Detecting the Free Oscillations of The Earth in the Use of the Observed Data of
详细信息
- 责任者：Jiang Cuirong (Zhangjiakou Central Seismic Station ; Earthquake Administration of Hebei Province ; Zhangjiakou 075000 ; China) ; Ren Jia
- 刊名：Journal of Seismological Research
- 出版年：2010
- 卷期：33(4)
- 关键词：地球自由振动 ; Earth free oscillation ; 苏门答腊地震2004 ; Sumatra earthquake 2004 ; 辽宁 ; Liaoning Province
- 页码：p.313-317
- 图表：4 illus., 2 tables, 35 refs.
- 分类号：0500
- issnNo：ISSN1000-0666
- isbnNo：CN53-1062/P
摘要
In the first time of using digital observation data of Benxi artesian water temperature,as well as using direct calculation of power spectral density to extract the ball free oscillations prompted by the 9.0 Sumatra earthquake,and accurately detected 0S2～0S9 low-frequency base-type oscillations and two-frequency spherical harmonic oscillator:1S2, 1S3. By using the temperature observations, for the first time, the authors successfully extracted 3 mode split:0S2, 0S3, 0S4. Although only two single peaks were received by the three mode shapes,but the phenomenon of the Earth’s free oscillations spectrum of split testing provides a new and different types of observational data to the study of internal structure of the Earth.Studies have shown that digital observation data of Benxi artesian water temperature is indeed to extract the the ball free oscillations prompted by the 9.0 Sumatra earthquake which prompted a new observational tool for the Earth’s free oscillations study.