
    GutenbergB .1945.AmplitudesofSurfacewavesandmagnitudesofshallowearthquakes[J].BullseismSocAmer,35,3～12
    GutenbergGutenbergB .1945.AmplitudesofP ,PPandSandmagnitudesofshallowearthquakes[J].BullseismSocAmer,35,57～69
    GutenbergB .1945.Magnitudedeterminationfordeep focusearthquakes[M].BullSeismSocAmer,35,117～130
    RichterCF .1935.AninstrumentalearthquakemagnitudeScale[J].BullSeisSocAmer,25,1～32