NEMO-SN1 Abyssal Cabled Observatory in the Western Ionian Sea

The “NEutrino Mediterranean Observatory - Submarine Network 1” (NEMO-SN1) seafloor observatory is located in the central
Mediterranean Sea, Western Ionian Sea, off Eastern Sicily (Southern Italy) at 2100 m water depth, 25 km from the harbour of the city of Catania. It is a prototype of a cabled deep-sea multiparameter observatory and the first one operating with real-time data transmission in Europe since 2005. NEMO-SN1 is also the first-established node of the “European Multidisciplinary Seafloor and water column Observatory” (EMSO, http://www.emso-eu.org), one of the incoming European large-scale research infrastructures included in the Roadmap of the “European Strategy Forum on Research Infrastructures” (ESFRI, http://cordis.europa.eu/esfri/roadmap.htm)
since 2006. EMSO will specifically address long-term monitoring of environmental processes related to Marine Ecosystems, Climate Change and Geo-hazards. NEMO-SN1 has been deployed and developed over the last decade thanks to Italian funding and to the EC project “European Seas Observatory NETwork - Network of Excellence” (ESONET-NoE, 2007-2011) that funded the “Listening to the Deep Ocean - Demonstration Mission” (LIDO-DM) and a technological interoperability test (http://www.esonet-emso.org/). NEMOSN1 is performing geophysical and environmental long-term monitoring by acquiring seismological, geomagnetic, gravimetric, accelerometric, physico-oceanographic, hydroacoustic, bio-acoustic measurements. Scientific objectives include studying seismic signals,
tsunami generation and warnings, its hydroacoustic precursors, and ambient noise characterisation in terms of marine mammal sounds, environmental and anthropogenic sources. NEMO-SN1 is also an important test-site for the construction of the “Kilometre-Cube Underwater Neutrino Telescope” (KM3NeT, http://www.km3net.org/), another large-scale research infrastructure included in the ESFRI Roadmap based on a large volume neutrino telescope. The description of the observatory and its most recent implementations is presented. On 9th June, 2012 NEMO-SN1 was successfully deployed and is working in real-time.

[1] P. Favali, L. Beranzoli, G. D’Anna, F. Gasparoni and H.W. Gerber, “NEMO-SN-1 The 1st “Real-Time” Seafloor
Observatory of ESONET”, Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers,
Detectors and Associated Equipment, vol 567, n. 2, pp. 462-467, 2006a (doi: 10.1016/j.nima.2006.05.255)
[2] P. Favali, L. Beranzoli, F. Italiano, E. Migneco, M. Musumeci and R. Papaleo. “NEMO-SN1 observatory developments in
view of the European Research Infrastructures EMSO and KM3NeT”, Nuclear Instruments and Methods in Physics
Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, vol. 626-627, pp. S53-S56, 2011
(doi:10.1016/j.nima.2010.04.139)
[3] L. Beranzoli, A. De Santis, G. Etiope, P. Favali, F. Frugoni, G. Smriglio, F. Gasparoni and A. Marigo, “GEOSTAR: a
Geophysical and Oceanographic Station for Abyssal Research”, Phys. Earth Planet. Int., vol. 108, n. 2, pp. 175-183, 1998
[4] P. Favali, L. Beranzoli, G. D’Anna, F. Gasparoni, J. Marvaldi, G. Clauss, H.W. Gerber, M. Nicot, M.P. Marani, F. Gamberi,
C. Millot and E.R. Flueh, “A fleet of multiparameter observatories for geophysical and environmental monitoring at
seafloor”, Ann. Geophys., vol. 49, n. 2-3, pp. 659-680, 2006b [5] P. Favali and L. Beranzoli, “EMSO: European Multidisciplinary Seafloor Observatory”, Nuclear Instruments and Methods
in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, vol. 602, pp. 21-27,
2009 (doi: 10.1016/j.nima.2008.12.214)
[6] H.W. Gerber and G. Clauss, “Development and operational optimization of MODUS, the GEOSTAR subsea docking
system”, Proceedings of OMAE2001 Conference, 2001 , Rio de Janeiro, Brazil
[7] D. Embriaco, G. Giovanetti and G. Marinaro, “Geophysical Data Acquisition and Transmission for the SN1 observatory to
be deployed off shore Catania”, INGV Technical Reports, n. 142, 2010 (http://www.earth-prints.org/handle/2122/6818)
[8] M.P. Marani, F. Gamberi, G. Bortoluzzi, G. Carrara, M. Ligi and D. Penitenti, “Seafloor bathymetry of the Ionian Sea”, in:
M.P. Marani, F. Gamberi and E. Bonatti (Eds.), From seafloor to deep mantle: architecture of the Tyrrhenian backarc basin,
Mem. Descr. Carata Geol. d’It,vol. LXIV, 2004.
