气候变化领域集成服务门户(CCPortal): Broadband wavelength slip model of the 1906 Ecuador-Colombia megathrust-earthquake based on seismic intensity and tsunami data

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DOI	10.1016/j.tecto.2019.228226
	Broadband wavelength slip model of the 1906 Ecuador-Colombia megathrust-earthquake based on seismic intensity and tsunami data
	Pulido N.; Yoshimoto M.; Sarabia A.M.
发表日期	2020
ISSN	00401951
卷号	774
英文摘要	The 1906/01/31 Ecuador-Colombia earthquake (Mw8.4–8.6), is one of the largest megathrust earthquakes that have occurred at the interface of the Nazca and South-American plates. Recently the source process of the earthquake has been re-examined using historical tsunami waveforms, yielding a slip distribution mainly near to the trench, and a smaller moment magnitude than previous estimations. Previous studies have shown that tsunami data can sufficiently constrain the long wavelength characteristics of slip during an earthquake. However to fully understand strong ground motion generation process during earthquakes in a broadband frequency range, the study of shorter wavelength slip, responsible for high frequency ground motion generation, is also necessary. In this study we use the tsunami-slip model of the 1906 earthquake, as well as comprehensive macro-seismic intensity estimations of the earthquake, to elaborate a broadband-wavelength (BB) source model appropriate for the generation of broadband frequency strong ground motions as well as tsunami modeling. Our results show that a BB slip model of the earthquake is able to satisfactorily reproduce observed intensity values as well as tsunami waveforms. Our BB slip model implies an increase in total moment magnitude to a value up to 8.6 respect to the estimation from tsunami data, which represent the contribution of short wavelength slips to seismic radiation. The methodology developed in this study is suitable to study the generation process of high frequency ground motions during large earthquakes. © 2019 The Author(s)
关键词	1906 Ecuador Colombia earthquake Source model Strong motion Tsunami
英文关键词	Capillary flow; Earthquake effects; Frequency estimation; Broadband frequency; Colombia; Generation process; Megathrust earthquakes; Shorter wavelength; Source modeling; Strong ground motion; Strong motion; Tsunamis; broadband data; earthquake event; earthquake intensity; seismic source; strong motion; tsunami; wavelength; Colombia; Ecuador
语种	英语
来源期刊	Tectonophysics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/207854
作者单位	National Research for Earth Science and Disaster Resilience, Japan; Nagoya University, Japan; Servicio Geológico Colombiano, Colombia
推荐引用方式 GB/T 7714	Pulido N.,Yoshimoto M.,Sarabia A.M.. Broadband wavelength slip model of the 1906 Ecuador-Colombia megathrust-earthquake based on seismic intensity and tsunami data[J],2020,774.
APA	Pulido N.,Yoshimoto M.,&Sarabia A.M..(2020).Broadband wavelength slip model of the 1906 Ecuador-Colombia megathrust-earthquake based on seismic intensity and tsunami data.Tectonophysics,774.
MLA	Pulido N.,et al."Broadband wavelength slip model of the 1906 Ecuador-Colombia megathrust-earthquake based on seismic intensity and tsunami data".Tectonophysics 774(2020).