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Los terremotos lentos coinciden con temblores episódicos y eventos de deslizamiento lento
Yoshihiro Ito1, Kazushige Obara, Katsuhiko Shiomi
1National Research Institute for Earth Science and Disaster Prevention, 3-1 Tennodai, Tsukuba 305-0006, Japan. yito@bosai.go.jp
Science (New York, N.Y.)
|December 2, 2006
Resumen
Terremotos de muy baja frecuencia en Japón.
Área de la Ciencia:
- La geofísica es la geofísica.
- Sismología Sismología Sismología.
- La tectónica de placas es la tectónica de placas.
Sus antecedentes:
- La zona de subducción de Nankai en el suroeste de Japón es una región de actividad sísmica significativa.
- Comprender los terremotos lentos es crucial para evaluar los peligros sísmicos.
Objetivo del estudio:
- Para investigar los terremotos de muy baja frecuencia (VLFE) en la zona de subducción de Nankai.
- Para analizar la relación entre VLFE, temblores profundos de baja frecuencia y eventos de deslizamiento lento.
Principales métodos:
- Análisis de las ondas sísmicas de los VLFE.
- Correlación de los datos sísmicos con temblores profundos de baja frecuencia y eventos de deslizamiento lento.
Principales resultados:
- Los VLFE exhiben ondas sísmicas con un período dominante de aproximadamente 20 segundos.
- La sismicidad VLFE está estrechamente asociada y migra con temblores profundos de baja frecuencia y eventos de deslizamiento lento.
Conclusiones:
- La ocurrencia simultánea de VLFE, temblores y eventos de deslizamiento lento ayuda en la detección y caracterización de terremotos lentos.
- Estos fenómenos de terremotos lentos pueden aumentar el estrés en las zonas adyacentes de ruptura de terremotos de megathrust.
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