气候变化领域集成服务门户(CCPortal): The 2008 Eruptive Unrest at Cerro Azul Volcano (Galápagos) Revealed by InSAR Data and a Novel Method for Geodetic Modelling

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DOI	10.1029/2019JB018521
	The 2008 Eruptive Unrest at Cerro Azul Volcano (Galápagos) Revealed by InSAR Data and a Novel Method for Geodetic Modelling
	Galetto F.; Hooper A.; Bagnardi M.; Acocella V.
发表日期	2020
ISSN	21699313
卷号	125 期号:2
英文摘要	Cerro Azul is one of the most active volcanoes in the western Galápagos Islands, but its unrest episodes are poorly studied. Unrest, which started in 2007, culminated in two eruptive phases from 29 May to 11 June 2008. We investigate this unrest and the associated eruptions using interferometric synthetic aperture radar (InSAR) data and geodetic modelling. To overcome the unwrapping errors affecting some of our InSAR data, we invert the wrapped phase directly by estimating the integer ambiguities simultaneously with the geophysical parameters. Our results highlight how the eruption was preceded by long-term pre-eruptive inflation (October 2007–April 2008). During the first eruptive phase, most of the magma responsible for the inflation fed the lateral propagation of a radial dike, which caused a first deflation of the magmatic reservoir. During the second eruptive phase, the further lateral propagation of the dike fed a radial eruptive fissure at the base of the edifice, causing further deflation of the magmatic reservoir. From the first to the second eruptive phase, the radial dike changed its strike propagating toward a topographic low between Cerro Azul and Sierra Negra. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Cerro Azul; Galápagos; geodetic modelling; radial dike; Unrest; unwrapping errors
语种	英语
来源期刊	Journal of Geophysical Research: Solid Earth
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/187951
作者单位	Università degli Studi di Roma Tre, Dipartimento di Scienze, Rome, Italy; COMET, School of Earth and Environment, University of Leeds, Leeds, United Kingdom; Now at NASA Goddard Space Flight Center, Greenbelt, MD, United States
推荐引用方式 GB/T 7714	Galetto F.,Hooper A.,Bagnardi M.,et al. The 2008 Eruptive Unrest at Cerro Azul Volcano (Galápagos) Revealed by InSAR Data and a Novel Method for Geodetic Modelling[J],2020,125(2).
APA	Galetto F.,Hooper A.,Bagnardi M.,&Acocella V..(2020).The 2008 Eruptive Unrest at Cerro Azul Volcano (Galápagos) Revealed by InSAR Data and a Novel Method for Geodetic Modelling.Journal of Geophysical Research: Solid Earth,125(2).
MLA	Galetto F.,et al."The 2008 Eruptive Unrest at Cerro Azul Volcano (Galápagos) Revealed by InSAR Data and a Novel Method for Geodetic Modelling".Journal of Geophysical Research: Solid Earth 125.2(2020).