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Migración de fluidos debajo de la caldera de Yellowstone inferida por interferometría de radar por satélite
1C. Wicks Jr. and W. Thatcher, U.S. Geological Survey (USGS), MS 977, Menlo Park, CA 94025, USA. D. Dzurisin, USGS, Cascades Volcano Observatory, 5400 MacArthur Boulevard, Vancouver, WA 98661, USA.
Science (New York, N.Y.)
|October 17, 1998
Resumen
La deformación de la caldera de Yellowstone fue monitoreada usando radar satelital. La subsidencia y la inflación sugieren el movimiento de fluidos debajo de la superficie, lo que indica procesos geológicos dinámicos dentro de la caldera.
Área de la Ciencia:
- La geofísica es la geofísica.
- La detección remota con sensores.
- Volcanología Volcanología.
Sus antecedentes:
- La caldera de Yellowstone es una gran caldera volcánica que cubre aproximadamente 3000 kilómetros cuadrados.
- Comprender los patrones de deformación es crucial para evaluar la actividad volcánica.
Objetivo del estudio:
- Para monitorear año tras año la deformación del suelo en toda la caldera de Yellowstone.
- Para investigar la migración espacial y temporal de los eventos de deformación.
Principales métodos:
- Utilizó el radar de apertura sintética interferométrico por satélite (InSAR) para el monitoreo integral de la caldera.
- Interferogramas secuenciales analizados desde agosto de 1992 hasta junio de 1997.
Principales resultados:
- Migración observada de hundimiento de una cúpula resurgente a otra entre 1992 y 1995.
- Se detectó inflación cerca de la cúpula noreste (1995-1996) seguida de un levantamiento de la cúpula suroeste (1996-1997).
Conclusiones:
- Los patrones de deformación son consistentes con la migración de fluidos (hidrotermales o magmáticos).
- Se infiere que el movimiento de fluidos ocurre dentro de dos cuerpos similares a umbrales aproximadamente a 8 km debajo de la caldera.
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