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Summary of Proposal GEO1179

TitleIntegration between SAR Interferometry and Ground-Based Geodetic Data on Mt. Etna Supersite Using TerraSAR-X Data
Investigator Puglisi, Giuseppe - Istituto Nazio. di Geofisica e Vulcanologia, Sez. di Catania, Osservatorio Etneo
Team Member
Dr. Stramondo, Salvatore - Istituto Nazionale di Geofisica e Vulcanologia, Centro Nazionale Terremoti
Dr. Hooper, Andy - Delft University of Technology, Delft Institute of Earth Observation and Space Systems
Dr. Tiampo, Kristy - University of Western Ontario, Department of Earth Sciences
Dr. FernŠndez, Josť - CSIC-UCM, Institito de Geociencias
Dr. Guglielmino, Giuseppe - Istituto Nazionale di Geofisica e Vulcanologia, Istituto Nazionale di Geofisica e Vulcanologia
Dr. Puglisi, Giuseppe - Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Catania - Osservatorio Etneo
SummaryOne of the main aims of the Supersite initiative, implemented in the frame of GEO Strategic Plan, is the integration between the satellite-based and ground-based geohazard observations, in order to improve the disaster preparedness by using the full spectrum of the geophysical data sets. Considering the ground deformations monitoring, interferometric analysis of SAR images and geodetic data are the most suitable data for improving the knowledge about the state of the strain of the Earth crust. Mt. Etna is a volcano Supersite candidate, particularly advisable for applying the above criteria of the Supersite initiative, owing its specific features: the almost continuous volcanic activity, which produces a wide spectrum of signals, the cutting-edge multi-disciplinary monitoring system managed by INGV, including geodetic (GPS, tilt strainmeters) networks, and the large number of people living around this volcano. Lava flows and strong explosive activity, producing volcanic plumes, indeed, represent the main threats for the approximately one million people living around Mt. Etna, as well as for air traffic (due the presence of three important airports around this volcano). These threats create a requirement for continuous updating of the monitoring system of the volcano, which currently is based both on ground and space based techniques. Permanent seismic, geodetic, geochemistry and video-camera (visible and IR) networks, satellite data, together with the field surveys (geologic, geodetic and geochemical) and laboratory activity represent the backbone of the monitoring system managed by INGV. Throughout the last decades, space-based techniques, in the form of thermal and optical imaging and radar interferometry, have become increasingly used to enhance the monitoring system, although the frequency of the observations has often been insufficient to fit the needs of civil protection. These techniques are fundamental for monitoring important threats, such as the volcanic plumes and the active lava flows, and to monitor the evolution of the dynamic of the volcano for evaluating the possibility of an impending eruption. In this project we propose to integrate interferometric SAR deformation maps and ground-based displacement data by using a new method (SISTEM) to produce high resolution three dimensional ground deformation maps over the whole investigated area. Here we propose to exploit the images acquired from Mt. Etna, Italy, in order to better evaluate the capabilities of this integration technique. With the TerraSAR-X satellite passing over Etna 4 times every 11 days, we are at the stage where radar imaging approaches the optimal time interval for the monitoring of volcanoes. In order to utilise radar data in a timely way, we propose to develop advanced algorithms to process large quantities of data in a near real-time manner, going from raw radar data to models of magma movement. The new algorithms will incorporate novel approaches to processing that will also improve the accuracy and reliability of the results. Thus an extra benefit will be the production of an extensive archive of deformation data that will contribute to addressing questions on magma dynamics. This proposal takes advantage of TerraSAR-X data tasked by a related proposal (GEO0891) established as part of the Group of Earth Observation (GEO) Supersites initiative for natural hazards.

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