Advances in Natural Hazards and Geotechnical Risks: Designing Resilient Solutions With Sustainability: Proceedings of the 4th International Workshop on Natural Hazards (NATHAZ'25), Faial Island-Azores 2025

This volume presents the selected proceedings of the 4th International Workshop on Natural Hazards (NATHAZ'25), held in Horta, Faial Island, Azores, on 23-24 October 2025. It serves as a key reference for researchers and practitioners in earth sciences, geohazards, geotechnics, engineering geosciences, georesources, and environmental sciences. Horta, a scenic Atlantic city overlooking Pico Mountain (2,351 m), is located on Faial Island, renowned for its striking natural landscapes and rural charm. The 1957-1958 Capelinhos eruption shaped a distinctive volcanic landscape that continues to serve as an important site for scientific research and public engagement.

Natural hazards threaten communities, ecosystems, and infrastructure, requiring integrated approaches that combine geology, geomorphology, hydrology, geoengineering, environmental sciences, and social sciences. Advancing hazard mapping, georisk assessment, monitoring, and multi‑hazard management and planning is essential to strengthen resilience and reduce risk.

This volume presents recent advances in geotechnical risk assessment and natural‑hazard studies, with contributions on hazard characterization, modelling, evaluation, and management. Case studies from Europe, the Americas, Asia, and the Atlantic and Mediterranean islands offer broad insights into geohazards and multi‑hazard systems. An international scientific committee ensures the volume's overall rigor and multidisciplinary scope.

Key topics include:

i. Multi‐hazards and georisks assessment: geoscience, geoengineering, and societal issues

ii. Mapping, monitoring, and evaluating natural hazards: landslides, rock falls, and slopes

iii. Ground evaluation and environmental geotechnics: implications on geotechnical hazards

iv. Assessment, planning, and design with natural hazards: urban planning, engineering works, and hydrological issues

v. Faial Island geology: geodiversity and natural hazards