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La naturaleza de los aterrizadores-línea de terremotos Mojave
Science (New York, N.Y.)
|July 9, 1993
Resumen
Un reciente terremoto en California sugiere que una nueva línea de falla puede estar formándose en el desierto de Mojave. Esta característica geológica podría estar alterando la forma en que la región se adapta al estrés tectónico, impactando en los sistemas de fallas más antiguos.
Área de la Ciencia:
- La geofísica es la geofísica.
- La tectónica es la tectónica.
- Sismología Sismología Sismología.
Sus antecedentes:
- La región de Mojave ha experimentado seis terremotos significativos en 60 años.
- El terremoto de Landers (1992, M=7.3) es el evento más reciente.
- La alineación del epicentro sugiere un potencial nuevo sistema de fallas.
Objetivo del estudio:
- Investigar las implicaciones geológicas del terremoto de Landers.
- Analizar el patrón de la actividad sísmica reciente en el Mojave central.
- Determinar si está surgiendo una nueva falla de paso.
Principales métodos:
- Análisis de epicentros de terremotos y direcciones de deslizamiento.
- Cartografía geológica de los sistemas de fallas en la región de Mojave.
- Evaluación de los campos de tensión regionales y orientación de fallas.
Principales resultados:
- Se identificó una alineación de 100 km de epicentros y direcciones de deslizamiento que corren N15 ° W.
- Esta alineación sugiere una falla geológicamente joven y permanente.
- La nueva falla puede estar reemplazando a las fallas de deslizamiento de huelga más antiguas.
Conclusiones:
- El patrón sísmico observado indica un sistema de fallas naciente en el Mojave.
- Las fallas más antiguas, incluyendo potencialmente la curva de la falla de San Andrés, pueden estar perdiendo eficacia.
- La reorientación de la falla en relación con el campo de tensión es un factor clave en la deformación de la corteza.
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