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Diverse deformation patterns of Aleutian volcanoes from interferometric synthetic aperture radar (InSAR)

Zhong Lu(1), Dzurisin Dan(1), Chuck Wicks(2) and John Power(3)

(1) US Geological Survey, Cascades Volcano Observatory, Vancouver, WA 98683, United States
(2) US Geological Survey, Earthquake and Volcano Hazards Program, Menlo Park, CA, United States
(3) US Geological Survey, Alaska Volcano Observatory, Anchorage, AK, United States

Abstract

With its global coverage and all-weather imaging capability, interferometric synthetic aperture radar (InSAR) has become an increasingly important measurement technique for constraining magma dynamics of volcanoes over remote regions such as the Aleutian Islands. The spatial distribution of surface deformation data derived from InSAR images enables the construction of detailed mechanical models to enhance the study of magmatic processes. This paper summarizes the diverse deformation patterns of the Aleutian volcanoes observed with InSAR images acquired from European ERS-1, ERS-2 and Envisat, Canadian Radarsat-1, and Japanese JERS-1 and ALOS satellites. The presentation will emphasize multi-temporal, multi-satellite InSAR image analysis and modeling to infer magma plumbing systems for volcanoes with different geological and tectonic settings, demonstrating that deformation patterns and associated magma supply mechanisms in the Aleutians are diverse and vary between volcanoes. These findings provide an improved understanding of magmatic plumbing systems in the Aleutians.

 

Workshop presentation

Keywords: ESA European Space Agency - Agence spatiale europeenne, observation de la terre, earth observation, satellite remote sensing, teledetection, geophysique, altimetrie, radar, chimique atmospherique, geophysics, altimetry, radar, atmospheric chemistry