Accurate Ocean Bottom Seismometer Positioning Method Inspired by Multilateration Technique
Sign Up to like & getrecommendations! Published in 2018 at "Mathematical Geosciences"
DOI: 10.1007/s11004-017-9719-5
Abstract: The positioning of ocean bottom seismometers (OBS) is a key step in the processing flow of OBS data, especially in the case of self popup types of OBS instruments. The use of first arrivals from… read more here.
Keywords: accurate ocean; multilateration technique; ocean bottom;
Ocean bottom geophysical array studies may reveal the cause of seafloor flattening
Sign Up to like & getrecommendations! Published in 2019 at "Earth and Planetary Science Letters"
DOI: 10.1016/j.epsl.2019.04.040
Abstract: Abstract Flattening of old seafloor as a result of the time evolution of oceanic lithosphere and asthenosphere has been studied for several decades and remains one of the unresolved fundamental problems of geodynamics. The phenomenon… read more here.
Keywords: cause seafloor; ocean bottom; model; seafloor flattening ... See more keywords
Improving ambient noise cross-correlations in the noisy ocean bottom environment of the Juan de Fuca plate
Sign Up to like & getrecommendations! Published in 2017 at "Geophysical Journal International"
DOI: 10.1093/gji/ggx281
Abstract: S U M M A R Y Ambient noise tomography exploits seismic ground motions that propagate coherently over long interstation distances. Such ground motions provide information about the medium of propagation that is recoverable from… read more here.
Keywords: ambient noise; ocean bottom; plate; cross correlations ... See more keywords
Elastic Seismic Imaging Enhancement of Sparse 4C Ocean-Bottom Node Data Using Deep Learning
Sign Up to like & getrecommendations! Published in 2023 at "IEEE Transactions on Geoscience and Remote Sensing"
DOI: 10.1109/tgrs.2023.3275614
Abstract: The ocean-bottom node (OBN) seismic acquisition system is designed to gather high-fidelity, wide-azimuth, and long-offset four-component (4C) data, which includes shear waves and enables the use of the elastic assumption in imaging and inversion. However,… read more here.
Keywords: node; sparse; bottom node; ocean bottom ... See more keywords
A Geometry-Based Underwater Acoustic Channel Model Allowing for Sloped Ocean Bottom Conditions
Sign Up to like & getrecommendations! Published in 2017 at "IEEE Transactions on Wireless Communications"
DOI: 10.1109/twc.2017.2664829
Abstract: This paper proposes a new geometry-based channel model for shallow-water ocean environments, in which the ocean bottom can slope gently down/up. The need for developing such an underwater acoustic (UWA) channel model is driven by… read more here.
Keywords: geometry; channel model; ocean bottom; geometry based ... See more keywords
Density estimation using ocean-bottom seismometers in Cascadia
Sign Up to like & getrecommendations! Published in 2018 at "Journal of the Acoustical Society of America"
DOI: 10.1121/1.5068144
Abstract: The Cascadia Initiative placed a large number of ocean-bottom seismic sensors off the coast of the US Pacific Northwest. These sensors recorded pulsed sounds from fin whales, recorded in conditions that in many cases make… read more here.
Keywords: estimation using; using ocean; density estimation; ocean bottom ... See more keywords
Relationship between pressure variations at the ocean bottom and the acceleration of its motion during a submarine earthquake
Sign Up to like & getrecommendations! Published in 2018 at "Earth, Planets and Space"
DOI: 10.1186/s40623-018-0874-9
Abstract: AbstractThe data provided by ten DONET deep-sea observatories, that on March 11, 2011, registered the Great East Japan Earthquake and tsunami, were used for investigation of the relationship between variations of the ocean bottom pressure… read more here.
Keywords: pressure variations; ocean bottom; acceleration; variations ocean ... See more keywords
Vector-wave-based elastic reverse-time migration of ocean bottom 4C seismic data
Sign Up to like & getrecommendations! Published in 2018 at "Geophysics"
DOI: 10.1190/geo2017-0250.1
Abstract: The acoustic-elastic coupled equation (AECE) has a number of advantages when compared to the conventional scalar-wave-based elastic reverse-time migration (ERTM) methods used to image ocean bottom multicomponent seismic data. In particular, vector-wave-based ERTM requires vectorial… read more here.
Keywords: based elastic; wave based; ocean bottom; seismic data ... See more keywords
Elastic Gaussian-beam migration for four-component ocean-bottom seismic data
Sign Up to like & getrecommendations! Published in 2020 at "GEOPHYSICS"
DOI: 10.1190/geo2018-0716.1
Abstract: Multimode and multicomponent elastic Gaussian-beam migration is attractive for its efficiency, flexibility, and accuracy. However, when it is used for ocean-bottom seismic data, the incomplete boundary condition will yield some nonphysical artifacts in the final… read more here.
Keywords: ocean bottom; migration; beam migration; elastic gaussian ... See more keywords
Multiparameter full-waveform inversion of 3D ocean-bottom cable data from the Valhall field
Sign Up to like & getrecommendations! Published in 2021 at "GEOPHYSICS"
DOI: 10.1190/geo2019-0705.1
Abstract: Full-waveform inversion (FWI) applications on 3D ocean-bottom cable (OBC) data from the Valhall oil field in the North Sea have demonstrated the importance of appropriately accounting for attenuation. The Valhall field contains unconsolidated shallow sediments… read more here.
Keywords: inversion; ocean bottom; field; attenuation ... See more keywords
Elastic common-receiver Gaussian beam migration of 4C sparse ocean-bottom node data
Sign Up to like & getrecommendations! Published in 2023 at "GEOPHYSICS"
DOI: 10.1190/geo2021-0681.1
Abstract: Four-component (4C) ocean-bottom node (OBN) surveys provide an opportunity to image subsurface elastic properties for oil and gas exploration in deep water environments. However, sparse acquisition sampling is challenging for high-quality imaging of OBN data.… read more here.
Keywords: bottom node; common receiver; receiver; migration ... See more keywords