Ivan Rodero¹, Raul Bardaji², Stefano Chiappini^3,4, Jaume Piera⁵, Dominique Briand⁶, Raluca Radulescu⁷, Javier González⁸, Maria Sotiropoulou⁹, Paulo Relvas¹⁰, Thierry Carval¹¹, Helen M Snaith¹², Claudia Fratianni¹³, Maurice Libes¹⁴, Enoc Martinez¹⁵, Rob Thomas¹⁶, Paolo Favali^17,18 and Juanjo Danobeitia^4,19, (1)EMSO ERIC, CMO, Rome, Italy, (2)ICM-CSIC, Barcelona, Spain, (3)Istituto Nazionale di Geofisica e Vulcanologia, Rome, Italy, (4)EMSO ERIC, Rome, Italy, (5)ICM-CSIC, Department of Physical and Technological Oceanography, Barcelona, Spain, (6)IFREMER, Plouzané, France, (7)National Institute for Marine Geology and Geoecology - GeoEcoMar, Bucharest, Romania, (8)PLOCAN, Telde, Spain, (9)Hellenic Centre for Marine Research, Anavyssos, Greece, (10)CCMAR/University Algarve, Faro, Portugal, (11)IFREMER, Brest, France, (12)British Oceanographic Data Center, Liverpool, United Kingdom, (13)INGV, Bologna, Italy, (14)Institut Méditerranéen d'Océanologie, Marseille, France, (15)Universitat Politècnica de Catalunya, SARTI-MAR, Barcelona, Spain, (16)Irish Marine Institute, Galway, Ireland, (17)EMSO ERIC - European Multidisciplinary Seafloor and Water-Column Observatory, Rome, Italy, (18)Istituto Nazionale di Geofisica e Vulcanologia (INGV), Roma, Italy, (19)Spanish National Research Council, UTM-CSIC, Barcelona, Spain