IDA和CDSN资料的长周期面波研究

１９８０年和１９９２年分别在昆明和北京白家疃台架设了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Ｍｓ７．０地震，介绍了利用简正振型资料开发地震矩张量反演

Research of VLP surface waves in IDA and CDSN data

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.