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Cómo los terremotos organizan el estrés

Emily E Brodsky¹, Gaspard Farge^1,2

¹Department of Earth and Planetary Sciences, University of California, Santa Cruz, CA 95060.

Proceedings of the National Academy of Sciences of the United States of America

|February 6, 2026

Resumen

Los terremotos no tienen un estrés uniforme. Los experimentos naturales revelan distribuciones de estrés consistentes en la corteza terrestre, lo que sugiere autoorganización y redistribución de energía durante los eventos sísmicos.

Área de la Ciencia:

Geofísica
Sismología
Ciencia de la Tierra

Sus antecedentes:

El estrés de la Tierra no es uniforme, lo que requiere experimentos naturales para comprender la distribución del estrés.
Estudios anteriores a menudo se basaron en valores únicos, pasando por alto las variaciones espaciales.

Objetivo del estudio:

Medir la distribución del estrés y cantidades relacionadas utilizando experimentos naturales.
Investigar los procesos de autoorganización y redistribución de energía en la corteza terrestre.

Principales métodos:

Utilización de experimentos naturales, incluido el disparo dinámico en el sur de California.
Análisis de la probabilidad de ruptura de fallas en barreras para comprender la distribución de energía in situ.
Examen de la rugosidad de las fallas como indicador de la distribución de la resistencia.

Principales resultados:

Se encontraron distribuciones observables y consistentes de estrés y cantidades relacionadas.
La evidencia sugiere un grado de autoorganización en la corteza terrestre.
Se demostró que los terremotos redistribuyen eficazmente el estrés y la energía de deformación.

Conclusiones:

La forma funcional de las distribuciones de estrés puede seguir los cambios y diferenciar los sistemas de fallas.
La autoorganización es una característica robusta de los sistemas de terremotos, siendo la redistribución del estrés un resultado clave.
Las fallas de la zona de subducción se sincronizan debido a la simplicidad, mientras que las fallas continentales como las del sur de California no lo hacen debido a la complejidad.

Palabras clave:

terremotos fricción estrés

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