OBS

Four INGV designed OBS were deployed on the lineament Stromboli-Marsili; one of these was deployed on top on the Marsili Smt., to monitor the seismic and volcanic activity. The other OBS was deployed N of the Alicudi I., aiming at obtaining earthquake data for improving quality of focal solutions in the Western Eolian Sector. All the five OBS were also deployed for the MEDOC seismic shooting operations (120 L, 90 s interval), that occured April-May 2010 with the spanish R/V Sarmiento de Gamboa (Ranero, Zitellini et al., cruise report in preparation).

During shooting of E-W transect Sardinia to Italy at 40N , the INGV stations located in Lipari, Ustica and Alicudi and were able to receive signals, therefore we may be confident that the OBS's were illuminated as well by the shots (Figs. A5, A6 and A7 in the Appendix C).

Among the others OBS A7 (Fig. A4 was dropped on the depression ($\sim$ 785-790 m) just SSW of the summit of the Marsili Smt., $\sim$ 60 m to the NNE of the deployment of the MRS06 cruise also MRS06-REP).