气候变化领域集成服务门户(CCPortal): Abundant Spontaneous and Dynamically Triggered Submarine Landslides in the Gulf of Mexico

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DOI	10.1029/2020GL087213
	Abundant Spontaneous and Dynamically Triggered Submarine Landslides in the Gulf of Mexico
	Fan W.; McGuire J.J.; Shearer P.M.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:12
英文摘要	Submarine landslides that occur offshore are common along the U.S. continental margins. These mass wasting events can trigger tsunamis and hence potentially devastate coastal communities and damage offshore infrastructure. However, the initiation and failure processes of submarine landslides are poorly understood. Here, we identify and locate 85 previously unknown submarine landslides in the Gulf of Mexico from 2008 to 2015. Ten of these landslides failed spontaneously while the remaining 75 were dynamically triggered by passing seismic surface waves from distant earthquakes with magnitudes as small as ∼5. Our observations demonstrate ongoing submarine landslide activity in the Gulf of Mexico where dense energy industry infrastructure is present and that the region is prone to secondary seismic hazard despite the low local seismicity rate. Our results should facilitate future investigations to identify unstable offshore slopes, to illuminate dynamic processes of landslides, and perhaps to apply remote detection technology in tsunami warning systems. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Earthquakes; Offshore oil well production; Offshore technology; Submarine geology; Submarines; Surface waves; Tsunamis; Coastal communities; Continental margin; Mass-wasting events; Offshore infrastructure; Remote detection; Seismic surface wave; Submarine landslides; Tsunami warning systems; Landslides; continental margin; energy dissipation; flood damage; offshore application; seismic hazard; seismicity; submarine landslide; tsunami event; Atlantic Coast [North America]; Atlantic Coast [United States]; Atlantic Ocean; Gulf of Mexico; United States
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/170221
作者单位	Department of Earth, Ocean and Atmospheric Science, Florida State University, Tallahassee, FL, United States; U.S. Geological Survey, Earthquake Science Center, Moffett Field, CA, United States; Scripps Institution of Oceanography, UC San Diego, La Jolla, CA, United States
推荐引用方式 GB/T 7714	Fan W.,McGuire J.J.,Shearer P.M.. Abundant Spontaneous and Dynamically Triggered Submarine Landslides in the Gulf of Mexico[J],2020,47(12).
APA	Fan W.,McGuire J.J.,&Shearer P.M..(2020).Abundant Spontaneous and Dynamically Triggered Submarine Landslides in the Gulf of Mexico.Geophysical Research Letters,47(12).
MLA	Fan W.,et al."Abundant Spontaneous and Dynamically Triggered Submarine Landslides in the Gulf of Mexico".Geophysical Research Letters 47.12(2020).