中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Observation of the seismic anisotropy effects on free oscillations below 4 mHz

文献类型:期刊论文

作者Hu, X. G. ; Liu, L. T. ; Kroner, C. ; Sun, H. P.
刊名Journal of Geophysical Research-Solid Earth
出版日期2009
中文摘要We present observations of significant fundamental spheroidal-toroidal mode coupling at frequencies below 4 mHz in the early part of vertical component records from seismic stations on near-equatorial source-receiver propagation paths after the 26 December 2004 and 28 March 2005 great Sumatra earthquakes. Since the mixed-type coupling induced by rotational Coriolis force are very weak at these selected equatorial-path stations, we investigate what effects mimic the strong Coriolis effects at frequencies below 4 mHz, suggesting that local azimuthal anisotropy in the upper mantle is the most likely explanation for the strong anomalous coupling we observed. In addition, strong anisotropy coupling observed in the frequency band of 1-4 mHz is always characterized by anomalous small amplitudes of coupled spheroidal modes on the vertical component of seismograph, suggesting that excitation of quasi-toroidal modes by azimuthal anisotropy associates with geometric nodes of fundamental spheroidal modes.
原文出处://WOS:000267644800001
公开日期2012-04-11
源URL[http://ir.whigg.ac.cn/handle/342008/3081]  
专题测量与地球物理研究所_其他_期刊论文
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GB/T 7714
Hu, X. G.,Liu, L. T.,Kroner, C.,et al. Observation of the seismic anisotropy effects on free oscillations below 4 mHz[J]. Journal of Geophysical Research-Solid Earth,2009.
APA Hu, X. G.,Liu, L. T.,Kroner, C.,&Sun, H. P..(2009).Observation of the seismic anisotropy effects on free oscillations below 4 mHz.Journal of Geophysical Research-Solid Earth.
MLA Hu, X. G.,et al."Observation of the seismic anisotropy effects on free oscillations below 4 mHz".Journal of Geophysical Research-Solid Earth (2009).

入库方式: OAI收割

来源:测量与地球物理研究所

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