Application of Time Series INSAR (SBAS) Method Using Sentinel-1 for Monitoring Ground Deformation of the Aegina Island (Western Edge of Hellenic Volcanic Arc)

Ioanna-Efstathia Kalavrezou, Ignacio Castro-Melgar, Dimitra Nika, Theodoros Gatsios, Spyros Lalechos and Issaak Parcharidis ()
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Ioanna-Efstathia Kalavrezou: Department of Geography, Harokopio University, 176 76 Athens, Greece
Ignacio Castro-Melgar: Department of Geography, Harokopio University, 176 76 Athens, Greece
Dimitra Nika: School of Rural, Surveying and Geoinformatics Engineering, National Technical University of Athens, 157 80 Athens, Greece
Theodoros Gatsios: Department of Geography, Harokopio University, 176 76 Athens, Greece
Spyros Lalechos: Earthquake Planning & Protection Organization of Greece, 154 51 Athens, Greece
Issaak Parcharidis: Department of Geography, Harokopio University, 176 76 Athens, Greece

Land, 2024, vol. 13, issue 4, 1-16

Abstract: This study employs advanced synthetic aperture radar (SAR) techniques, specifically the small baseline subset (SBAS) method, to analyze ground deformation dynamics on Aegina, a volcanic island within the Hellenic Volcanic Arc. Using Sentinel-1 satellite data spanning January 2016 to May 2023, this research reveals different deformation behaviors. The towns of Aegina and Saint Marina portray regions of stability, contrasting with central areas exhibiting subsidence rates of up to 1 cm/year. The absence of deformation consistent with volcanic activity on Aegina Island aligns with geological records and limited seismic activity, attributing the observed subsidence processes to settlement phenomena from past volcanic events and regional geothermal activity. These findings reinforce the need for continuous monitoring of the volcanic islands located in the Hellenic Volcanic Arc, providing important insights for local risk management, and contributing to our broader understanding of geodynamic and volcanic processes.

Keywords: volcanic risk; ground deformation; SBAS method; Sentinel-1; Aegina Island; Hellenic Volcanic Arc (search for similar items in EconPapers)
JEL-codes: Q15 Q2 Q24 Q28 Q5 R14 R52 (search for similar items in EconPapers)
Date: 2024
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