CAJ | 학술논문

利用中国数字地震台网（CDSN）5个台站的波形资料,采用功率谱密度估计方法,提取了智利地震激发的地球球型自由振荡,并与地球初步参考模型（PREM）的理论自由振荡周期进行对比,发现球型振荡振型周期与地球初步参考模型预测的球型自由振荡周期基本吻合。所得结果可以进一步用来研究地震震源机制和地球内部结构,并对大地震的震源破裂分布给出一定的约束。
이용중국수자지진태망（CDSN）5개태참적파형자료,채용공솔보밀도고계방법,제취료지리지진격발적지구구형자유진탕,병여지구초보삼고모형（PREM）적이론자유진탕주기진행대비,발현구형진탕진형주기여지구초보삼고모형예측적구형자유진탕주기기본문합。소득결과가이진일보용래연구지진진원궤제화지구내부결구,병대대지진적진원파렬분포급출일정적약속。
Based on waveform data recorded by 5 stations of China Digital Seismic Network（CDSN）,using the power spectral density（PSD） estimation method,we extracted spheroidal mode of the earth free oscillation excited by the Chile earthquake.They are consistent and nearly same with the frequencies of the modes of Preliminary Reference Earth Model（PREM）.The results can be further used to study the focal mechanism and the Earth＇s interior structure,and give certain constraints on the big earthquake rupture distribution.