[9] F. Chierici, L. Pignagnoli and D. Embriaco, “Modelling of the hydroacoustic signal and tsunami wave generated by
seafloor motion including a porous seabed”, J. Geophys. Res.,vol. 115, C03015, 2010 (doi:10.1029/2009JC005522, 2010)
[10] H. Toh, K. Satake, Y. Hamano, Y. Fujii and T. Goto, “Tsunami signals from the 2006 and 2007 Kuril earthquakes detected at a
seafloor geomagnetic observatory”, J. Geophys. Res., vol. 116, B0210, 2011 (doi:10.1029/2010JB00787)
[11] P. Favali, R. Person, C.R. Barnes, Y. Kaneda, J.R. Delaney, S.-K. Hsu, “Seafloor Observatory Science”, in: J. Hall, D.E.
Harrison and D. Stammer (Eds.), Proceedings of the OceanObs’09: Sustained Ocean Observations and Information for
Society (vol. 2), 2010, ESA Publication WPP-306
[12] U.F. Katz, “Status of the KM3NeT project”, Nuclear Instruments and Methods in Physics Research Section A: Accelerators,
Spectrometers, Detectors and Associated Equipment, vol. 602, pp. 40-46, 2009 (doi: 10.1016/j.nima.2008.12.214)
[13] H.A. Ruhl, M. André, L. Beranzoli, N.M. Çağatay, A. Colaço, M. Cannat, J.J. Dañobeitia, P. Favali, L. Géli, M. Gillooly, J.
Greinert, P.O.J. Hall, R. Huber, J. Karstensenm, R.S. Lampitt, K.E. Larkin, V. Likousis, J. Mienert, J.M. Miranda, R.
Person, I.G. Priede, I. Puillat, L. Thomsen and C. Waldmann, “Societal need for improved understanding of climate change,
anthropogenic impacts, and geo-hazard warning drive development of ocean observatories in European Seas”, Progress in
Oceanography, vol. 91, 1pp. -33, 2011 (doi:10.1016/j.pocean.2011.05.001)
[14] T. Sgroi, L. Beranzoli, G. Di Grazia, A. Ursino and P. Favali, “New observations of local seismicity by the SN-1 seafloor
observatory in the Ionian Sea, off-shore Eastern Sicily (Italy)”, Geophys. J. Int., vol. 169, n. 2, pp. 490-501, 2007 (doi:
10.1111/j.1365-246X.2007.03348.x)
[15] E. Boschi, E. Guidoboni, G. Ferrari, G. Valensise and P. Gasperini, “Catalogue of the strong earthquakes in Italy from 461
BC to 1990”, pp. 973, 1997, ING. and SGA, Bologna
[16] S. Tinti, A. Maramai and L. Graziani, “The new catalogue of Italian Tsunamis”, Nat. Hazards, vol. 33, pp. 439-465, 2004 [17] S. Monna, F. Frugoni, C. Montuori, L. Beranzoli and P. Favali, “High quality seismological recordings from the SN1 deep
seafloor observatory in the Mt. Etna region”, Geophys. Res. Lett., vol. 32, L07303, 2005 (doi:10.1029/2004GL021975)
[18] G. Nolet, “Seismic wave propagation and seismic tomography”, in: G. Nolet (Ed.), Seismic tomography with applications
in global seismology and exploration geophysics, pp. 1-23, 1987, Reidel Publishing Company, Dordrecht, The Netherlands
[19] R. Banks, ”Geomagnetic deep sounding”, in: D. Gubbins and E. Herrero-Bervera (Eds.), Encyclopedia of Geomagnetism
and Paleomagnetism, pp. 307-310, 2007, Springer, Dordrecht, The Netherlands
[20] G. Budillon, N. Lo Bue, G. Siena and G. Spezie, “Hydrographic characteristics of water masses and circulation in the
Northern Ionian Sea”, Deep Sea Res. II, vol. 57, n. 5-6, pp. 441-457, 2010 (doi: 10.1016/j.dsr2.2009.08.017)
[21] G. Riccobene for the NEMO Collaboration, “Long-term measurements of acoustic background noise in very deep sea”,
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated
Equipment, vol. A604, pp. 149-157, 2009 (doi: 10.1016/j.nima.2009.03.195)
[22] R. Reeves and G. Notarbartolo di Sciara, “The status and distribution of cetaceans in the Black Sea and Mediterranean
Sea”, IUCN Centre for Mediterranean Cooperation, vol. 1, pp. 137, 2006, Malaga, Spain
[23] G. Pavan, F. Zardin, E. Pirotta and G. Riccobene, “A Long-Term Passive Acoustic Monitoring of Sperm Whales”, Aquatic
Conservation: Marine and Freshwater Ecosystems, Special issue, 2012 (submitted)
[24] G. Pavan, C. Fossati, M. Priano and M. Manghi, “Acoustic detection of Cuvier’s beaked whales (Ziphius cavirostris)”, in: S.
