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Summary of Proposal GEO1454

TitleInSAR observations and modeling of Kilauea Volcano, Hawaii, using TerraSAR-X
Investigator Le Mevel, Helene - University of Wisconsin - Madison, Geoscience
Team Member
Prof. Feigl, Kurt - University of Wisconsin - Madison, Geoscience
Dr. Poland, Michael - USGS - HVO, Hawaiian Volcano Observatory
SummaryThe objective of the project is to use InSAR data from one of the most active volcanoes in the world to better model volcanic processes using GIPhT, as it offers an exceptional new tool for analyzing volcanic deformation. Kilauea is the best place to apply this technique, and TerraSAR-X is the best dataset to use with this method. We propose to focus on rheology -- the constitutive relations between stress and strain. A rheological experiment applies an impulse to a mechanical system and measures the response. By modeling the impulse (stress) and measuring the response (strain), and defining the constitutive relations between the two, we can infer the underlying physical processes. In the Earth, the response is crustal deformation that can be measured using interferometric synthetic aperture radar (InSAR). The known impulse is the net ejection (into the atmosphere during an eruption) or injection (from the mantle during an intrusion) of magma that causes subsidence (or uplift). We propose to perform such a rheological experiment at Kilauea. We will use all data that have been acquired since 2003 as part of the Hawaii supersite over Kilauea Volcano, allowing us to study both the summit caldera and the east rift zone sources of deformation.TerraSAR-X data are requested in StripMap mode as Single Look Slant Range Complex data. Regarding funding, the two institutions involved will cover the salary costs of the team. The required computational infrastructure is already in place. Additional funds will be requested in peer-reviewed proposals submitted to the U.S. National Science Foundation and the USGS. Deliverables include a minimum of one scientific article, annual reports to DLR, and presentations at international scientific conferences.

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