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Cambios en la anisotropía sísmica después de erupciones volcánicas: evidencia del Monte Ruapehu
1Institute of Geophysics, Victoria University of Wellington, Wellington, New Zealand.
Science (New York, N.Y.)
|September 22, 2001
Resumen
Las erupciones volcánicas pueden alterar el estrés local, ofreciendo una nueva forma de monitorear los volcanes andesitas. Los cambios en las ondas de corte sísmico después de una erupción indican esta liberación de estrés localizada.
Área de la Ciencia:
- La geofísica es la geofísica.
- Volcanología Volcanología.
- Sismología Sismología Sismología.
Sus antecedentes:
- Los volcanes andinositas presentan importantes riesgos de erupción que son difíciles de predecir.
- La actividad volcánica puede generar fuerzas poderosas capaces de influir en los patrones de estrés regionales.
Objetivo del estudio:
- Para investigar los cambios en la forma de onda sísmica después de una erupción de un volcán de andesita.
- Explorar el potencial de usar estos cambios como un nuevo método de monitoreo de volcanes.
Principales métodos:
- El análisis de la polarización de la onda de corte cambia con el tiempo.
- Interpretación de los datos sísmicos en el contexto de los regímenes de estrés volcánico.
Principales resultados:
- Cambios temporales observados en la polarización de onda de corte después de una erupción en el Monte Ruapehu, Nueva Zelanda.
- Estos cambios sugieren un régimen de estrés localizado inducido por el volcán.
Conclusiones:
- Las fuerzas volcánicas pueden anular localmente el estrés regional, proporcionando información sobre la dinámica de las erupciones.
- El monitoreo de la polarización de onda de corte ofrece un nuevo enfoque prometedor para predecir futuras erupciones volcánicas.
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