| DOI: | 10.1002/2015GL064721
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| 论文题名: | T phase observations in global seismogram stacks |
| 作者: | Buehler J.S.; Shearer P.M.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-9335
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| EISSN: | 1944-9066
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| 出版年: | 2015
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| 卷: | 42, 期:16 | | 起始页码: | 6607
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| 结束页码: | 6613
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| 语种: | 英语
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| 英文关键词: | T phase
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| Scopus关键词: | Earthquakes
; Average filtering
; Broadband waveform
; Crustal velocity
; High frequency waves
; Higher frequencies
; Seismic networks
; Short time windows
; T-phase
; Seismology
; acoustics
; earthquake
; global perspective
; hydrophone
; seismogram
; stacking
; wave action
; waveform analysis
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| 英文摘要: | The T phase, conversion of acoustic to seismic energy, is typically observed as a high-frequency wave train at hydrophones or coastal seismic stations. Here we show that the T phase can be observed in broadband waveform stacks of ∼5200 earthquakes recorded by the Global Seismic Network. To enhance the phase arrivals in stacks, we apply short-time window average over long-time window average filtering to individual traces before stacking. Although the T phase arrival is visible in stacks from seismograms filtered at 0.5-5 Hz, it appears much stronger at higher frequencies (2-8 Hz) and is further enhanced by only stacking seismograms from oceanic paths. Stacking only subsets of the data depending on continental path lengths on the receiver side shows that the T phase can be observed at stations up to 4° inland from the coast, and changes in the T phase arrival time correspond to reasonable crustal velocities. © 2015. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84941741968&doi=10.1002%2f2015GL064721&partnerID=40&md5=94f2e66989bf9be0a57fb66a9cac13c2
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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/8950
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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: | Scripps Institution of Oceanography, University of California, San Diego, CA, United States
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| Recommended Citation: | |
Buehler J.S.,Shearer P.M.. T phase observations in global seismogram stacks[J]. Geophysical Research Letters,2015-01-01,42(16).
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