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Erupción libre de precursores provocada por la ruptura del edificio en el volcán Nyiragongo
D Smittarello1, B Smets2,3, J Barrière4
1European Center for Geodynamics and Seismology, Walferdange, Grand Duchy of Luxembourg. delphine.smittarello@ecgs.lu.
Nature
|August 31, 2022
Resumen
El monte Nyiragongo
Área de la Ciencia:
- Volcanología
- La geofísica
- Geoquímica
Sus antecedentes:
- Los modelos clásicos de erupción volcánica incluyen acumulación de presión y ascenso de magma.
- Los volcanes abiertos con lagos de lava persistentes presentan desafíos de monitoreo únicos.
- La erupción del Monte Nyiragongo de 2021 se desvió de los modelos típicos impulsados por precursores.
Objetivo del estudio:
- Para investigar la erupción atípica del flanco del Monte Nyiragongo el 22 de mayo de 2021.
- Para analizar la secuencia inversa de los precursores de la erupción y el movimiento del magma.
- Comprender los mecanismos detrás de la ruptura del edificio y la posterior intrusión del dique.
Principales métodos:
- Análisis de los datos geofísicos y geoquímicos.
- Modelado del ascenso del magma y la propagación del dique.
- Interpretación de la secuencia de erupción del flanco del Monte Nyiragongo 2021.
Principales resultados:
- La erupción del Monte Nyiragongo fue iniciada por la ruptura del edificio, no por el típico ascenso de magma.
- Un dique de 25 kilómetros de largo se introdujo poco profundamente debajo de Goma, Gisenyi y el lago Kivu.
- La erupción ocurrió sin precursores aparentes, con movimiento de magma después de la erupción.
Conclusiones:
- El estudio desafía los modelos convencionales de precursores de erupción para los volcanes de viento abierto.
- Los hallazgos ponen de relieve los riesgos de eventos peligrosos como efusiones urbanas o erupciones limnicas.
- El monitoreo eficaz y la gestión de riesgos para los sistemas de magma poco profundos siguen siendo críticos.
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