| Resumo: | [EN] After floods, landslides are the most damaging geohazard in Spain regarding economic losses. In the Canary Islands, rockfalls and landslides are mainly triggered by meteorological phenomena, such as severe precipitations and wind, as well as dilation resulting from solar radiation. Understanding information such as location, frequency, event type, rock type, block size, rainfall or wind intensity contributes to a better understanding of the process, which is critical for performing hazard analyses to improve territory management and risk reduction. The Citizens’ Observatory on Rockfalls in the Canary Islands constitutes a tool that promotes citizen participation and seeks to empower society through citizens’ training, oriented towards reporting mass movements that have occurred in the regions where they live. Several data sources were handled in order to feed the Observatory with rockfall data and update the available mass movements inventories and contributing to complete the existing national database BDMOVES with mass movements data at regional scale. A wide range of communication actions were carried out. Citizen science is an excellent tool to obtain updated data to characterise the process in detail and thus estimate the hazard more accurately and improve the phases of prevention and mitigation.
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