| DOI: | 10.1002/2015GL065108
|
| 论文题名: | The lack of equipartitioning in global body wave coda |
| 作者: | Sens-Schönfelder C.; Snieder R.; Stähler S.C.
|
| 刊名: | Geophysical Research Letters
|
| ISSN: | 0094-9551
|
| EISSN: | 1944-9282
|
| 出版年: | 2015
|
| 卷: | 42, 期:18 | | 起始页码: | 7483
|
| 结束页码: | 7489
|
| 语种: | 英语
|
| 英文关键词: | body wave
; coda
; equipartition
; scattering
; seismic interferometry
; seismology
|
| Scopus关键词: | Geophysics
; Interferometry
; Scattering
; Seismology
; Ambient seismic noise
; Body waves
; coda
; Equipartition
; Large earthquakes
; Seismic interferometries
; Teleseismic body waves
; Teleseismic distances
; Earthquakes
; body wave
; coda
; earthquake
; scattering
; seismic noise
; seismology
; teleseismic wave
; wave propagation
|
| 英文摘要: | Correlation of the coda of large earthquakes can be used to retrieve body waves at teleseismic distances. This retrieval depends on waves propagating with equal energy in all directions (equipartitioning). We carry out a beamforming analysis of body waves at periods of 10 and 40 s recorded at USArray and show that the late coda, up to 10 h after the Okhotsk earthquake, is dominated by waves propagating in the great circle direction; late coda waves are not equipartitioned. This implies for seismic interferometry that teleseismic body waves can only be extracted from the coda when the earthquake and the receivers are located on a great circle. This happens automatically when the employed stations are antipodal or when the autocorrelation of waves is used. The use of long-period ambient seismic noise relies on the distribution of sources because scattering only marginally randomizes directions. This provides insight into recent observations of core phases extracted from seismic interferometry. © 2015 American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84945196059&doi=10.1002%2f2015GL065108&partnerID=40&md5=87f86d08abd199888ef1c31e4125057e
|
| Citation statistics: |
|
| 资源类型: | 期刊论文
|
| 标识符: | http://119.78.100.158/handle/2HF3EXSE/9166
|
| Appears in Collections: | 科学计划与规划
气候变化与战略
|
|
There are no files associated with this item.
|
|
作者单位: | GFZ German Research Centre for Geosciences, Potsdam, Germany
|
| Recommended Citation: | |
Sens-Schönfelder C.,Snieder R.,Stähler S.C.. The lack of equipartitioning in global body wave coda[J]. Geophysical Research Letters,2015-01-01,42(18).
|
|
|