| DOI: | 10.1002/grl.50269
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| 论文题名: | Global propagation of body waves revealed by cross-correlation analysis of seismic hum |
| 作者: | Nishida K.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-9119
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| EISSN: | 1944-8850
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| 出版年: | 2013
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| 卷: | 40, 期:9 | | 起始页码: | 1691
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| 结束页码: | 1696
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| 语种: | 英语
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| 英文关键词: | body wave
; seismic hum
; seismic interferometry
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| Scopus关键词: | Body waves
; Cross-correlation analysis
; Earth's interior
; Earth's surface
; Global propagation
; Reflection phasis
; seismic hum
; Seismic interferometries
; Interferometry
; Seismology
; Surface waves
; Wave propagation
; Shear flow
; body wave
; Green function
; interferometry
; S-wave
; wave propagation
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| 英文摘要: | Seismic interferometry has now been applied to the exploration of the Earth's interior at scales ranging from local to global. Most studies have used surface-wave propagation. Recently, some studies have focused on body wave propagation on local and regional scales but not on a global scale. In this study, we succeed in extracting global body wave propagation(of P, PP, PKP, S, SS, ScS, P′P′, etc. waves) using seismic hum with frequency-wave number filtering in the range of 5 to 40 mHz. Although the observed body wave propagation is similar to that of the corresponding components of Green's functions, there are two differences between them: the lack of reflection phases in the observation and the dominance of shear-coupled PL waves in the observation. These differences originate from the dominance of shear-traction sources on the Earth's surface, which causes the breakdown of equipartition among modes with different radial orders. For further studies of body wave exploration by seismic interferometry, these differences should be considered. Key Points We succeed in extracting global body-wave propagation using seismic hum.SPL waves in the observation are more dominant than those in Green's functions.The dominance originates from their shear-traction sources on the seafloor. ©2013. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84879091793&doi=10.1002%2fgrl.50269&partnerID=40&md5=e99bf398a8dc7553b4950cb4c705c26e
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/6383
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| Appears in Collections: | 气候减缓与适应
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作者单位: | Earthquake Research Institute, University of Tokyo, 1-1-1 Yayoi 1, Bunkyo-ku, Tokyo 113-0032, Japan
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| Recommended Citation: | |
Nishida K.. Global propagation of body waves revealed by cross-correlation analysis of seismic hum[J]. Geophysical Research Letters,2013-01-01,40(9).
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