| DOI: | 10.1002/2015GL066390
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| 论文题名: | High-resolution probing of inner core structure with seismic interferometry |
| 作者: | Huang H.-H.; Lin F.-C.; Tsai V.C.; Koper K.D.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-8300
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| EISSN: | 1944-8031
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| 出版年: | 2015
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| 卷: | 42, 期:24 | | 起始页码: | 10622
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| 结束页码: | 10630
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| 语种: | 英语
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| 英文关键词: | core-mantle boundary
; earthquake coda
; hemisphere boundary
; inner core
; seismic interferometry
; USArray
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| Scopus关键词: | Geographical distribution
; Geophysics
; Interferometry
; Seismology
; Core-mantle boundary
; Hemisphere boundary
; Inner core
; Seismic interferometries
; USArray
; Earthquakes
; asymmetry
; body wave
; complexity
; core-mantle boundary
; crustal structure
; earthquake
; geophysical array
; inner core
; interferometry
; ray tracing
; seismicity
; spatial analysis
; spatial distribution
; spatial resolution
; travel time
; trend analysis
; wave propagation
; wavelength
; United States
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| 英文摘要: | Increasing complexity of Earth's inner core has been revealed in recent decades as the global distribution of seismic stations has improved. The uneven distribution of earthquakes, however, still causes a biased geographical sampling of the inner core. Recent developments in seismic interferometry, which allow for the retrieval of core-sensitive body waves propagating between two receivers, can significantly improve ray path coverage of the inner core. In this study, we apply such earthquake coda interferometry to 1846 USArray stations deployed across the U.S. from 2004 through 2013. Clear inner core phases PKIKP2 and PKIIKP2 are observed across the entire array. Spatial analysis of the differential travel time residuals between the two phases reveals significant short-wavelength variation and implies the existence of strong structural variability in the deep Earth. A linear N-S trending anomaly across the middle of the U.S. may reflect an asymmetric quasi-hemispherical structure deep within the inner core with boundaries of 99°W and 88°E. © 2015. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84955210062&doi=10.1002%2f2015GL066390&partnerID=40&md5=1f2a816bfa2abd2f9a834b0bd9fff31a
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| Citation statistics: |
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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/7916
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| Appears in Collections: | 科学计划与规划
气候变化与战略
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作者单位: | Department of Geology and Geophysics, University of Utah, Salt Lake City, UT, United States
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| Recommended Citation: | |
Huang H.-H.,Lin F.-C.,Tsai V.C.,et al. High-resolution probing of inner core structure with seismic interferometry[J]. Geophysical Research Letters,2015-01-01,42(24).
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