Geohazards Revealed by Multi-temporal InSAR Datasets at AGEO Citizen Science Observatory Pilots in Lisbon, Madeira and Northern Ireland

Ground motion analysis using multi-temporal InSAR data from Copernicus Sentinel-1 satellites reveals significant geohazards across three UNESCO World Heritage Sites: the Lisbon Region, eastern Madeira Island, and Northern Ireland's Giant's Causeway and Causeway Coast. The study identifies subsidence hotspots in Lisbon (up to -5 mm/yr) linked to groundwater over-pumping and urbanization, while Madeira shows ground motions of up to 7 mm/yr associated with slow landslides. In Northern Ireland, peatland drainage and urban-induced consolidation contribute to subsidence, including around the Causeway coast. These findings align with the European Ground Motion Service (EGMS), providing critical insights for Citizen Observatories to focus on high-risk areas. The research underscores the potential of InSAR-derived data to contextualize citizen science efforts in geohazard monitoring.

Hrysiewicz, A., Wang, X., Holohan, E. P., Falcão, A. P., Rodrigues, D., Parker, K., Mangina, E., & Gomes, R. C. (2025). Geohazards Revealed by Multi-temporal InSAR Datasets at AGEO Citizen Science Observatory Pilots in Lisbon, Madeira and Northern Ireland. Citizens’ Observatories on Geohazards, 69–84. https://doi.org/10.1007/978-3-031-53371-6_5