Dolman, C. McLeod and P.G.H. Evans (Eds.), Proceedings of the Workshop “Beaked Whale Research”, ECS Special
Publication Series,vol. 51, pp. 31-35, 2009
[25] H. Mikada, H. Matsumoto, T. Watanabe, K. Kawaguchi, K. Mitsuzawa, K. Asakawa, T. Goto, T. Kasaya, R. Otsuka and S.
Morita, “Seismological Findings Using Real-Time Cabled Observatories”, Proceedings of IEEE 4th International Workshop
on Scientific se of Submarine Cables & Related Technologies (SSC’06), Dublin, 2006
[26] M.A. Nosov and S.V. Kolesov, “Elastic oscillations of water column in the 2003 Tokachi-Oki tsunami source: In-situ
measurements and 3-D numerical modelling”, Nat. Hazards Earth Syst. Sci., vol. 7, pp. 243-249, 2007
[27] F. Chierici, L. Beranzoli, D. Embriaco, P. Favali, G. Marinaro, S. Monna, L. Pignagnoli, N. Zitellini, F. Bruni, F. Furlan
and F. Gasparoni, “An innovative tsunami detector operating in tsunami generation environment”, American Geophysical
Union, Fall Meeting 2007 (abstract)
[28] E. Migneco, S. Aiello, A. Aloisio, F. Ameli, I. Amore, M. Anghinolfi, A. Anzalone, G. Barbarino, E. Barbarito, M.
Battaglieri, M. Bazzotti, R. Bellotti, A. Bersani, N. Beverini, S. Biagil, M. Bonori, B. Bouhdaef, M. Brescia, G. Cacopardo,
C. Calì, A. Capone, L. Caponettom, G. Carminatil, B. Cassano, E. Castorina, A. Ceres, T. Chiarusi, M. Circella, R.
Cocimano, R. Coniglione, M. Cordelli, M. Costa, A. D’Amico, C. D’Amato, V. D’Amato, G. De Bonis, G. De Rosa, G. De Ruvo, R. De Vita, C. Distefano, E. Falchini, V. Flaminio, K. Fratini, A. Gabrielli, S. Galeotti, E. Gandolfi, G. Giacomelli, F.
Giorgi, G. Giovanetti, A. Grimaldi, A. Grmek, R. Habel, E. Leonora, A. Lonardo, G. Longo, D. Lo Presti, F. Lucarelli, L.
Maccione, A. Margiotta, A. Martini, R. Masullo, F. Maugeri, R. Megna, S. Minutoli, M. Mongelli, T. Montaruli, M.
Morganti, P. Musico, M. Musumeci, C.A. Nicolau, A. Orlando, M. Osipenko, G. Osteria, R. Papaleo, V. Pappalardo, C.
Petta, P. Piattelli, D. Piombo, G. Raia, N. Randazzo, S. Reito, G. Ricco, G. Riccobene, M. Ripani, A. Rovelli, M. Ruppi,
G.V. Russo, S. Russo, P: Sapienza, M. Sedita, E. Shirokov, F. Simeone, V. Sipala, C. Sollima, F. Speziale, M. Spurio, M.
Taiuti, G. Terreni, L. Trasatti, S. Urso, V. Valente, M. Vecchi, P. Vicini and R. Wischnewski, “Status of the NEMO
project”, Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and
Associated Equipment, vol. A588, pp. 111-118, 2008
[29] A. Aloisio, F. Ameli, A. D'Amico, R. Giordano, V. Izzo and F. Simeone, “The NEMO experiment data acquisition and
timing distribution systems”, IEEE Nuclear Science Symposium and Medical Imaging Conference, pp. 147-152, 2011
(doi:10.1109/NSSMIC.2011.6154468), (http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=6154468)