Skip to main content

Advertisement

You are viewing the new article page. Let us know what you think. Return to old version

Article | Open | Published:

MOISE: A pilot experiment towards long term sea-floor geophysical observatories

Abstract

We describe the scientific purposes and experimental set-up of an international deployment of a 3 component broadband seismometer package on the ocean floor in Monterey Bay which took place during the summer of 1997. Highlights of this experiment were the installation, performed using a remotely operated vehicle (ROV), the underwater connection of the different components of the package, and the successful retrieval of 3 months of broadband seismic and auxiliary data. Examples of recordings of teleseisms and regional earthquakes are presented and the background noise characteristics are discussed, in comparison with those of near-by broadband land sites, current-meter data from the vicinity of the ocean bottom package, as well as pressure data from deeper ocean sites.

References

  1. Beauduin, R., J.-P. Montagner, and J.-F. Karczewski, Time evolution of broadband seismic noise during the French Pilot experiment OFM/SISMOBS, Geophys. Res. Lett., 23, 2995–2998, 1996.

  2. COSOD II, Rep. 2nd Conf. Sci. Ocean Drilling, Strasbourg, France, (European Science Foundation), 1987.

  3. Duennebier, F. K. and G. H. Sutton, Fidelity of ocean bottom seismic observations, Marine Geophys. Res., 17, 535–555, 1995.

  4. Forsyth, D., A. Dziewonski, and B. Romanowicz, Scientific objectives and required instrumentation, in Proceedings of Ocean Seismic Network Workshop: Broadband Seismology in the Oceans: Towards a Five Year Plan, pp. 8–18, 1995.

  5. Montagner, J. P. and Y. Lancelot (eds.), Multidisciplinary observatories on the deep seafloor, in Report of International Ocean Network Workshop Held at Marseille, France, 01/11-01/13, 1995, INSU/CNRS, IFREMER, ODP-France, 1995.

  6. Montagner, J. P., B. Romanowicz, and J. F. Karczewski, A first step toward an oceanic geophysical observatory, EOS Trans. AGU, 75, 150–151, 1994a.

  7. Montagner, J. P., J. F. Karczewski, B. Romanowicz, S. Bouaricha, P. Lognonne, G. Roult, E. Stutzmann, J. L. Thirot, J. Brion, B. Dole, D. Fouassier, J.-C. Koenig, J. C. Savary, L. Floury, J. Dupond, A. Echardour, and H. Floc’h, The french pilot experiment OFM-SISMOBS: first scientific results on noise level and event detection, Phys. Earth Planet. Inter., 84, 321–336, 1994b.

  8. Montagner, J. P., P. Tarits, E. Stutzmann, J. L. Thirot, D. Stakes, B. Romanowicz, J. F. Karczewski, A. Dubreule, S. Etchemendy, K. Salamy, and D. Neuhauser, Preliminary results on the intercomparison of seismic and electromagnetic data from the MOISE experiment, EOS Trans. AGU, 78, F461, 1997.

  9. Orcutt, J. A. and R. A. Stephen, OSN seismograph system is underway, Seismic Waves, OSN Newsletter, JOI, Inc., Washington, 2, 3–5, 1993.

  10. Orcutt, J. A., C. S. Cox, A. C. Kibblewhite, W. A. Kuperman, and H. Schmidt, Observations and causes of ocean and seafloor noise at ultra-low and very-low frequencies, in Natural Physical Sources of Underwater Sound, edited by B. R. Kerman, pp. 203–232, 1993.

  11. Peterson, J. R., Observations and modeling of seismic background noise, U.S. Geological Survey Open File Report, 93–322, 94 pp., 1993.

  12. Purdy, M. (ed.), Broadband Seismology in the Oceans: towards a five year plan, in Report of Ocean Seismic Network Workshop, Joint Oceano-graphic Institutions, 1995.

  13. Purdy, G. M. and A. M. Dziewonski, Proc. Workshop on Broad-Band Downhole Seismometers in the Deep Ocean, Woods Hole, MA, Apr. 26–28, 1988, Joint Oceanogr. Inst. and U.S. Sci. Advisory Comm., 1989.

  14. Romanowicz, B. and A. M. Dziewonski, Towards a federation of broadband seismic networks, EOS Trans. AGU, 67, 541–542, 1986.

  15. Romanowicz, B., J. F. Karczewski, M. Cara, P. Bernard, J. Borsenberger, B. Dole, D. Fouassier, J. C. Koenig, M. Morand, R. Pillet, A. Pyrolley, and D. Rouland, The Geoscope program: present status and perspectives, Bull. Seism. Soc. Am., 81, 243–264, 1991.

  16. Romanowicz, B., D. Stakes, J. P. Montagner, R. Uhrhammer, M. Begnaud, E. Stutzmann, and M. Pasyanos, First results of data analysis from the MOISE experiment, EOS Trans. AGU, 78, F461, 1997.

  17. Stakes, D., B. Romanowicz, J. P. Montagner, P. Tarits, J. F. Karczewski, S. Etchemendy, P. McGill, D. Neuhauser, J.-C. Koenig, and J. Savary, The 1997 MOISE experiment at Monterey Bay, CA, EOS Trans. AGU, 78, F461, 1997.

  18. Stakes, D., B. Romanowicz, J. P. Montagner, P. Tarits, J. F. Karczewski, S. Etchemendy, D. Neuhauser, P. McGill, J.-C. Koenig, J. Savary, M. Begnaud, and M. Pasyanos, MOISE: Monterey Bay Ocean Bottom International Seismic Experiment, EOS Trans. AGU, 79, 301–309, 1998.

  19. Sutton, G. H. and N. Barstow, Ocean-bottom ultralowfrequency (ULF) seismoacoustic ambient noise: 0.002 to 0.4 Hz, J. Acoust. Soc. Am., 87, 2005–2012, 1990.

  20. Sutton, G. and F. Duennebier, Optimum design of ocean-bottom seismometers, Mar. Geophys. Res., 9, 47–65, 1988.

  21. Suyehiro, K., T. Kanazawa, N. Hirata, M. Shinohara, and H. Kinoshita, Broadband downhole digital seismometer experiment at site 794, Proc. O.D.P. 127/128, 1061–1073, 1992.

  22. Suyehiro, K., J. P. Montagner, A. M. Dziewonski, and B. Romanowicz, The International Ocean Network Structure, in Proceedings ION/ODP International Workshop, Multidisciplinary Observatories on the Deep Seafloor, Marseille, pp. 61–72, 1995.

  23. Webb, S. C., Long period acoustic and seismic measurements and ocean floor currents, IEEE, J. Oceanic Eng., 13, 263–270, 1988.

  24. Webb, S. C., Broadband seismology and noise under the ocean, Rev. Geophys. Space Phys., 36, 105–142, 1997.

  25. Webb, S. C., X. Zhang, and W. Crawford, Infragravity waves in the deep ocean, J. Geophys. Res., 96, 2723–2736, 1991.

Download references

Author information

Correspondence to Barbara Romanowicz.

Rights and permissions

Reprints and Permissions

About this article

Verify currency and authenticity via CrossMark

Keywords

  • Seismic Noise
  • Ocean Bottom
  • Broadband Seismometer
  • Broadband Seismic Station
  • Infragravity Wave