Anatomy of a high-silica eruption as observed by a local seismic network: the June 2011 Puyehue-Cordon Caulle event (southern Andes, Chile)
| Primer Autor |
Tassara, Andres
|
| Co-autores |
Basualto, Daniel
Lazo-Gil, Jonathan
Franco-Marin, Luis
Cardona, Carlos
San Martin, Juan
Gil-Cruz, Fernando
Calabi-Floddy, Marcela
Farias, Cristian
|
| Título |
Anatomy of a high-silica eruption as observed by a local seismic network: the June 2011 Puyehue-Cordon Caulle event (southern Andes, Chile)
|
| Editorial |
COPERNICUS GESELLSCHAFT MBH
|
| Revista |
SOLID EARTH
|
| Lenguaje |
en
|
| Resumen |
High-silica explosive eruptions are one of the most dangerous natural phenomena, yet it is unclear which processes are involved in this infrequent kind of event. We present the first systematic characterization of near-field seismicity associated with a large high-silica eruption analyzing data recorded before, during and after the 4 June 2011 rhyolitic eruption of Puyehue-Cordon Caulle Volcanic Complex (PCCVC). Results of a first-level data processing, developed by the Southern Andean Volcano Observatory (OVDAS) to monitor unrest and the evolution of the eruption, are complemented here with the relocation of hypocenters into a local 1D velocity model, the time series of the b value and the computation of the focal mechanism. This information allows us to define several phases before and after the onset of the eruption, describing details of the space-time evolution of seismicity, defining and characterizing the seismic sources, and identifying the structural control of the magmatic intrusion and stress variations during the eruption. Our results illuminate several underlying processes, with emphasis on the possible role that basement structures had on the storage, transport and evacuation of magma. Integrating our results with previous findings based on satellite geodesy and petrology of erupted materials, we discuss general conceptual models regarding destabilization of structurally controlled acidic magmatic systems, the pass from unrest to eruption, and changes in eruptive style and waning phases of eruptions, with broader implications for monitoring and forecast of violent silicic eruptions.
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| Fecha Publicación |
2023
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| Tipo de Recurso |
artículo original
|
| doi |
10.5194/se-14-69-2023
|
| Formato Recurso |
PDF
|
| Palabras Claves |
Puyehue–Cordón Caulle Volcanic Complex
Southern Andean Volcano Observatory
volcanoes - monitoring - Chile
|
| Ubicación del archivo | |
| Categoría OCDE |
Geoquímica y Geofísica
|
| Materias |
Complejo Volcánico Puyehue-Cordón Caulle
Observatorio de Volcanes Andinos del Sur
volcanes - monitoreo - Chile
|
| Página de inicio (Recomendado-único) |
69.0
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| Página final (Recomendado-único) |
87
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| Identificador del recurso (Mandatado-único) |
artículo original
|
| Versión del recurso (Recomendado-único) |
versión publicada
|
| License |
CC BY 4.0
|
| Condición de la licencia (Recomendado-repetible) |
CC BY 4.0
|
| Derechos de acceso |
acceso abierto
|
| Access Rights |
acceso abierto
|
| Id de Web of Science |
WOS:000921405400001
|
| ISSN |
1869-9510
|
| Tipo de ruta |
verde# dorado
|
| Categoría WOS |
Geoquímica y Geofísica
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| Referencia del Financiador (Mandatado si es aplicable-repetible) |
ANID 3200387
ANID 1151175
ANID 19I10397
ANID NCN19_167
|
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