Additional support was provided by We thank DEPAS (Deutsche Geräte-Pool für Amphibische Seismologie , Germany), GEOMAR (GEOMAR Helmholtz-Zentrum für Ozeanforschung Kiel, Germany) and INSU-IPGP (Institut National des Sciences de l'Univers -Institut de Physique du Globe de Paris, France) for providing the broad-band ocean-bottom seismometers (44 DEPAS, 4 GEOMAR, 9 INSU-IPGP). The RHUM-RUM data set) has been assigned the FDSN network code YV and is hosted and served by the French RESIF data centre (http://seismology.resif.fr) Data will be freely available by the end of 2017. We thank cruise participants and crew members on R/V Marion Dufresne, cruise MD192 and on R/V Meteor, cruise M101. We acknowledge support from/discussions within TIDES COST Action ES1401. We used the open-source toolboxes We are grateful to Martin Schimmel for providing his 'polfre' toolbox (v, Python v.2.7 Schimmel et al. 2011), and for his patience in answering our questions. This manuscript was greatly improved thanks to the suggestions of two anonymous reviewers, p.2015, 1995. ,
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