Fishing shelters are among the critical infrastructures that necessitate continuous monitoring to ensure their functionality and safety in Cyprus. Currently, Cyprus hosts sixteen (16) operational fishing shelters, covering the coastline. In the last few decades, Advanced Interferometric SAR techniques have been the most effective methods for concurrent monitoring critical infrastructures. The current study investigates the potential of the A-InSAR techniques to identify displacements of the fishing shelters in Cyprus. Following various discussion with the relevant stakeholders, the Agios Georgios Pegeias fishing shelter in Paphos was selected as the pilot study for further investigation. The satellite dataset consists of 148 Copernicus Sentinel-1A in descending mode, covering a time span of 2019-2023, achieving comprehensive and cost-free monitoring. The PSI technique was carried out using the freely available snap2stamps and StaMPS toolboxes, as well as the Matlab and ArcGIS Pro commercial software. The results of this study presented a slight displacement of about -5 mm/year at the edge of the fishing shelter, while the broader area remains stable. The displacement rates are referred to the LoS and they are visualized in GIS environment.
Turkey due to its location within the collision zone between the Eurasian, African and Arabian Plates, is a region prone to earthquakes. The country mostly lies on the Anatolian micro-plate, bounded by two major strike-slip fault zones, i.e., the North and the East Anatolian Fault. On 6 February 2023, the activation of a large segment of the East Anatolian Fault generated two earthquakes of 7.8 and 7.5 magnitude, in southern Turkey. The seismic risk is greater along the plate boundaries, however due to the frequency of earthquake occurrence throughout Turkey, detailed seismic risk maps are crucial and need to be continuously updated towards operational purposes, and as the optimal means towards decision making for disaster risk reduction. Extensive Synthetic Aperture Radar (SAR) satellite image analysis was performed to determine ground displacements caused by the seismic sequence in the wider area around the two epicenters. Pre-seismic line of sight displacements, as well as co-seismic deformation, were estimated, providing critical information about the surface rupture and the overall ground deformation in the affected areas. Earthquakes can induce landslides and other ground displacements causing extensive damage to buildings and infrastructure. Therefore, optical (e.g., Sentinel-2, PlanetScope) and SAR (Sentinel-1) imagery were exploited as a useful tool for assessing the impact of earthquakes on the ground. The monitoring and mapping of these changes, in conjunction with SAR analysis, as well as information on building infrastructure and population density, highlight the overall damage assessment in the region, thus, allowing a better understanding of the impact of earthquakes while providing a more effective response and recovery efforts for decision makers and local authorities towards disaster risk reduction.
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