Combined thermal and seismic analysis of the Villarrica volcano lava lake, Chile

Villarrica volcano, a 2,850 m basaltic-andesite stratocone in southern Chile (39°25'S-71° 42'W), has had an active summit lava lake (30-60 m diameter) since the last eruption in 1984-85. Current activity is characterised by mild strombolian activity, continuous degassing, and periodic larg...

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Autores principales:	Calder,Eliza S., Harris,Andrew J.L., Peña,Paola, Pilger,Eric, Flynn,Luke P., Fuentealba,Gustavo, Moreno,Hugo
Lenguaje:	English
Publicado:	Servicio Nacional de Geología y Minería (SERNAGEOMIN) 2004
Materias:	Strombolian Villarrica volcano Radiance Lava lake Seismicity GOES
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-02082004000200005
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spelling	oai:scielo:S0716-020820040002000052005-03-23Combined thermal and seismic analysis of the Villarrica volcano lava lake, ChileCalder,Eliza S.Harris,Andrew J.L.Peña,PaolaPilger,EricFlynn,Luke P.Fuentealba,GustavoMoreno,Hugo Strombolian Villarrica volcano Radiance Lava lake Seismicity GOES Villarrica volcano, a 2,850 m basaltic-andesite stratocone in southern Chile (39°25'S-71° 42'W), has had an active summit lava lake (30-60 m diameter) since the last eruption in 1984-85. Current activity is characterised by mild strombolian activity, continuous degassing, and periodic larger explosions. Between August-December 1999, Villarrica showed a significant increase in seismic activity. Lava lake activity increased and larger discrete explosions occurred destroying the lava lake crust on, at least, 4 occasions. Since February 1999, radiance data provided by the NOAA GOES 8 satellite via the University of Hawaii hot spot monitoring web-site served, as an additional real time monitoring method of the lava lake. Preliminary GOES data, for the period February-December 1999, have been correlated with seismic RSAM data and visual observations. Correlations exist between these data sets only for the most active periods. At Villarrica, the small dimensional and temporal exposure of the lava lake surface and the narrow crater coupled with a low satellite viewing angle generate a very subtle hot spot signature. Radiance variations can only provide reliable data where adequate constraining ground information exists and viewing conditions are optimal. However, the hot spot tool, once refined is considered a potentially important method of improving the monitoring capabilitiesinfo:eu-repo/semantics/openAccessServicio Nacional de Geología y Minería (SERNAGEOMIN)Revista geológica de Chile v.31 n.2 20042004-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-02082004000200005en10.4067/S0716-02082004000200005
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Strombolian Villarrica volcano Radiance Lava lake Seismicity GOES
spellingShingle	Strombolian Villarrica volcano Radiance Lava lake Seismicity GOES Calder,Eliza S. Harris,Andrew J.L. Peña,Paola Pilger,Eric Flynn,Luke P. Fuentealba,Gustavo Moreno,Hugo Combined thermal and seismic analysis of the Villarrica volcano lava lake, Chile
description	Villarrica volcano, a 2,850 m basaltic-andesite stratocone in southern Chile (39°25'S-71° 42'W), has had an active summit lava lake (30-60 m diameter) since the last eruption in 1984-85. Current activity is characterised by mild strombolian activity, continuous degassing, and periodic larger explosions. Between August-December 1999, Villarrica showed a significant increase in seismic activity. Lava lake activity increased and larger discrete explosions occurred destroying the lava lake crust on, at least, 4 occasions. Since February 1999, radiance data provided by the NOAA GOES 8 satellite via the University of Hawaii hot spot monitoring web-site served, as an additional real time monitoring method of the lava lake. Preliminary GOES data, for the period February-December 1999, have been correlated with seismic RSAM data and visual observations. Correlations exist between these data sets only for the most active periods. At Villarrica, the small dimensional and temporal exposure of the lava lake surface and the narrow crater coupled with a low satellite viewing angle generate a very subtle hot spot signature. Radiance variations can only provide reliable data where adequate constraining ground information exists and viewing conditions are optimal. However, the hot spot tool, once refined is considered a potentially important method of improving the monitoring capabilities
author	Calder,Eliza S. Harris,Andrew J.L. Peña,Paola Pilger,Eric Flynn,Luke P. Fuentealba,Gustavo Moreno,Hugo
author_facet	Calder,Eliza S. Harris,Andrew J.L. Peña,Paola Pilger,Eric Flynn,Luke P. Fuentealba,Gustavo Moreno,Hugo
author_sort	Calder,Eliza S.
title	Combined thermal and seismic analysis of the Villarrica volcano lava lake, Chile
title_short	Combined thermal and seismic analysis of the Villarrica volcano lava lake, Chile
title_full	Combined thermal and seismic analysis of the Villarrica volcano lava lake, Chile
title_fullStr	Combined thermal and seismic analysis of the Villarrica volcano lava lake, Chile
title_full_unstemmed	Combined thermal and seismic analysis of the Villarrica volcano lava lake, Chile
title_sort	combined thermal and seismic analysis of the villarrica volcano lava lake, chile
publisher	Servicio Nacional de Geología y Minería (SERNAGEOMIN)
publishDate	2004
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-02082004000200005
work_keys_str_mv	AT calderelizas combinedthermalandseismicanalysisofthevillarricavolcanolavalakechile AT harrisandrewjl combinedthermalandseismicanalysisofthevillarricavolcanolavalakechile AT penapaola combinedthermalandseismicanalysisofthevillarricavolcanolavalakechile AT pilgereric combinedthermalandseismicanalysisofthevillarricavolcanolavalakechile AT flynnlukep combinedthermalandseismicanalysisofthevillarricavolcanolavalakechile AT fuentealbagustavo combinedthermalandseismicanalysisofthevillarricavolcanolavalakechile AT morenohugo combinedthermalandseismicanalysisofthevillarricavolcanolavalakechile
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Combined thermal and seismic analysis of the Villarrica volcano lava lake, Chile

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