Source location of volcanic earthquakes and subsurface characterization using fiber-optic cable and distributed acoustic sensing system

Abstract We present one of the first studies on source location determination for volcanic earthquakes and characterization of volcanic subsurfaces using data from a distributed acoustic sensing (DAS) system. Using the arrival time difference estimated from well-correlated waveforms and a dense spat...

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Autores principales:	Takeshi Nishimura, Kentaro Emoto, Hisashi Nakahara, Satoshi Miura, Mare Yamamoto, Shunsuke Sugimura, Ayumu Ishikawa, Tsunehisa Kimura
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/66beb0d14ba9428e83f4ed85c23dd554
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spelling	oai:doaj.org-article:66beb0d14ba9428e83f4ed85c23dd5542021-12-02T16:31:03ZSource location of volcanic earthquakes and subsurface characterization using fiber-optic cable and distributed acoustic sensing system10.1038/s41598-021-85621-82045-2322https://doaj.org/article/66beb0d14ba9428e83f4ed85c23dd5542021-03-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-85621-8https://doaj.org/toc/2045-2322Abstract We present one of the first studies on source location determination for volcanic earthquakes and characterization of volcanic subsurfaces using data from a distributed acoustic sensing (DAS) system. Using the arrival time difference estimated from well-correlated waveforms and a dense spatial distribution of seismic amplitudes recorded along the fiber-optic cable, we determine the hypocenters of volcanic earthquakes recorded at Azuma volcano, Japan. The sources are located at a shallow depth beneath active volcanic areas with a range of approximately 1 km. Spatial distribution of the site amplification factors determined from coda waves of regional tectonic earthquakes are well correlated with old lava flow distributions and volcano topography. Since DAS observation can be performed remotely and buried fiber-optic cables are not damaged by volcanic ash or bombs during eruptions, this new observation system is suitable for monitoring of volcanoes without risk of system damage and for evaluating volcanic structures.Takeshi NishimuraKentaro EmotoHisashi NakaharaSatoshi MiuraMare YamamotoShunsuke SugimuraAyumu IshikawaTsunehisa KimuraNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-12 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Takeshi Nishimura Kentaro Emoto Hisashi Nakahara Satoshi Miura Mare Yamamoto Shunsuke Sugimura Ayumu Ishikawa Tsunehisa Kimura Source location of volcanic earthquakes and subsurface characterization using fiber-optic cable and distributed acoustic sensing system
description	Abstract We present one of the first studies on source location determination for volcanic earthquakes and characterization of volcanic subsurfaces using data from a distributed acoustic sensing (DAS) system. Using the arrival time difference estimated from well-correlated waveforms and a dense spatial distribution of seismic amplitudes recorded along the fiber-optic cable, we determine the hypocenters of volcanic earthquakes recorded at Azuma volcano, Japan. The sources are located at a shallow depth beneath active volcanic areas with a range of approximately 1 km. Spatial distribution of the site amplification factors determined from coda waves of regional tectonic earthquakes are well correlated with old lava flow distributions and volcano topography. Since DAS observation can be performed remotely and buried fiber-optic cables are not damaged by volcanic ash or bombs during eruptions, this new observation system is suitable for monitoring of volcanoes without risk of system damage and for evaluating volcanic structures.
format	article
author	Takeshi Nishimura Kentaro Emoto Hisashi Nakahara Satoshi Miura Mare Yamamoto Shunsuke Sugimura Ayumu Ishikawa Tsunehisa Kimura
author_facet	Takeshi Nishimura Kentaro Emoto Hisashi Nakahara Satoshi Miura Mare Yamamoto Shunsuke Sugimura Ayumu Ishikawa Tsunehisa Kimura
author_sort	Takeshi Nishimura
title	Source location of volcanic earthquakes and subsurface characterization using fiber-optic cable and distributed acoustic sensing system
title_short	Source location of volcanic earthquakes and subsurface characterization using fiber-optic cable and distributed acoustic sensing system
title_full	Source location of volcanic earthquakes and subsurface characterization using fiber-optic cable and distributed acoustic sensing system
title_fullStr	Source location of volcanic earthquakes and subsurface characterization using fiber-optic cable and distributed acoustic sensing system
title_full_unstemmed	Source location of volcanic earthquakes and subsurface characterization using fiber-optic cable and distributed acoustic sensing system
title_sort	source location of volcanic earthquakes and subsurface characterization using fiber-optic cable and distributed acoustic sensing system
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/66beb0d14ba9428e83f4ed85c23dd554
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Source location of volcanic earthquakes and subsurface characterization using fiber-optic cable and distributed acoustic sensing system

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