IDA和CDSN资料的长周期面波研究  

Research of VLP surface waves in IDA and CDSN data

作　　者：郝建国 潘怀文[2] 

机构地区：[1]北京地震基准台,中国北京100095 [2]国家地震局科技司监测处,中国北京100036

出　　处：《地震地磁观测与研究》1993年第6期28-35,共8页Seismological and Geomagnetic Observation and Research

基　　金：地震科学联合基金会

摘　　要：1980年和1982年分别在昆明和北京自家疃台架设了IDA观测仪器,1985年开始又陆续在北京、兰州、海拉尔等地布设和完善了CDSN数字化地震观测台网,为开展长周期面波研究提供了方便。本文结合国内外研究现状,论述了超长周期地震观测在地球自由振荡、震源物理面波理论地震图合成及非均匀地球介质结构研究中的应用。同时结合1989年5月6日发生在秘鲁的M_s7.0地震,介绍了利用简正振型资料开展地震矩张量反演及面波理论地震图合成研究的方法。阐述了地球自由振荡各种振型固有频率峰值分裂及振型间偶合现象在非均匀地球构造研究中的意义。IDA(International Deployment Accelerometer) observation instruments were set up in 1980 and 1982 at Kunming and Beijing Station respectively, and since 1985, CDSN(Chinese Digital Seismic Network) has been deployed and improved at Seismic Stations of Beijing, Lanzhou, Hailaer etc, one after another. This provides convenience for studying very long period (VLP) surface wave s. The application of VLP seismic observation data in study of earth free-oscillation, source mechanism, surface waves synthetic seismograms and the heterogeneous medium structure of the earth are discussed in this paper by combining the studying status at home and abroad. At the same time, the paper also introduces the methods for inversion of moment tensor and surface wave's synthetic seismograms using normal-mode of oscillation excited by peru M_s 7.0 earthquake of may sixth 1989, and relates the significance of the peak value splitting of eigen frequencies of various earth freeoscillation modes and coupling phonomena of the modes in the research of transversal heterogeneous structure of the earth.

关 键 词：自由振荡 地震观测 地震波 震源 

分 类 号：P315.3[天文地球—地震学]