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Comparison of eigenvectors for coupled seismo-electromagnetic layered-Earth modelling

N. Grobbe, E.C. Slob and J.W. Thorbecke.

in Geophysical Journal International

P ublished online April 2016 .

Journal Article. Subjects: Geophysics; Oceanography and Hydrology. 17155 words.

We study the accuracy and numerical stability of three eigenvector sets for modelling the coupled poroelastic and electromagnetic layered-Earth response. We use a known eigenvector set, its...

Compensating for source and receiver ghost effects in full waveform inversion and reverse time migration for marine streamer data

Dong Sun, Kun Jiao, Xin Cheng and Denes Vigh.

in Geophysical Journal International

P ublished online April 2015 .

Journal Article. Subjects: Geophysics; Oceanography and Hydrology. 7490 words.

In conventional marine seismic surveys, due to the time-delayed reflections from the sea surface on both source and receiver sides, ghosts present in recorded seismograms and lead to both...

Complex seismic amplitude inversion for P-wave and S-wave quality factors

Zhaoyun Zong, Xingyao Yin and Guochen Wu.

in Geophysical Journal International

P ublished online May 2015 .

Journal Article. Subjects: Geophysics; Oceanography and Hydrology. 7854 words.

Stratum quality factors (P-wave and S-wave quality factors, Q p and Q s ) have gradually been utilized in...

Computation of optimized arrays for 3-D electrical imaging surveys

M. H. Loke, P. B. Wilkinson, S. S. Uhlemann, J. E. Chambers and L. S. Oxby.

in Geophysical Journal International

P ublished online October 2014 .

Journal Article. Subjects: Geophysics; Oceanography and Hydrology. 8451 words.

3-D electrical resistivity surveys and inversion models are required to accurately resolve structures in areas with very complex geology where 2-D models might suffer from artefacts. Many...

Controlled-source electromagnetic and seismic delineation of subseafloor fluid flow structures in a gas hydrate province, offshore Norway

Eric Attias, Karen Weitemeyer, Tim A. Minshull, Angus I. Best, Martin Sinha, Marion Jegen-Kulcsar, Sebastian Hölz and Christian Berndt.

in Geophysical Journal International

P ublished online May 2016 .

Journal Article. Subjects: Geophysics; Oceanography and Hydrology. 11336 words.

Deep sea pockmarks underlain by chimney-like or pipe structures that contain methane hydrate are abundant along the Norwegian continental margin. In such hydrate provinces the interaction...

Correction of non-intrusive drill core physical properties data for variability in recovered sediment volume

M.H. Walczak, A.C. Mix, T. Willse, A. Slagle, J.S. Stoner, J. Jaeger, S. Gulick, L. LeVay and Arata Kioka.

in Geophysical Journal International

P ublished online July 2015 .

Journal Article. Subjects: Geophysics; Oceanography and Hydrology. 4069 words.

Non-intrusive track-based physical properties measurements of sediment cores recovered during ocean drilling are often biased by imperfect recovery within sediment core liners, particularly...

Corrections of surface fissure effect on apparent resistivity measurements

J. Gance, P. Sailhac and J.-P. Malet.

in Geophysical Journal International

P ublished online December 2014 .

Journal Article. Subjects: Geophysics; Oceanography and Hydrology. 11092 words.

Electrical resistivity tomography (ERT) is a useful tool to detect and track water flow paths in the subsoil. However, measurements are strongly affected by subsurface heterogeneities such...

Cross-well 4-D resistivity tomography localizes the oil–water encroachment front during water flooding

J. Zhang and A. Revil.

in Geophysical Journal International

P ublished online February 2015 .

Journal Article. Subjects: Geophysics; Oceanography and Hydrology. 7085 words.

The early detection of the oil–water encroachment front is of prime interest during the water flooding of an oil reservoir to maximize the production of oil and to avoid the oil–water...

Crustal structure of the Murray Ridge, northwest Indian Ocean, from wide-angle seismic data

T.A. Minshull, R.A. Edwards and E.R. Flueh.

in Geophysical Journal International

P ublished online May 2015 .

Journal Article. Subjects: Geophysics; Oceanography and Hydrology. 6297 words.

The Murray Ridge/Dalrymple Trough system forms the boundary between the Indian and Arabian plates in the northern Arabian Sea. Geodetic constraints from the surrounding continents suggest...

2-D and 3-D joint inversion of loop–loop electromagnetic and electrical data for resistivity and magnetic susceptibility

Myeong-Jong Yi and Yutaka Sasaki.

in Geophysical Journal International

P ublished online September 2015 .

Journal Article. Subjects: Geophysics; Oceanography and Hydrology. 6167 words.

Frequency-domain loop–loop electromagnetic (EM) methods are sensitive to the magnetic susceptibility of the Earth as well as its resistivity. Thus, inversion techniques have been used to...

3-D GPR data analysis for high-resolution imaging of shallow subsurface faults: the Mt Vettore case study (Central Apennines, Italy)

Maurizio Ercoli, Cristina Pauselli, Alessandro Frigeri, Emanuele Forte and Costanzo Federico.

in Geophysical Journal International

P ublished online May 2014 .

