气候变化领域集成服务门户(CCPortal): Toward a Universal Frequency of Occurrence Distribution for Tsunamis: Statistical Analysis of a 32-Year Bottom Pressure Record at Axial Seamount

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DOI	10.1029/2020GL087372
	Toward a Universal Frequency of Occurrence Distribution for Tsunamis: Statistical Analysis of a 32-Year Bottom Pressure Record at Axial Seamount
	Fine I.V.; Thomson R.E.; Chadwick W.W.; Jr.; Fox C.G.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:10
英文摘要	Detailed examination of a 32-year record of high-resolution bottom pressure measurements at Axial Seamount (and vicinity) in the northeast Pacific identified a total of 41 tsunamis between 1986 and 2018. All of the events were associated with tsunamigenic earthquakes with magnitudes of 7.0 and greater. Statistical analysis of the data reveals that the time series of maximum tsunami amplitude and root-mean-square (RMS) tsunami amplitude follow strict power-law distributions, with considerably less deviation than for coastal tide gauge records. The high statistical reliability of the seamount record is attributable to the long duration of the observations and to the low signal-to-noise ratio of digital open-ocean bottom pressure records. The power law for the RMS tsunami amplitude is especially stable and follows a pure Pareto distribution (with exponent, β = 1.24) even when the minimum threshold is increased to the point that only a few events remain in the time series. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Pareto principle; Signal to noise ratio; Submarine geology; Tide gages; Time series; Tsunamis; Bottom pressures; Coastal tide-gauge records; High resolution; Low signal-to-noise ratio; Pareto distributions; Power law distribution; Root Mean Square; Statistical reliability; Time series analysis; amplitude; bottom pressure; earthquake magnitude; measurement method; power law; seamount; signal-to-noise ratio; tide gauge; time series analysis; tsunami; Pacific Ocean
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170365
作者单位	Fisheries and Oceans Canada, Institute of Ocean Sciences, Sidney, BC, Canada; Oregon State University, Cooperative Institute for Marine Resources Studies (CIMRS), Newport, OR, United States; National Oceanic and Atmospheric Administration, Pacific Marine Environmental Laboratory, Newport, OR, United States
推荐引用方式 GB/T 7714	Fine I.V.,Thomson R.E.,Chadwick W.W.,et al. Toward a Universal Frequency of Occurrence Distribution for Tsunamis: Statistical Analysis of a 32-Year Bottom Pressure Record at Axial Seamount[J],2020,47(10).
APA	Fine I.V.,Thomson R.E.,Chadwick W.W.,Jr.,&Fox C.G..(2020).Toward a Universal Frequency of Occurrence Distribution for Tsunamis: Statistical Analysis of a 32-Year Bottom Pressure Record at Axial Seamount.Geophysical Research Letters,47(10).
MLA	Fine I.V.,et al."Toward a Universal Frequency of Occurrence Distribution for Tsunamis: Statistical Analysis of a 32-Year Bottom Pressure Record at Axial Seamount".Geophysical Research Letters 47.10(2020).