Browsing Geofysikk by Issue Date
Now showing items 1-20 of 69
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(Master thesis / Masteroppgave, 2009)Sea surface profile and reflection coefficient estimates are vital input parameters to various seismic data processing applications. The common assumption of a flat sea surface when processing seismic data can lead to ...
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(Master thesis / Masteroppgave, 2009)The aim of this thesis is to investigate and gain better understanding of a new modeling technique called modeling by demigration. Demigration itself can be defined as the inverse of true amplitude migration. This involves ...
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(Master thesis / Masteroppgave, 2009)Marin seismic acquisition results in signals that are affected by both random and coherent noise. For successful imaging it is important that as much as possible of this noise is attenuated in an early stage of processing. ...
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(Doctoral thesis / Doktoravhandling, 2009)Magma transport through the Earth’s crust often ends in sedimentary basins. While it erupts at the surface, a significant part of the magma emplaces in depth in the basin forming sheet complexes dominated by horizontal ...
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(Master thesis / Masteroppgave, 2009)In this thesis we present a three-dimensional (3-D) seismic SV-wave speed model for the upper mantle beneath Northern Europe derived from the analysis of fundamental mode Rayleigh waveforms. Selecting recordings with ...
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(Master thesis / Masteroppgave, 2009)Sammendrag På Åknes i Møre og Romsdal, Norge, er det i dalsiden av en fjord oppdaget et potensielt fjellskred. Et ras på Åknes kan lage en enorm flodbølge nede i fjorden. Denne flodbølgen vil ødelegge de nærmeste bygdene ...
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(Master thesis / Masteroppgave, 2010)In a 3D marine survey, often large areas of poor coverage (‘coverage holes’) exist caused by feathering during the actual acquisition. Infill management is introduced to fill those ‘coverage holes’, but a high percentage ...
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(Master thesis / Masteroppgave, 2010)I denne oppgaven undersøker vi variasjoner i temperatur og tetthet i litosfæren i Sør Norge og diskuterer de mulige tektoniske betydningene av disse. I den første delen videreutvikles en metode som beregner temperatur og ...
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(Master thesis / Masteroppgave, 2011)The impact of earthquakes, due to ground shaking, which affects the whole tunnel length from ovaling of the tunnel cross section, is investigated in this thesis. The influence of rock mass quality Q and the tunnel dimension ...
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(Master thesis / Masteroppgave, 2011)This thesis investigates the application of the Empirical Mode Decomposition (EMD) and Ensemble Empirical Mode Decomposition (EEMD) techniques in de-noising of marine seismic data. EMD decomposes the seismic dataset into ...
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(Master thesis / Masteroppgave, 2011)Abstract Seismic time migration is a cost and time effective process for imaging of the subsurface. However, the approach is traditionally limited to velocity models with mildly varying lateral variations. The objective ...
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(Master thesis / Masteroppgave, 2012)Scandinavian Mountain Range is located at the continental margin of the Eurasian plate. This area is part of the Baltic shield so topography is expected to be generally low. But this is not the case here. In South western ...
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(Master thesis / Masteroppgave, 2012)
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(Master thesis / Masteroppgave, 2012)Shooting in an overlapping fashion is called blended or simultaneous acquisition. This can make acquisition efficient and economical. However, deblending (i.e. the process of separating the blended data) of data can be ...
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(Master thesis / Masteroppgave, 2013)Two wide angle 3-Compnent Ocean Bottom Seismometer (OBS) profiles along with associated Land-Stations acquired during 2003 under the EUROMARGINS Program were analyzed during this M.Sc. Thesis. These profiles are named as ...
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(Master thesis / Masteroppgave, 2013)Marine Seismic Interference (SI) occurs when several seismic vessels operate in close proximity, and the interfering energy from one vessel is recorded as interfering noise by another. Generally, SI is removed by various ...
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(Master thesis / Masteroppgave, 2013)In this thesis a new approach, called THEAMTM, is presented. The THEAMTM methodology is a non-invasive tunnel health monitoring method using active seismic. The method incorporates geophysical seismic analysis methods and ...
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(Master thesis / Masteroppgave, 2013)
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(Master thesis / Masteroppgave, 2014)This master thesis in Geophysics is about detecting and attenuating seismic interference noise. The thesis is written in collaboration with the Marine R&D Department at CGG and Department of Geosciences at the University ...
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(Master thesis / Masteroppgave, 2014)The aim of this work was to compare various dip estimation methods and apply the best of them to identify the dip of seismic interference noise (SI) in the shot domain. Four dip estimation methods were considered: correlation ...