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Journal Article

Fast 2.5D and 3D inversion of transient electromagnetic surveys using the octree-based finite-element method

Longying Xiao, Gianluca Fiandaca, Bo Zhang, Esben Auken, Anders Vest Christiansen
Journal: Geophysics
Published: 20 June 2022
Geophysics (2022) 87 (4): E267–E277.
DOI: https://doi.org/10.1190/geo2021-0402.1
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Inversion of induced polarization-affected towed-transient electromagnetic data in a lateritic regolith geology: A case study from western Tanzania

Pradip Kumar Maurya, Denys Grombacher, Johan Lind, John W. Lane, Esben Auken
Journal: Geophysics
Published: 01 June 2022
Geophysics (2022) 87 (4): B247–B254.
DOI: https://doi.org/10.1190/geo2021-0396.1
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Integrating neural networks in least-squares inversion of airborne time-domain electromagnetic data

Muhammad Rizwan Asif, Nikolaj Foged, Pradip Kumar Maurya, Denys James Grombacher, Anders Vest Christiansen, Esben Auken, Jakob Juul Larsen
Journal: Geophysics
Published: 04 May 2022
Geophysics (2022) 87 (4): E177–E187.
DOI: https://doi.org/10.1190/geo2021-0335.1
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Heterodox transients in time-domain-induced polarization

Gianluca Fiandaca, Per-Ivar Olsson, Pradip Kumar Maurya, Anders Kühl, Thue Bording, Torleif Dahlin, Esben Auken
Journal: Geophysics
Published: 18 November 2021
Geophysics (2022) 87 (1): E35–E47.
DOI: https://doi.org/10.1190/geo2020-0808.1
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3D inversion of time-domain electromagnetic data using finite elements and a triple mesh formulation

Bo Zhang, Kim Wann Engebretsen, Gianluca Fiandaca, Hongzhu Cai, Esben Auken
Journal: Geophysics
Published: 13 May 2021
Geophysics (2021) 86 (3): E257–E267.
DOI: https://doi.org/10.1190/geo2020-0079.1
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Apsu — A new compact surface nuclear magnetic resonance system for groundwater investigation

Jakob Juul Larsen, Lichao Liu, Denys Grombacher, Gordon Osterman, Esben Auken
Journal: Geophysics
Published: 12 February 2020
Geophysics (2020) 85 (2): JM1–JM11.
DOI: https://doi.org/10.1190/geo2018-0779.1
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A discussion of 2D induced polarization effects in airborne electromagnetic and inversion with a robust 1D laterally constrained inversion scheme

Changhong Lin, Gianluca Fiandaca, Esben Auken, Marco Antonio Couto, Anders Vest Christiansen
Journal: Geophysics
Published: 12 February 2019
Geophysics (2019) 84 (2): E75–E88.
DOI: https://doi.org/10.1190/geo2018-0102.1
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tTEM — A towed transient electromagnetic system for detailed 3D imaging of the top 70 m of the subsurface

Esben Auken, Nikolaj Foged, Jakob Juul Larsen, Knud Valdemar Trøllund Lassen, Pradip Kumar Maurya, Søren Møller Dath, Tore Tolstrup Eiskjær
Journal: Geophysics
Published: 28 November 2018
Geophysics (2019) 84 (1): E13–E22.
DOI: https://doi.org/10.1190/geo2018-0355.1
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Frequency cycling to alleviate unknown frequency offsets for adiabatic half-passage pulses in surface nuclear magnetic resonance

Denys Grombacher, Raphael Dlugosch, Elliot Grunewald, Mike Müller-Petke, Esben Auken
Journal: Geophysics
Published: 02 August 2018
Geophysics (2018) 83 (5): JM29–JM38.
DOI: https://doi.org/10.1190/geo2017-0701.1
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An efficient 2D inversion scheme for airborne frequency-domain data

Tue Boesen, Esben Auken, Anders Vest Christiansen, Gianluca Fiandaca, Casper Kirkegaard, Andreas Aspmo Pfaffhuber, Malte Vöge
Journal: Geophysics
Published: 30 May 2018
Geophysics (2018) 83 (4): E189–E201.
DOI: https://doi.org/10.1190/geo2017-0280.1
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The effects of 3D topography on controlled-source audio-frequency magnetotelluric responses

