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Data Processing Methods for 3D Seismic Imaging of Subsurface Volcanoes: Applications to the Tarim Flood Basalt

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Pronóstico de lavas sísmicas y erupciones explosivas.

Y Lavallée¹, P G Meredith, D B Dingwell

¹Department of Earth and Environmental Sciences, Ludwig-Maximilians University, 80333 Munich, Germany. lavallee@min.uni-muenchen.de

|May 24, 2008

Resumen

Este resumen es generado por máquina.

Las lavas de cúpula volcánica generan señales sísmicas a medida que se deforman. El monitoreo de estas señales a lo largo de la transición dúctil-frágil puede mejorar la predicción de erupciones volcánicas explosivas.

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Área de la Ciencia:

La geofísica es la geofísica.
Volcanología Volcanología.
Ciencia de los materiales Ciencia de los materiales.

Sus antecedentes:

Las erupciones de cúpula volcánica a menudo muestran un aumento de la sismicidad y las tasas de descarga antes de las explosiones.
El pronóstico actual de erupciones se basa en la sismicidad de la roca circundante, no en el propio magma.
La reología y la deformación de la lava son fundamentales para determinar el estilo de erupción.

Objetivo del estudio:

Investigar la naturaleza sísmica de las lavas de cúpula.
Comprender cómo la reología de la lava influye en la transición dúctil-frágil.
Explorar la aplicación de la sismicidad del magma a la predicción de erupciones.

Principales métodos:

Experimentos reológicos en lavas de cúpula.
Monitoreo microsísmico continuo durante los experimentos.
Análisis de la sismicidad a través de diferentes tasas de deformación.

Principales resultados:

Se ha confirmado que las lavas de cúpula son sismógenas.
Las características sísmicas cambian significativamente en la transición dúctil-frágil.
Aparecen patrones de sismicidad distintos antes de la falla de la fragilidad a altas tasas de deformación.

Conclusiones:

La sismicidad del magma proporciona información sobre el comportamiento de la lava del domo.
El monitoreo de la sismicidad del magma puede mejorar los modelos de pronóstico volcánico.
Los métodos de pronóstico de fallas aplicados a la sismicidad del magma son prometedores para las erupciones de cúpula.