Anke Dannowski¹, Heidrun Kopp^1,2, Ingo Grevemeyer¹, Dietrich Lange¹, Martin Thorwart³, Wayne Crawford⁴, Grazia Caielli⁵, Roberto de Franco⁵, Anne Paul⁶, Felix Noah Wolf¹, Florian Petersen¹, Bettina Schramm¹ and AlpArray Working Group, (1)GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany, (2)University of Kiel, Kiel, Germany, (3)Christian-Albrechts-Universität zu Kiel, Kiel, Germany, (4)Institut de Physique du Globe de Paris, Paris, France, (5)CNR Institute for the Dynamics of Environmental Processes, Milan, Italy, (6)Univ. Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, IRD, IFSTTAR, ISTerre, Grenoble, France