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Un evento de propagación del fondo marino capturado por sismómetros
Resumen
Las erupciones de la cresta del océano medio, responsables de la expansión del fondo marino, fueron monitoreadas con sismómetros. Este estudio sugiere que la predicción de erupciones puede ser posible debido a la actividad sísmica precursora observada.
Área de la Ciencia:
- La geofísica es la geofísica.
- Geología marina Geología marina.
- La tectónica es la tectónica.
Sus antecedentes:
- Las cordilleras oceánicas crean dos tercios de la superficie de la Tierra a través de la extensión del fondo marino.
- Comprender estos eventos de aguas profundas es un desafío debido a su ubicación.
- Las investigaciones anteriores han limitado la comprensión de los mecanismos precisos de las erupciones de las crestas.
Objetivo del estudio:
- Para investigar las características microearthquake de una erupción de la cresta del océano medio.
- Para identificar la actividad sísmica precursora que precede a una erupción.
- Evaluar el potencial para pronosticar erupciones en crestas de rápida propagación.
Principales métodos:
- Despliegue de sismómetros del fondo del océano a 9 grados 50'N en la elevación del Pacífico Este.
- Monitoreo sísmico continuo desde octubre de 2003 hasta enero de 2006.
- Análisis de patrones de micro-terremotos y tasas de actividad.
Principales resultados:
- Actividad registrada de micro-terremotos asociada con una erupción de una cresta oceánica media.
- Se observó un aumento gradual en las tasas de actividad sísmica antes del evento principal.
- Documentó un intenso evento de diqueo de ~6 horas el 22 de enero de 2006, seguido de una disminución de la sismicidad.
Conclusiones:
- El monitoreo sísmico puede capturar la actividad detallada de las erupciones de la cresta oceánica media.
- El aumento sísmico preliminar indica potencial para la predicción de erupciones en entornos de rápida propagación.
- El patrón observado proporciona información sobre la dinámica de los eventos de propagación del fondo marino.
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