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Summary of Proposal GEO1986

TitleIntegrated monitoring of the Santorini Volcanic Complex (InSan)
Investigator Papoutsis, Ioannis - National Observatory of Athens, Institute for Space Applications and Remote Sensing
Team Member
Dr Charalampos , Kontoes - National Observatory of Athens, Institute for Astronomy, Astrophysics, Space Applications and Remote Sensing
Dr Ganas, Athanasios - National Observatory of Athens, Institute of Geodynamics
SummaryThe Santorini Volcanic Complex (SVC) islands have been showing signs of unrest for the first time in over half a century. Published results point to molten rock that has accumulated in a magma chamber at a depth of about 4 km. The concept of InSan is to apply a holistic approach for conducting cutting-edge research in monitoring the volcanic activity at SVC, exploiting the diversity of the available observational geodetic networks. Santorini is an ideal set-up for exploring the synergetic use of products generated from diverse SAR sensors, coupled with extensive measurements from cGPS and gravity data.
The focus of the project will lie in generating ground displacement maps, using as input multi-sensor SAR data and applying interferometric techniques. An integrated product will be validated using in-situ deformation data, from 11 permanent GPS stations that offer an exceptional spatial coverage of SVC. Additionally, correlations with gravity data and local seismicity records will be explored, aiming at enhancing our understanding for the physical processes that govern Santorini volcano.
The basic processing of the SAR imagery will be based on Persistent Scatter Interferometry, employing PSInSAR and SBAS using StaMPS and/or SARscape implementations. Hence, SAR time-series acquisitions (at least 60), in Stripmap mode, will be exploited, both ascending and descending tracks for deriving the three dimensional displacement rate vectors using sophisticated angle-diversity techniques.
A series of geophysical models will be tested for SVC, accounting for point pressure, elastic dislocations and penny-shaped cracks and risk assessment maps will be subsequently generated. To this end, InSan will deliver robust, validated and consolidated ground motion maps covering SVC and associated geophysical models.

InSan will have high impact to the scientific community (EO scientists, geophysicists and decision makers), since Santorini is a Candidate Supersite following its recent and ongoing activity and its significant cultural heritage. The seamless monitoring of the site is of paramount importance.

NOA activities will be funded in the framework of the BEYOND project a capacity building action, which aims to establish a Centre of Excellence for Earth Observation based monitoring of Natural Disasters in south-eastern Europe. Within this project the set-up of innovative integrated observational solutions to allow space-borne and ground-based networks to operate in a coordinated manner are foreseen, towards delivering multi-hazard downstream services to the society including geo-hazards.

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