Changhong Lin, Sumei Zhong, Esben Auken, Hongzhu Cai, Handong Tan, Miao Peng, Wenxin Kong
Journal: Geophysics
Published: 16 February 2018
Geophysics (2018) 83 (2): WB97–WB108.
DOI: https://doi.org/10.1190/geo2017-0429.1
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Resolution of well-known resistivity equivalences by inclusion of time-domain induced polarization data

Line Meldgaard Madsen, Gianluca Fiandaca, Anders Vest Christiansen, Esben Auken
Journal: Geophysics
Published: 05 December 2017
Geophysics (2018) 83 (1): E47–E54.
DOI: https://doi.org/10.1190/geo2017-0009.1
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Accounting for relaxation during pulse effects for long pulses and fast relaxation times in surface nuclear magnetic resonance

Denys Grombacher, Ahmad A. Behroozmand, Esben Auken
Journal: Geophysics
Published: 25 September 2017
Geophysics (2017) 82 (6): JM23–JM36.
DOI: https://doi.org/10.1190/geo2016-0567.1
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3D aquifer mapping employing airborne geophysics to meet India's water future

Subash Chandra, Shakeel Ahmed, Esben Auken, Jesper B. Pedersen, Amarjit Singh, Saurabh K. Verma
Journal: The Leading Edge
Published: 01 September 2016
The Leading Edge (2016) 35 (9): 770–774.
DOI: https://doi.org/10.1190/tle35090770.1
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On determining uncertainties of magnetic resonance sounding estimated transmissivities for groundwater modeling

Troels Norvin Vilhelmsen, Steen Christensen, Esben Auken
Journal: Geophysics
Published: 23 May 2016
Geophysics (2016) 81 (4): WB63–WB73.
DOI: https://doi.org/10.1190/geo2015-0494.1
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Helicopter-borne transient electromagnetics in high-latitude environments: An application in the McMurdo Dry Valleys, Antarctica

Neil Foley, Slawek Tulaczyk, Esben Auken, Cyril Schamper, Hilary Dugan, Jill Mikucki, Ross Virginia, Peter Doran
Journal: Geophysics
Published: 21 December 2015
Geophysics (2016) 81 (1): WA87–WA99.
DOI: https://doi.org/10.1190/geo2015-0186.1
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Field-scale time-domain spectral induced polarization monitoring of geochemical changes induced by injected CO 2 in a shallow aquifer

Joseph Doetsch, Gianluca Fiandaca, Esben Auken, Anders Vest Christiansen, Aaron Graham Cahill, Rasmus Jakobsen
Journal: Geophysics
Published: 09 February 2015
Geophysics (2015) 80 (2): WA113–WA126.
DOI: https://doi.org/10.1190/geo2014-0315.1
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Hydrogeophysical investigations in the western and north-central Okavango Delta (Botswana) based on helicopter and ground-based transient electromagnetic data and electrical resistance tomography

Philip Meier, Thomas Kalscheuer, Joel E. Podgorski, Lesego Kgotlhang, Alan G. Green, Stewart Greenhalgh, Lasse Rabenstein, Joseph Doetsch, Wolfgang Kinzelbach, Esben Auken, Peter Mikkelsen, Nikolaj Foged, Bashali Charles Jaba, Gomotsang Tshoso, Onkgopotse Ntibinyane
Journal: Geophysics
Published: 21 July 2014
Geophysics (2014) 79 (5): B201–B211.
DOI: https://doi.org/10.1190/geo2014-0001.1
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Assessment of near-surface mapping capabilities by airborne transient electromagnetic data — An extensive comparison to conventional borehole data

Cyril Schamper, Flemming Jørgensen, Esben Auken, Flemming Effersø
Journal: Geophysics
Published: 04 June 2014
Geophysics (2014) 79 (4): B187–B199.
DOI: https://doi.org/10.1190/geo2013-0256.1
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Paleo-megalake and paleo-megafan in southern Africa

Joel E. Podgorski, Alan G. Green, Lesego Kgotlhang, Wolfgang K.H. Kinzelbach, Thomas Kalscheuer, Esben Auken, Tiyapo Ngwisanyi
Journal: Geology
Published: 01 November 2013
Geology (2013) 41 (11): 1155–1158.
DOI: https://doi.org/10.1130/G34735.1
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