DOI: 10.1002/2016GL071310
论文题名: Optimal time alignment of tide-gauge tsunami waveforms in nonlinear inversions: Application to the 2015 Illapel (Chile) earthquake
作者: Romano F. ; Piatanesi A. ; Lorito S. ; Tolomei C. ; Atzori S. ; Murphy S.
刊名: Geophysical Research Letters
ISSN: 0094-8448
EISSN: 1944-8179
出版年: 2016
卷: 43, 期: 21 起始页码: 11226
结束页码: 11235
语种: 英语
英文关键词: inversion
; optimal time alignment
; subduction earthquakes
; tsunami
Scopus关键词: Alignment
; Cost functions
; Earthquakes
; Gages
; Geophysics
; Synthetic aperture radar
; Tsunamis
; Waveform analysis
; Interferometric synthetic aperture radars
; inversion
; Non linear inversion
; Optimal time
; Slip distribution
; Subduction earthquakes
; Waveform inversion
; Waveform modeling
; Tide gages
英文摘要: Tsunami waveform inversion is often used to retrieve information about the causative seismic tsunami source. Tide gauges record tsunamis routinely; however, compared to deep-ocean sensor data, tide-gauge waveform modeling is more difficult due to coarse/inaccurate local bathymetric models resulting in a time mismatch between observed and predicted waveforms. This can affect the retrieved tsunami source model, thus limiting the use of tide-gauge data. A method for nonlinear inversion with an automatic optimal time alignment (OTA), calculated by including a time shift parameter in the cost function, is presented. The effectiveness of the method is demonstrated through a series of synthetic tests and is applied as part of a joint inversion with interferometric synthetic aperture radar data for the slip distribution of the 2015 Mw 8.3 Illapel earthquake. The results show that without OTA, the resolution on the slip model degrades significantly and that using this method for a real case strongly affects the retrieved slip pattern. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84998813205&doi=10.1002%2f2016GL071310&partnerID=40&md5=b23d324cd9a68f467f9a09f610b05763
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9411
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: Istituto Nazionale di Geofisica e Vulcanologia, Rome, Italy
Recommended Citation:
Romano F.,Piatanesi A.,Lorito S.,et al. Optimal time alignment of tide-gauge tsunami waveforms in nonlinear inversions: Application to the 2015 Illapel (Chile) earthquake[J]. Geophysical Research Letters,2016-01-01,43(21).