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Dynamic Pore-scale Reservoir-condition Imaging of Reaction in Carbonates Using Synchrotron Fast Tomography
Published on: February 21, 2017
El 1984 Morgan Hill, California, el terremoto y el terremoto
Resumen
El terremoto de Morgan Hill de 1984 (magnitud 6,1) ocurrió en la falla de Calaveras sin predicción a corto plazo. Su patrón de ruptura creó un intenso movimiento del suelo, incluida una aceleración horizontal récord cerca del extremo sureste.
Área de la Ciencia:
- Sismología Sismología Sismología.
- Ciencia de los terremotos Ciencia de los terremotos Ciencia de los terremotos Ciencia de los terremotos
- La geofísica es la geofísica.
Sus antecedentes:
- La zona de falla de Calaveras, al este de San José, California, experimentó un evento sísmico significativo.
- Un terremoto de magnitud 6 había ocurrido previamente en este segmento en 1911, lo que sugiere el potencial de recurrencia.
- A pesar del contexto histórico, no se identificaron precursores sísmicos a corto plazo antes del evento de 1984.
Objetivo del estudio:
- Para analizar las características de la ruptura y el movimiento del suelo del terremoto de 1984 Morgan Hill.
- Comprender los factores que contribuyen al patrón enfocado de la fuerte radiación sísmica.
- Investigar las razones de la falta de predicción de terremotos a corto plazo.
Principales métodos:
- Análisis de los datos sísmicos del terremoto de 1984 en Morgan Hill.
- Investigación de la dirección de propagación de la ruptura y las fuentes de radiación sísmica.
- Examen de las grabaciones de movimiento fuerte, incluida la aceleración máxima en tierra.
Principales resultados:
- El terremoto implicó una ruptura unilateral que se propaga al sur-sureste a lo largo de un segmento de falla de 30 km.
- Una fuente energética de radiación sísmica cerca del extremo sureste influyó significativamente en el movimiento del suelo.
- Se registró una aceleración horizontal excepcionalmente alta de 1,29g en un pilar de presa cerca del extremo de la ruptura.
Conclusiones:
- La dinámica de ruptura del terremoto de Morgan Hill de 1984 condujo a un patrón de movimiento fuerte altamente localizado e intenso.
- La ausencia de precursores predecibles a corto plazo pone de relieve los desafíos en el pronóstico de terremotos para este segmento de falla.
- Comprender la complejidad de la ruptura es crucial para la evaluación del peligro sísmico en la región.
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