| DOI: | 10.1002/grl.50237
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| 论文题名: | Extracting seismic core phases with array interferometry |
| 作者: | Lin F.-C.; Tsai V.C.; Schmandt B.; Duputel Z.; Zhan Z.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-9243
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| EISSN: | 1944-8974
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| 出版年: | 2013
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| 卷: | 40, 期:6 | | 起始页码: | 1049
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| 结束页码: | 1053
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| 语种: | 英语
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| 英文关键词: | Body waves
; Core phases
; cross-correlation
; Seismic interferometry
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| Scopus关键词: | Body waves
; Core phases
; Cross correlations
; Remote regions
; Seismic interferometries
; Spatial sampling
; Temporal correlations
; Temporal variation
; Interferometry
; Earthquakes
; array
; body wave
; inner core
; interferometry
; outer core
; seismic method
; seismic wave
; seismicity
; seismograph
; spatiotemporal analysis
; temporal variation
; New Zealand
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| 英文摘要: | Seismic body waves that sample Earth's core are indispensable for studying the most remote regions of the planet. Traditional core phase studies rely on well-defined earthquake signals, which are spatially and temporally limited. We show that, by stacking ambient-noise cross-correlations between USArray seismometers, body wave phases reflected off the outer core (ScS), and twice refracted through the inner core (PKIKP2) can be clearly extracted. Temporal correlation between the amplitude of these core phases and global seismicity suggests that the signals originate from distant earthquakes and emerge due to array interferometry. Similar results from a seismic array in New Zealand demonstrate that our approach is applicable in other regions and with fewer station pairs. Extraction of core phases by interferometry can significantly improve the spatial sampling of the deep Earth because the technique can be applied anywhere broadband seismic arrays exist. Key Points Deep propagating seismic body waves can be extracted using array interferometry Core phases ScS and PKIKP2 propagating between stations can be clearly observed Temporal variation study indicates the signals are earthquake coda related. ©2013 American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84876936858&doi=10.1002%2fgrl.50237&partnerID=40&md5=d2243f67ca975d29f73779837f119b58
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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/6507
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| Appears in Collections: | 气候减缓与适应
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作者单位: | Seismological Laboratory, Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125, United States
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| Recommended Citation: | |
Lin F.-C.,Tsai V.C.,Schmandt B.,et al. Extracting seismic core phases with array interferometry[J]. Geophysical Research Letters,2013-01-01,40(6).
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