DOI: 10.1002/2016GL071425
论文题名: T-phase and tsunami pressure waveforms recorded by near-source IMS water-column hydrophone triplets during the 2015 Chile earthquake
作者: Matsumoto H. ; Haralabus G. ; Zampolli M. ; Özel N.M.
刊名: Geophysical Research Letters
ISSN: 0094-8291
EISSN: 1944-8022
出版年: 2016
卷: 43, 期: 24 起始页码: 12511
结束页码: 12519
语种: 英语
英文关键词: hydrophone
; International Monitoring System
; T phase
; tsunami
Scopus关键词: Frequency standards
; Geophysics
; Gravity waves
; Hydrophones
; Monitoring
; Tsunamis
; Underwater acoustics
; Comprehensive Nuclear-Test-Ban Treaty
; International monitoring systems
; Pre-processing step
; Preprocessing techniques
; Standard frequency waves
; Surface gravity waves
; T-phase
; Underwater acoustic signal
; Earthquakes
英文摘要: Underwater acoustic signal waveforms recorded during the 2015 Chile earthquake (Mw 8.3) by the hydrophones of hydroacoustic station HA03, located at the Juan Fernandez Islands, are analyzed. HA03 is part of the Comprehensive Nuclear-Test-Ban Treaty International Monitoring System. The interest in the particular data set stems from the fact that HA03 is located only approximately 700 km SW from the epicenter of the earthquake. This makes it possible to study aspects of the signal associated with the tsunamigenic earthquake, which would be more difficult to detect had the hydrophones been located far from the source. The analysis shows that the direction of arrival of the T phase can be estimated by means of a three-step preprocessing technique which circumvents spatial aliasing caused by the hydrophone spacing, the latter being large compared to the wavelength. Following this preprocessing step, standard frequency-wave number analysis (F-K analysis) can accurately estimate back azimuth and slowness of T-phase signals. The data analysis also shows that the dispersive tsunami signals can be identified by the water-column hydrophones at the time when the tsunami surface gravity wave reaches the station. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85007378494&doi=10.1002%2f2016GL071425&partnerID=40&md5=3a7a94af86741851f33ac65d988b5462
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9254
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: International Monitoring System Division, Comprehensive Nuclear-Test-Ban Treaty Organization, Vienna, Austria
Recommended Citation:
Matsumoto H.,Haralabus G.,Zampolli M.,et al. T-phase and tsunami pressure waveforms recorded by near-source IMS water-column hydrophone triplets during the 2015 Chile earthquake[J]. Geophysical Research Letters,2016-01-01,43(24).