Due to their broad variety of phenomena, active volcanoes are quite different from other geological environments. The relevant data needs to be characterized and organized according to specific approaches and exploiting the experience of a large volcanological community. Creating a link between EPOS and EUROVOLC European projects, the Volcano Observations (VO) Gateway aims to overcome the fragmentation of the volcanological community and the widely distributed infrastructures by developing dynamic connections and collaborations within the community and between the community and its stakeholders. The gateway deals with European Volcanoes and it is a collector and a distributor of heterogeneous environmental parameters. It proposes a unique access point for volcanological data, data products, services and software.