Journal Article. Subjects: Geophysics; Oceanography and Hydrology. 8130 words.

The activation of Late Quaternary faults in the Central Apennines (Italy) could generate earthquakes with magnitude of about 6.5, and the Monte Vettore fault system probably belongs to the...

4-D imaging of seepage in earthen embankments with time-lapse inversion of self-potential data constrained by acoustic emissions localization

J.B. Rittgers, A. Revil, T. Planes, M.A. Mooney and A.R. Koelewijn.

in Geophysical Journal International

P ublished online December 2014 .

Journal Article. Subjects: Geophysics; Oceanography and Hydrology. 8580 words.

New methods are required to combine the information contained in the passive electrical and seismic signals to detect, localize and monitor hydromechanical disturbances in porous media. We...

2-D ocean temperature and salinity images from pre-stack seismic waveform inversion methods: an example from the South China Sea

Amit Padhi, Subhashis Mallick, Will Fortin, W. Steven Holbrook and Tanya M. Blacic.

in Geophysical Journal International

P ublished online May 2015 .

Journal Article. Subjects: Geophysics; Oceanography and Hydrology. 8938 words.

Seismic reflections from the oceanic water column contain information about ocean temperature and salinity. Even though seismic waveform inversion is effective for studying oceanic...

3-D thermal effect of late Cenozoic erosion and deposition within the Lofoten–Vesterålen segment of the Mid-Norwegian continental margin

Yuriy Petrovich Maystrenko, Laurent Gernigon, Odleiv Olesen, Dag Ottesen and Leif Rise.

in Geophysical Journal International

P ublished online January 2018 .

Journal Article. Subjects: Geophysics; Oceanography and Hydrology. 22038 words.

Summary

A 3-D subsurface temperature distribution within the Lofoten–Vesterålen segment of the Mid-Norwegian continental margin and adjacent areas has been...

Development and testing of displacement inversion to track electrode movements on 3-D electrical resistivity tomography monitoring grids

Paul B. Wilkinson, Sebastian Uhlemann, Jonathan E. Chambers, Philip I. Meldrum and Meng Heng Loke.

in Geophysical Journal International

P ublished online February 2015 .

Journal Article. Subjects: Geophysics; Oceanography and Hydrology. 9105 words.

Electrodes installed on active landslides and vulnerable earthworks to monitor changes in resistivity associated with moisture dynamics can be subject to movement. This affects the...

Dip-separated structural filtering using seislet transform and adaptive empirical mode decomposition based dip filter

Yangkang Chen.

in Geophysical Journal International

P ublished online April 2016 .

Journal Article. Subjects: Geophysics; Oceanography and Hydrology. 5783 words.

The seislet transform has been demonstrated to have a better compression performance for seismic data compared with other well-known sparsity promoting transforms, thus it can be used to...

Distribution of melt along the East Pacific Rise from 9°30′ to 10°N from an amplitude variation with angle of incidence (AVA) technique

Milena Marjanović, Hélène Carton, Suzanne M. Carbotte, Mladen R. Nedimović, John C. Mutter and J. Pablo Canales.

in Geophysical Journal International

P ublished online July 2015 .

Journal Article. Subjects: Geophysics; Oceanography and Hydrology. 15757 words.

We examine along-axis variations in melt content of the axial magma lens (AML) beneath the fast-spreading East Pacific Rise (EPR) using an amplitude variation with angle of incidence (AVA)...

Does wettability influence seismic wave propagation in liquid-saturated porous rocks?

Zizhen Wang, Douglas R. Schmitt and Ruihe Wang.

in Geophysical Journal International

P ublished online November 2015 .

Journal Article. Subjects: Geophysics; Oceanography and Hydrology. 4599 words.

In order to evaluate the effects of different fluids, we measured the P and S wave speeds through a series of synthetic epoxy-bonded carbonate composites with porosities from 21.9 to 31.5...

Doubling the spectrum of time-domain induced polarization by harmonic de-noising, drift correction, spike removal, tapered gating and data uncertainty estimation

Per-Ivar Olsson, Gianluca Fiandaca, Jakob Juul Larsen, Torleif Dahlin and Esben Auken.

in Geophysical Journal International

P ublished online August 2016 .

Journal Article. Subjects: Geophysics; Oceanography and Hydrology. 7848 words.

The extraction of spectral information in the inversion process of time-domain (TD) induced polarization (IP) data is changing the use of the TDIP method. Data interpretation is evolving...

Early seafloor spreading in the South Atlantic: new evidence for M-series magnetochrons north of the Rio Grande Fracture Zone

Dale E. Bird and Stuart A. Hall.

in Geophysical Journal International

P ublished online April 2016 .

Journal Article. Subjects: Geophysics; Oceanography and Hydrology. 4919 words.

Recent tectonic reconstructions of the South Atlantic have partitioned the ocean basin into several segments based upon one or more proposed intraplate South American deformation zones. In...