Institution
Electromagnetic Geoservices
Company•Trondheim, Norway•
About: Electromagnetic Geoservices is a company organization based out in Trondheim, Norway. It is known for research contribution in the topics: Electromagnetics & Inversion (meteorology). The organization has 116 authors who have published 121 publications receiving 2515 citations.
Topics: Electromagnetics, Inversion (meteorology), Magnetotellurics, Reservoir modeling, Maxwell's equations
Papers published on a yearly basis
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Vilnius University1, University of Ferrara2, Aarhus University3, University of Oslo4, Royal Institute of Technology5, Electromagnetic Geoservices6, University of Trieste7, Norwegian Computing Center8, University of Southern Denmark9, University of Santiago de Compostela10, Danske Bank11, Ruhr University Bochum12, Norwegian Meteorological Institute13, Norwegian Defence Research Establishment14, University of Auckland15, Norwegian University of Science and Technology16, Information Technology University17, Technical University of Ostrava18, Linköping University19, Karlsruhe Institute of Technology20, ETH Zurich21, Australian National University22, University of Modena and Reggio Emilia23, Cisco Systems, Inc.24, University of Buenos Aires25, University of Copenhagen26, University of Erlangen-Nuremberg27, Kazimierz Wielki University in Bydgoszcz28, National Scientific and Technical Research Council29, University of Valencia30, Paul Sabatier University31, University of Melbourne32, University of Nottingham33, University of Bristol34, CLC bio35, Princeton University36, La Trobe University37, Clemson University38
TL;DR: Dalton is a powerful general‐purpose program system for the study of molecular electronic structure at the Hartree–Fock, Kohn–Sham, multiconfigurational self‐consistent‐field, Møller–Plesset, configuration‐interaction, and coupled‐cluster levels of theory.
Abstract: Dalton is a powerful general-purpose program system for the study of molecular electronic structure at the Hartree-Fock, Kohn-Sham, multiconfigurational self-consistent-field, MOller-Plesset, confi ...
1,212 citations
TL;DR: In this article, the authors used high-resolution swath bathymetry obtained from Van Keulenfjorden and Rindersbukta (inner Van Mijendalen), Spitsbergen, Svalbard, Norway.
142 citations
TL;DR: The Southern African Magnetotelluric Experiment (SAMTEX) has revealed complex structure in the lithospheric mantle of the southern African Kaapvaal craton and surrounding terranes as discussed by the authors.
Abstract: [1] A regional-scale magnetotelluric (MT) experiment across the southern African Kaapvaal craton and surrounding terranes, called the Southern African Magnetotelluric Experiment (SAMTEX), has revealed complex structure in the lithospheric mantle. Large variations in maximum resistivity at depths to 200–250 km relate directly to age and tectonic provenance of surface structures. Within the central portions of the Kaapvaal craton are regions of resistive lithosphere about 230 km thick, in agreement with estimates from xenolith thermobarometry and seismic surface wave tomography, but thinner than inferred from seismic body wave tomography. The MT data are unable to discriminate between a completely dry or slightly “damp” (a few hundred parts per million of water) structure within the transitional region at the base of the lithosphere. However, the structure of the uppermost ∼150 km of lithosphere is consistent with enhanced, but still low, conductivities reported for hydrous olivine and orthopyroxene at levels of water reported for Kaapvaal xenoliths. The electrical lithosphere around the Kimberley and Premier diamond mines is thinner than the maximum craton thickness found between Kimberley and Johannesburg/Pretoria. The mantle beneath the Bushveld Complex is highly conducting at depths around 60 km. Possible explanations for these high conductivities include graphite or sulphide and/or iron metals associated with the Bushveld magmatic event. We suggest that one of these conductive phases (most likely melt-related sulphides) could electrically connect iron-rich garnets in a garnet-rich eclogitic composition associated with a relict subduction slab.
111 citations
TL;DR: In this article, it is shown that it is possible to transform the original physical problem to one that has propagation velocities with less frequency dependence, and the number of time steps necessary for a signal to travel a certain distance with the lowest velocity is significantly reduced.
Abstract: In the low-frequency limit, the displacement currents in the Maxwell equations can be neglected. However, for numerical simulations, a small displacement current should be present to achieve numerical stability. This requirement leads to a large range of propagation velocities with high velocities for the high frequencies and low velocities for the low frequencies. As a consequence, the number of time steps may become large. I show that it is possible to transform mathematically the original physical problem to one that has propagation velocities with less frequency dependence. Hence, the number of time steps necessary for a signal to travel a certain distance with the lowest velocity is significantly reduced. A typical example shows a reduction in computational time by a factor of 40. A comparison of the solutions from plane-layered modeling in the frequency and wavenumber domain and the proposed method shows good agreement between the two. The proposed method can also be used for other systems of diffusive equations.
97 citations
TL;DR: The use of CSEM technology for hydrocarbon exploration in marine environments has been investigated in this article, where the technology has been demonstrated to aid both detection and delineation of hydrocarbon-filled reservoirs.
Abstract: During the past several years, we have seen an increasing focus on the use of CSEM technology for hydrocarbon exploration in marine environments and, recently, a number of success stories have been published The technology has been demonstrated to aid both detection and delineation of hydrocarbon-filled reservoirs
87 citations
Authors
Showing all 116 results
| Name | H-index | Papers | Citations |
|---|---|---|---|
| D. V. Shantsev | 31 | 87 | 2420 |
| Rune Mittet | 16 | 40 | 685 |
| Anh Kiet Nguyen | 13 | 36 | 516 |
| Jan Petter Morten | 13 | 45 | 542 |
| Cesar A. Gonzalez | 13 | 40 | 448 |
| Pengliang Yang | 9 | 27 | 400 |
| Kristian Rymann Hansen | 8 | 19 | 612 |
| Pål T. Gabrielsen | 8 | 23 | 198 |
| Linus Boman | 7 | 10 | 1362 |
| F. Roth | 6 | 12 | 128 |
| Frank A. Maaø | 6 | 12 | 243 |
| Sébastien de la Kethulle de Ryhove | 6 | 13 | 135 |
| Martin Panzner | 6 | 13 | 119 |
| Stein Fanavoll | 6 | 11 | 179 |
| David Ridyard | 5 | 22 | 95 |