Temporal seismic wave velocity variations at Láscar volcano

We report on the first study using Seismic Wave Interferometry to determine variations of seismic velocities through time, in the vicinity of Láscar volcano in Chile. Seismic Wave Interferometry has been used as a powerful tool to determine spatial and temporal changes of seismic velocities within t...

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Autores principales:	González,Diego M, Bataille,Klaus, Eulenfeld,Tom, Franco,Luis E
Lenguaje:	English
Publicado:	Servicio Nacional de Geología y Minería (SERNAGEOMIN) 2016
Materias:	Seismic Wave Interferometry Seismic Ambient Noise Velocity variations Láscar volcano
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-71062016000200005
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spelling	oai:scielo:S0718-710620160002000052016-07-11Temporal seismic wave velocity variations at Láscar volcanoGonzález,Diego MBataille,KlausEulenfeld,TomFranco,Luis E Seismic Wave Interferometry Seismic Ambient Noise Velocity variations Láscar volcano We report on the first study using Seismic Wave Interferometry to determine variations of seismic velocities through time, in the vicinity of Láscar volcano in Chile. Seismic Wave Interferometry has been used as a powerful tool to determine spatial and temporal changes of seismic velocities within the Earth. Spatial variations of seismic velocities are related to heterogeneities of material properties, which are expected to occur in a complex structure. However, temporal changes are indicative of dynamic process within the elastic media, and thus, this tool can be used to monitor dynamic processes at volcanic zones. We find consistent variations on three stations close to the volcano, with dv/v of ±0.6%, most likely related to the inflation/deflation process due to fluid movement of magmatic or hydrothermal origin within the volcanic structure. During the observed period of velocity variation, OVDAS reported an increase of volcanic activity evidenced by the increase of the number of long period seismic events, increase of gas emissions and the formation of incandescence above the crater. We suggest that this tool can contribute to the understanding of volcano related dynamic processes, as well as for routine volcano monitoring purposes.info:eu-repo/semantics/openAccessServicio Nacional de Geología y Minería (SERNAGEOMIN)Andean geology v.43 n.2 20162016-05-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-71062016000200005en10.5027/andgeoV43n2-a05
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Seismic Wave Interferometry Seismic Ambient Noise Velocity variations Láscar volcano
spellingShingle	Seismic Wave Interferometry Seismic Ambient Noise Velocity variations Láscar volcano González,Diego M Bataille,Klaus Eulenfeld,Tom Franco,Luis E Temporal seismic wave velocity variations at Láscar volcano
description	We report on the first study using Seismic Wave Interferometry to determine variations of seismic velocities through time, in the vicinity of Láscar volcano in Chile. Seismic Wave Interferometry has been used as a powerful tool to determine spatial and temporal changes of seismic velocities within the Earth. Spatial variations of seismic velocities are related to heterogeneities of material properties, which are expected to occur in a complex structure. However, temporal changes are indicative of dynamic process within the elastic media, and thus, this tool can be used to monitor dynamic processes at volcanic zones. We find consistent variations on three stations close to the volcano, with dv/v of ±0.6%, most likely related to the inflation/deflation process due to fluid movement of magmatic or hydrothermal origin within the volcanic structure. During the observed period of velocity variation, OVDAS reported an increase of volcanic activity evidenced by the increase of the number of long period seismic events, increase of gas emissions and the formation of incandescence above the crater. We suggest that this tool can contribute to the understanding of volcano related dynamic processes, as well as for routine volcano monitoring purposes.
author	González,Diego M Bataille,Klaus Eulenfeld,Tom Franco,Luis E
author_facet	González,Diego M Bataille,Klaus Eulenfeld,Tom Franco,Luis E
author_sort	González,Diego M
title	Temporal seismic wave velocity variations at Láscar volcano
title_short	Temporal seismic wave velocity variations at Láscar volcano
title_full	Temporal seismic wave velocity variations at Láscar volcano
title_fullStr	Temporal seismic wave velocity variations at Láscar volcano
title_full_unstemmed	Temporal seismic wave velocity variations at Láscar volcano
title_sort	temporal seismic wave velocity variations at láscar volcano
publisher	Servicio Nacional de Geología y Minería (SERNAGEOMIN)
publishDate	2016
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-71062016000200005
work_keys_str_mv	AT gonzalezdiegom temporalseismicwavevelocityvariationsatlascarvolcano AT batailleklaus temporalseismicwavevelocityvariationsatlascarvolcano AT eulenfeldtom temporalseismicwavevelocityvariationsatlascarvolcano AT francoluise temporalseismicwavevelocityvariationsatlascarvolcano
_version_	1714205853179969536

Temporal seismic wave velocity variations at Láscar volcano

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