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Elevación aseísmica en el sur de California: una interpretación alternativa
Science (New York, N.Y.)
|October 31, 1980
Resumen
El levantamiento del sur de California reportado anteriormente puede deberse a errores de nivelación, no a actividad tectónica. Los datos corregidos revelan un movimiento vertical mínimo, excepto durante el terremoto de San Fernando.
Área de la Ciencia:
- La geodesia es una técnica de geodesia.
- La geofísica es la geofísica.
- La tectónica es la tectónica.
Sus antecedentes:
- Estudios previos sugirieron una elevación tectónica significativa en el sur de California.
- Las mediciones geodésicas son cruciales para comprender la deformación de la corteza.
Objetivo del estudio:
- Para reevaluar los datos de nivelación vertical de tierras del sur de California.
- Para determinar si la elevación observada es tectónica o se debe a errores sistemáticos.
Principales métodos:
- Análisis de los cambios de elevación correlacionados con la topografía en varias longitudes de onda.
- Identificación de posibles fuentes de error en las encuestas de nivelación.
Principales resultados:
- Una fuerte correlación entre los cambios de altitud y la topografía sugiere errores sistemáticos.
- Los datos geodésicos corregidos no muestran ningún movimiento vertical significativo, aparte del terremoto de San Fernando.
- La calibración inadecuada de la varilla y la refracción atmosférica se identifican como fuentes potenciales de error.
Conclusiones:
- El levantamiento tectónico previamente reportado en el sur de California es probablemente un artefacto de errores sistemáticos de nivelación.
- Las mediciones geodésicas requieren una cuidadosa evaluación de errores para interpretar con precisión las señales tectónicas.
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