Publication: Deformación volcánica durante etapas inter-eruptivas : Three Sisters (Cordillera de las Cascadas, EE.UU) como caso de estudio
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2022-11-25
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Universidad Complutense de Madrid
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Abstract
La gran mayoría de erupciones volcánicas están precedidas por procesos de reactivación que pueden ser detectados sobre la superficie terrestre. Por tanto, la interpretación de estos signos de reactivación es esencial para el pronóstico de eventos volcánicos. En zonas volcánicas, esta vigilancia se lleva a cabo a través de la monitorización de deformaciones, mediante el uso de técnicas geodésicas espaciales como los Sistemas de Navegación Global por Satélite(GNSS) y la Interferometría Radar de Apertura Sintética (InSAR). La interpretación de señales de reactivación requiere el uso de modelos físico-matemáticos, los cuales permiten obtener la localización, geometría y cambios de volumen puntuales de distintas zonas de acumulación de magma, así como la posible dinámica de los mecanismos físicos implicados. El complejo volcánico Three Sisters (Cordillera de las Cascadas, EEUU), del cual nos ocupamos en esta tesis doctoral, es un buen ejemplo de un sistema de estratovolcanes con levantamiento inter-eruptivo monótono de larga duración sin actividad eruptiva asociada ni sismicidad significativa, que presenta un levantamiento activo del terreno desde el año 1996hasta nuestros días. La posibilidad de futuras erupciones similares a las ocurridas hace 2000años en la zona de South Sister, representan una clara amenaza para las poblaciones cercanas...
Most volcanic eruptions are preceded by reactivation processes that can be observed on the earth’s surface. Therefore, the interpretation of these signs of reactivation is essential for the forecasting of volcanic events. In volcanic areas, this surveillance is carried out through the monitoring of deformations, using spatial geodetic techniques such as the Global Satellite Navigation Systems (GNSS) and the Synthetic Aperture Radar Interferometry (InSAR). The interpretation of reactivation signals requires the use of physical-mathematical models, which allow obtaining the location, geometry and specific volume changes of different areas of magma accumulation, as well as establishing the possible dynamics of the physical mechanisms involved.The Three Sisters volcanic complex (Cascade Range, USA), which we dealt with in this Doctoral Thesis, is a good example of a system with long lasting monotonous inter-eruptive uplift without associated eruptive activity or significant seismicity. It presents an active uplift from the year 1996 to nowadays. The possibility of future eruptions similar to those that occurred 2000 years ago in the South Sisters area represent a clear threat to nearby populations...
Most volcanic eruptions are preceded by reactivation processes that can be observed on the earth’s surface. Therefore, the interpretation of these signs of reactivation is essential for the forecasting of volcanic events. In volcanic areas, this surveillance is carried out through the monitoring of deformations, using spatial geodetic techniques such as the Global Satellite Navigation Systems (GNSS) and the Synthetic Aperture Radar Interferometry (InSAR). The interpretation of reactivation signals requires the use of physical-mathematical models, which allow obtaining the location, geometry and specific volume changes of different areas of magma accumulation, as well as establishing the possible dynamics of the physical mechanisms involved.The Three Sisters volcanic complex (Cascade Range, USA), which we dealt with in this Doctoral Thesis, is a good example of a system with long lasting monotonous inter-eruptive uplift without associated eruptive activity or significant seismicity. It presents an active uplift from the year 1996 to nowadays. The possibility of future eruptions similar to those that occurred 2000 years ago in the South Sisters area represent a clear threat to nearby populations...
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Tesis inédita de la Universidad Complutense de Madrid, Facultad de Ciencias Físicas, leída el 25-03-2022