TERRAPUB Earth, Planets and Space

Earth Planets Space, Vol. 50 (Nos. 11, 12), pp. 927-937, 1998

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

Barbara Romanowicz1, Debra Stakes2, Jean Paul Montagner3, Pascal Tarits5, Robert Uhrhammer1, Michael Begnaud2, Eleonore Stutzmann3, Michael Pasyanos1, Jean-Francois Karczewski4, Steven Etchemendy2, and Douglas Neuhauser1

1Seismological Laboratory, U.C. Berkeley, Berkeley, CA, U.S.A.
2Monterey Bay Aquarium Research Institute, Moss Landing, CA, U.S.A.
3Institut de Physique du Globe, Paris, France
4Division Technique, Institut National des Sciences de l'Univers, Paris, France
5Universitéde Bretagne Occidentale, Brest, France

(Received May 6, 1998; Revised August 4, 1998; Accepted September 21, 1998)

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.

Corresponding author E-mail: barbara@seismo.berkeley.edu

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