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.
Infrasonic seismic and acoustic measurements in the deep ocean
Seismische und akustische Messungen im Infraschallgebiet im tiefen Ozean
IEEE Journal of Oceanic Engineering ; 13 , 4 ; 245-253
1988
9 Seiten, 19 Quellen
Article (Journal)
English
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