International audienceThis paper presents the results of an interdisciplinary researchprogramme combining sociology and geology. Our analysis focuses on urban vulnerability in relation to theerosion of coastal cliffs. The study area centres on the coastal fringe of the town of Carry-le-Rouet (CLR).Geological observations were conducted from the regional scale (diachronic comparison of aerialorthophotos) down to the city level (Data Catalog “historical events” identified by visual observation andinnovative scan Laser acquisition). The sociological survey, focussed on the town of CLR, combines 43interviews and 125 questionnaires conducted with decision makers, professionals and residents. Theanalysis showed that the wealthiest neighbourhoods ...