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Attempt to detect combination tones between the Earth's free oscillation and the Earth tide,II -Bispectral Analysis-
https://doi.org/10.15094/00003017
https://doi.org/10.15094/000030176fee5b0e-c801-4889-af2d-bd071f6df291
名前 / ファイル | ライセンス | アクション |
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KJ00000044134 (879.7 kB)
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Item type | 紀要論文(ELS) / Departmental Bulletin Paper(1) | |||||
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公開日 | 1998-10-01 | |||||
タイトル | ||||||
タイトル | Attempt to detect combination tones between the Earth's free oscillation and the Earth tide,II -Bispectral Analysis- | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | nonlinear elasticity | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | the free oscillation | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | the earth tide | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | combination tone | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | bispectrum | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | departmental bulletin paper | |||||
ID登録 | ||||||
ID登録 | 10.15094/00003017 | |||||
ID登録タイプ | JaLC | |||||
ページ属性 | ||||||
内容記述タイプ | Other | |||||
内容記述 | P(論文) | |||||
著者名(英) |
Tanaka,Toshiyuki
× Tanaka,Toshiyuki× Furumoto,Muneyoshi |
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著者所属(英) | ||||||
言語 | en | |||||
値 | Faculty of Science, Kanazawa University/Faculty of Science, Kanazawa University | |||||
抄録(英) | ||||||
内容記述タイプ | Other | |||||
内容記述 | Two elastic oscillations at frequencies f_1 and f_2 in an elastically nonlinear material can produce combination tones at the sum (f_1+f_2) and the difference (f_1-f_2) frequencies. If the nonlinearity in the earth's interior is sufficiently large, such phenomena can be observed in the earth's oscillations. Analyzing long-period seismograms recorded by a superconducting gravimeter installed at Syowa Station in Antarctica, we try to detect the combination tones between the earth's tides and the spheroidal free oscillations. The method employed here is bispectral analysis. Since the bispectrum represents the coherency among three components with frequencies of f_1, f_2 and f_1+f_2, it is a powerful tool to analyze the combination tones. The results suggest that the spheroidal oscillations _0S_0 and _0S_5 modes probably interact with the ter-diurnal and diurnal tides, respectively. | |||||
雑誌書誌ID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA1130866X | |||||
書誌情報 |
Polar geoscience 巻 11, p. 42-48, 発行日 1998-10 |
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出版者 | ||||||
出版者 | National Institute of Polar Research |