Wavelet filter analysis of atmospheric pressure effects in the long-period seismic mode band
文献类型：期刊论文
| 作者 | Hu, XG; Liu, LT; Hinderer, J; Hsu, HT; Sun, HP |
| 刊名 | Physics of the earth and planetary interiors
 |
| 出版日期 | 2006-01-16 |
| 卷号 | 154期号:1页码:70-84 |
| 关键词 | Wavelet filter Pressure correction Free oscillations Superconducting gravimeter |
| ISSN号 | 0031-9201 |
| DOI | 10.1016/j.pepi.2005.09.003 |
| 通讯作者 | Hu, xg(hxg432@sohu.com) |
| 英文摘要 | The importance of the reduction of atmospheric pressure effects becomes very clear when investigating seismic normal-mode spectra below 1.5 mhz. the usual simple correction method consists in subtracting a term converted from local atmospheric pressure (pressure multiplied by a frequency-independent admittance) from the gravity record in time domain. thus, estimating an efficient admittance is the key for an improved correction. band-pass filters derived from dyadic orthogonal wavelet transform, having narrow pass-bands with good frequency response but without gibbs phenomenon and causing no phase tag, are very helpful to estimate an efficient admittance, which is both time and frequency-dependent. processing of high quality superconducting gravimeter (sg) records for the great sumatra earthquake (mw = 9.3, dec 26, 2004) with wavelet filters reveal the three very well resolved splitting singlets of overtone s-2(1) with a single gravity record after correction with time-dependent and frequency-dependent admittances. we also observe all coupled toroidal modes below 1.5 mhz, except t-0(5), t-0(7) and t-1(1), with good signal-to-noise ratio (snr); moreover, toroidal modes t-1(2) and t-1(3) are for the first time unambiguously revealed in vertical components. (c) 2005 elsevier b.v. all rights reserved. |
| WOS关键词 | SUPERCONDUCTING GRAVIMETERS ; BAROMETRIC-PRESSURE ; FREE OSCILLATIONS ; INNER-CORE ; GRAVITY ; EARTH ; MHZ ; FREQUENCIES ; WOBBLE |
| WOS研究方向 | Geochemistry & Geophysics |
| WOS类目 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000235493300005 |
| 出版者 | ELSEVIER SCIENCE BV |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2379939 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Hu, XG |
| 作者单位 | 1.Chinese Acad Sci, Inst Geodesy & Geophys, Wuhan, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing, Peoples R China 3.ULP, UMR 7516 CNRS, Inst Phys Globe Strasbourg, F-67084 Strasbourg, France |
| 推荐引用方式 GB/T 7714 | Hu, XG,Liu, LT,Hinderer, J,et al. Wavelet filter analysis of atmospheric pressure effects in the long-period seismic mode band[J]. Physics of the earth and planetary interiors,2006,154(1):70-84. |
| APA | Hu, XG,Liu, LT,Hinderer, J,Hsu, HT,&Sun, HP.(2006).Wavelet filter analysis of atmospheric pressure effects in the long-period seismic mode band.Physics of the earth and planetary interiors,154(1),70-84. |
| MLA | Hu, XG,et al."Wavelet filter analysis of atmospheric pressure effects in the long-period seismic mode band".Physics of the earth and planetary interiors 154.1(2006):70-84. |
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来源：中国科学院大学
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