Effect of the water-saturated sediment layer on recording seismic signals with a bottom seismometer

Левченко, Д. Г.

doi:10.1134/s0001437006050146

Cited by 1 publication

(1 citation statement)

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“…Ocean Bottom Seismometer (OBS) [9,10] can work several months in 6 km depth ocean bottom to measure seismic waves ranging from 0 Hz to 30 Hz. But OBS is directly placed on the seafloor and is always influenced by seabed topography, sediment layer, and ocean turbulence [11,12]. The Neath Seafloor Equipment for Recording Earth's Internal Deformation (NEREID) used in the Ocean Discovery Program (ODP) [13,14] is the most advanced water bottom seismological observatory system, which installs seismometer in seafloor borehole constructed by the Riser Drilling Vessel to improve the quality of seismic observation.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Measurement of Water Bottom Vibration Induced by Underwater Drilling Blasting

Chen

Wang

et al. 2015

Shock and Vibration

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Due to the lack of proper instrumentations and the difficulties in underwater measurements, the studies about water bottom vibration induced by underwater drilling blasting are seldom reported. In order to investigate the propagation and attenuation laws of blasting induced water bottom vibration, a water bottom vibration monitor was developed with consideration of the difficulties in underwater measurements. By means of this equipment, the actual water bottom vibration induced by underwater drilling blasting was measured in a field experiment. It shows that the water bottom vibration monitor could collect vibration signals quite effectively in underwater environments. The followed signal analysis shows that the characteristics of water bottom vibration and land ground vibration induced by the same underwater drilling blasting are quite different due to the different geological environments. The amplitude and frequency band of water bottom vibration both exceed those of land ground vibration. Water bottom vibration is mainly in low-frequency band that induced by blasting impact directly acts on rock. Besides the low-frequency component, land vibration contains another higher frequency band component that induced by followed water hammer wave acts on bank slope.

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Section: Introductionmentioning

confidence: 99%