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Infrasonic seismic and acoustic measurements in the deep ocean

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3 Author(s)
Adair, R.G. ; Scripps Inst. of Oceanogr., California Univ., San Diego, CA, USA ; Orcutt, J.A. ; Farrell, W.E.

The authors compare the signal-to-noise ratios obtained on bottomed seismometers, bottomed hydrophones, and buried seismometers from near-surface explosions in the Ngendei Expedition. The data were recorded in 5.5-km-deep water in the south central Pacific Ocean with a triaxial borehole seismograph and four triaxial ocean-bottom seismographs having externally mounted hydrophones. At ranges less than 35 km, the data indicate that the ocean bottom seismometer is a superior signal detector than the ocean-bottom hydrophone, and that the subbottom seismometer is superior in performance to the ocean-bottom seismometer. Above 4 Hz, the seismometer appears to have a 10-dB signal-to-noise advantage over the hydrophone for surface explosions at ranges less than 30 km

Published in:

Oceanic Engineering, IEEE Journal of  (Volume:13 ,  Issue: 4 )