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Updated: Jul 11, 2026

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Kinematic History of a Salient-recess Junction Explored through a Combined Approach of Field Data and Analog Sandbox Modeling
Published on: August 5, 2016
El estrés que desencadenó el terremoto de 1994 en Northridge, California, fue provocado por sus predecesores
Resumen
Los grandes terremotos en el sur de California desde 1933 han transferido el estrés a fallas cercanas. Estos cambios de estrés, aunque pequeños, pueden influir en el tiempo y la ocurrencia de futuros terremotos cerca de Los Ángeles.
Área de la Ciencia:
- Geofísica de la Tierra sólida Geofísica de la Tierra sólida
- Sismología Sismología Sismología.
- La tectónica es la tectónica.
Sus antecedentes:
- Los terremotos pueden alterar las condiciones de estrés en fallas cercanas.
- Comprender la transferencia de estrés es crucial para la evaluación del peligro sísmico.
Objetivo del estudio:
- Para modelar los cambios de tensión de Coulomb acumulados en las fallas del sur de California debido a terremotos históricos (M >/= 6) desde 1933.
- Evaluar el impacto potencial de estos cambios de estrés en la actividad sísmica futura.
Principales métodos:
- Utilizó un modelo computacional para simular la transferencia de estrés.
- Se analizaron datos históricos de terremotos (magnitud del momento M >/= 6) cerca de Los Ángeles desde 1933.
Principales resultados:
- Los terremotos de 1933 y 1952 aumentaron el estrés en el sitio del terremoto de San Fernando de 1971.
- El terremoto de San Fernando de 1971 aumentó el estrés en los sitios de ruptura de 1987 Whittier Narrows y 1994 Northridge.
- El terremoto de Northridge de 1994 aumentó la tensión en las áreas de sus réplicas y fallas de superficie.
- Desde 1933, los cambios de tensión acumulados de más de 1 bar se han impartido a las fallas de Oak Ridge, Sierra Madre, las montañas de Santa Mónica, Elysian Park y Newport-Inglewood.
Conclusiones:
- Los cambios de estrés de terremotos moderados a grandes cerca de Los Ángeles son significativos.
- Estos cambios de tensión, aunque pequeños, pueden actuar como desencadenantes de terremotos si las fallas están cerca de la falla.
- La transferencia de estrés puede adelantar el tiempo de futuros terremotos en fallas de estrés crítico.
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