Inferring Magma Dynamics at Veniaminof Volcano Via Application of Ambient Noise

doi:10.1029/2018GL079909

CORC > 武汉植物园 > 中国科学院武汉植物园

	Inferring Magma Dynamics at Veniaminof Volcano Via Application of Ambient Noise
	Bennington, N.2; Haney, M.1; Thurber, C.2; Zeng, X.3
刊名	GEOPHYSICAL RESEARCH LETTERS
	2018-11-16
卷号	45 期号:21 页码:11650-11658
ISSN号	0094-8276
DOI	10.1029/2018GL079909
英文摘要	Ambient noise interferometry has become an increasingly popular tool for monitoring active volcanoes. We apply this method to investigate seven past eruptive periods at Veniaminof volcano, Alaska. Two of the largest eruptions studied show seismic velocity changes associated with preeruptive, coeruptive, and posteruptive volcanic processes. We develop and implement new analysis techniques to determine how seismic velocity changes at Veniaminof are distributed with depth. Spatiotemporal examination of these seismic velocity changes reveals evidence for the distribution of magma storage and the timescale at which magmatic fluids intrude into and reside within these storage regions in the months preceding eruption. We conduct the depth analysis using data recorded on a single seismometer. The same analysis could be applied to any volcano monitored by at least one seismometer in order to detect magmatic activity indicative of impending eruption, specifically the intrusion and migration of magmatic fluids into the volcanic system. Plain Language Summary Veniaminof is one of the most active volcanoes in Alaska. Eruptions at the volcano occur frequently and can begin with little to no warning. In this study, we explore new and emerging seismic methods for identifying magmatic activity indicative of eruption. First, we apply the technique of ambient noise interferometry to determine subtle changes in seismic velocity within Veniaminof's subsurface. Such changes in seismic velocity indicate the movement of magmatic fluids into the volcanic system as early as weeks to months prior to the start of the two largest eruptions examined. In the second part of our study, we develop new techniques to determine changes in seismic velocity as a function of both depth and time. This analysis provides evidence for the timescales and depths at which magmatic fluids migrate through and are stored within the crust preceding eruption at Veniaminof. In order to carry out this spatiotemporal analysis, we utilize seismic data recorded on a single seismometer. Thus, the same analysis could be applied at any volcano monitored by even a single seismometer in an effort to identify the intrusion, migration, and storage of magmatic fluids in the time leading to eruption.
资助项目	National Science Foundation[EAR-1449282] ; Seismological Facilities for the Advancement of Geoscience and EarthScope (SAGE) of the National Science Foundation[EAR-1261681]
WOS研究方向	Geology
语种	英语
出版者	AMER GEOPHYSICAL UNION
WOS记录号	WOS:000451832600017
内容类型	期刊论文
源URL	[http://202.127.146.157/handle/2RYDP1HH/3488]
专题	中国科学院武汉植物园
通讯作者	Bennington, N.
作者单位	1.US Geol Survey, Alaska Volcano Observ, Anchorage, AK USA 2.Univ Wisconsin, Dept Geosci, Madison, WI 53706 USA 3.Chinese Acad Sci, Inst Geodesy & Geophys, Wuhan, Hubei, Peoples R China
推荐引用方式 GB/T 7714	Bennington, N.,Haney, M.,Thurber, C.,et al. Inferring Magma Dynamics at Veniaminof Volcano Via Application of Ambient Noise[J]. GEOPHYSICAL RESEARCH LETTERS,2018,45(21):11650-11658.
APA	Bennington, N.,Haney, M.,Thurber, C.,&Zeng, X..(2018).Inferring Magma Dynamics at Veniaminof Volcano Via Application of Ambient Noise.GEOPHYSICAL RESEARCH LETTERS,45(21),11650-11658.
MLA	Bennington, N.,et al."Inferring Magma Dynamics at Veniaminof Volcano Via Application of Ambient Noise".GEOPHYSICAL RESEARCH LETTERS 45.21(2018):11650-11658.