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Las tasas de deslizamiento de fallas en profundidad de los intervalos de repetición de repetidos micro-terremotos
1Earth Sciences Division, Lawrence Berkeley National Laboratory, and Berkeley Seismological Laboratory, University of California, Berkeley, CA 94720, USA.
Science (New York, N.Y.)
|July 31, 1999
Resumen
Los investigadores analizaron los patrones de micro-terremotos en Parkfield, California, para estimar las tasas de deslizamiento de fallas en profundidad. Este nuevo método revela cambios en la tasa de deslizamiento vinculados a la actividad sísmica, ofreciendo una nueva forma de monitorear las zonas de falla.
Área de la Ciencia:
- La geofísica es la geofísica.
- Sismología Sismología Sismología.
- Ciencia de los terremotos Ciencia de los terremotos Ciencia de los terremotos Ciencia de los terremotos
Sus antecedentes:
- Las secuencias recurrentes de micro-terremotos exhiben atributos únicos.
- Comprender la tasa de deslizamiento en profundidad es crucial para la evaluación del peligro sísmico.
Objetivo del estudio:
- Desarrollar y aplicar un método para inferir las tasas de deslizamiento profundo utilizando intervalos de tiempo de micro-terremotos.
- Para investigar las variaciones espaciales y temporales en la tasa de deslizamiento a lo largo de una falla activa.
Principales métodos:
- Análisis de un registro de microseismicidad de 11 años de Parkfield, California.
- Utilizando intervalos de tiempo entre secuencias similares y recurrentes de micro-terremotos.
- Correlación de las tasas de deslizamiento inferidas con la actividad sísmica y las medidas de deslizamiento independientes.
Principales resultados:
- Se identificaron cambios espaciales y temporales sistemáticos en la tasa de deslizamiento.
- Las variaciones de la tasa de deslizamiento observadas fueron sincrónicas con la actividad sísmica.
- El método demostró consistencia con otras mediciones de deslizamiento de la zona de falla.
Conclusiones:
- Se pueden utilizar secuencias de micro-terremotos para inferir las tasas de deslizamiento de fallas profundas.
- Este fenómeno ofrece un método potencial para el monitoreo de campos de deformación en zonas de fallas sísmicas.
- Se necesita más investigación para confirmar la aplicabilidad general a otras fallas activas.
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