Magnetotelluric 3D inversion - a recapitulation of two successful workshop on forward and inversion code testing and comparison
Over the last half decade the need for, and importance of, three-dimensional (3-D) modelling of magnetotelluric (MT) data have increased dramatically and various 3-D forward and inversion codes are in use and some have become commonly available. Comparison of forward responses and inversion results...
| Autores: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2013 |
| País: | España |
| Institución: | Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) |
| Repositorio: | Recercat. Dipósit de la Recerca de Catalunya |
| OAI Identifier: | oai:recercat.cat:2445/161799 |
| Acceso en línea: | https://hdl.handle.net/2445/161799 |
| Access Level: | acceso abierto |
| Palabra clave: | Geomagnetisme Prospecció magnetotel·lúrica Prospecció geofísica Geomagnetism Magnetotelluric prospecting Geophysical exploration |
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Magnetotelluric 3D inversion - a recapitulation of two successful workshop on forward and inversion code testing and comparisonMiensopust, Marion P.Queralt i Capdevila, PilarJones, Alan G.Avdeev, DmitryAvdeeva, AnnaBörner, Ralph-UweBosch Ros, DavidEgbert, GaryFarquharson, ColinFranke-Bönner, AntjeGarcia, XavierHan, NureeHautot, SophieHoltham, ElliotHübert, JulianeKhoza, DavidKiyan, DuyguLe Pape, FlorianLedo Fernández, JuanjoLee, Tae JongMackie, RandallMartí i Castells, AnnaMeqbel, NaserNewman, GregOldenburg, DougRosell Novel, OriolSasaki, YutakaSiripunvaraporn, WeerachaiTarits, PascalVozar, JanGeomagnetismeProspecció magnetotel·lúricaProspecció geofísicaGeomagnetismMagnetotelluric prospectingGeophysical explorationOver the last half decade the need for, and importance of, three-dimensional (3-D) modelling of magnetotelluric (MT) data have increased dramatically and various 3-D forward and inversion codes are in use and some have become commonly available. Comparison of forward responses and inversion results is an important step for code testing and validation prior to 'production' use. The various codes use different mathematical approximations to the problem (finite differences, finite elements or integral equations), various orientations of the coordinate system, different sign conventions for the time dependence and various inversion strategies. Additionally, the obtained results are dependent on data analysis, selection and correction as well as on the chosen mesh, inversion parameters and regularization adopted, and therefore, a careful and knowledge-based use of the codes is essential. In 2008 and 2011, during two workshops at the Dublin Institute for Advanced Studies over 40 people from academia (scientists and students) and industry from around the world met to discuss 3-D MT inversion. These workshops brought together a mix of code writers as well as code users to assess the current status of 3-D modelling, to compare the results of different codes, and to discuss and think about future improvements and new aims in 3-D modelling. To test the numerical forward solutions, two 3-D models were designed to compare the responses obtained by different codes and/or users. Furthermore, inversion results of these two data sets and two additional data sets obtained from unknown models (secret models) were also compared. In this manuscript the test models and data sets are described (supplementary files are available) and comparisons of the results are shown. Details regarding the used data, forward and inversion parameters as well as computational power are summarized for each case, and the main discussion points of the workshops are reviewed. In general, the responses obtained from the various forward models are comfortingly very similar, and discrepancies are mainly related to the adopted mesh. For the inversions, the results show how the inversion outcome is affected by distortion and the choice of errors, as well as by the completeness of the data set. We hope that these compilations will become useful not only for those that were involved in the workshops, but for the entire MT community and also the broader geoscience community who may be interested in the resolution offered by MT.Royal Astronomical Society2020202020132020info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersion23 p.application/pdfhttps://hdl.handle.net/2445/161799Articles publicats en revistes (Dinàmica de la Terra i l'Oceà)reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)InglésReproducció del document publicat a: https://doi.org/10.1093/gji/ggt066Geophysical Journal International, 2013, vol. 193, num. 3, p. 1216-1238https://doi.org/10.1093/gji/ggt066(c) Miensopust, M.P. et al., 2013info:eu-repo/semantics/openAccessoai:recercat.cat:2445/1617992026-05-29T05:05:01Z |
| dc.title.none.fl_str_mv |
Magnetotelluric 3D inversion - a recapitulation of two successful workshop on forward and inversion code testing and comparison |
| title |
Magnetotelluric 3D inversion - a recapitulation of two successful workshop on forward and inversion code testing and comparison |
| spellingShingle |
Magnetotelluric 3D inversion - a recapitulation of two successful workshop on forward and inversion code testing and comparison Miensopust, Marion P. Geomagnetisme Prospecció magnetotel·lúrica Prospecció geofísica Geomagnetism Magnetotelluric prospecting Geophysical exploration |
| title_short |
Magnetotelluric 3D inversion - a recapitulation of two successful workshop on forward and inversion code testing and comparison |
| title_full |
Magnetotelluric 3D inversion - a recapitulation of two successful workshop on forward and inversion code testing and comparison |
| title_fullStr |
Magnetotelluric 3D inversion - a recapitulation of two successful workshop on forward and inversion code testing and comparison |
| title_full_unstemmed |
Magnetotelluric 3D inversion - a recapitulation of two successful workshop on forward and inversion code testing and comparison |
| title_sort |
Magnetotelluric 3D inversion - a recapitulation of two successful workshop on forward and inversion code testing and comparison |
| dc.creator.none.fl_str_mv |
Miensopust, Marion P. Queralt i Capdevila, Pilar Jones, Alan G. Avdeev, Dmitry Avdeeva, Anna Börner, Ralph-Uwe Bosch Ros, David Egbert, Gary Farquharson, Colin Franke-Bönner, Antje Garcia, Xavier Han, Nuree Hautot, Sophie Holtham, Elliot Hübert, Juliane Khoza, David Kiyan, Duygu Le Pape, Florian Ledo Fernández, Juanjo Lee, Tae Jong Mackie, Randall Martí i Castells, Anna Meqbel, Naser Newman, Greg Oldenburg, Doug Rosell Novel, Oriol Sasaki, Yutaka Siripunvaraporn, Weerachai Tarits, Pascal Vozar, Jan |
| author |
Miensopust, Marion P. |
| author_facet |
Miensopust, Marion P. Queralt i Capdevila, Pilar Jones, Alan G. Avdeev, Dmitry Avdeeva, Anna Börner, Ralph-Uwe Bosch Ros, David Egbert, Gary Farquharson, Colin Franke-Bönner, Antje Garcia, Xavier Han, Nuree Hautot, Sophie Holtham, Elliot Hübert, Juliane Khoza, David Kiyan, Duygu Le Pape, Florian Ledo Fernández, Juanjo Lee, Tae Jong Mackie, Randall Martí i Castells, Anna Meqbel, Naser Newman, Greg Oldenburg, Doug Rosell Novel, Oriol Sasaki, Yutaka Siripunvaraporn, Weerachai Tarits, Pascal Vozar, Jan |
| author_role |
author |
| author2 |
Queralt i Capdevila, Pilar Jones, Alan G. Avdeev, Dmitry Avdeeva, Anna Börner, Ralph-Uwe Bosch Ros, David Egbert, Gary Farquharson, Colin Franke-Bönner, Antje Garcia, Xavier Han, Nuree Hautot, Sophie Holtham, Elliot Hübert, Juliane Khoza, David Kiyan, Duygu Le Pape, Florian Ledo Fernández, Juanjo Lee, Tae Jong Mackie, Randall Martí i Castells, Anna Meqbel, Naser Newman, Greg Oldenburg, Doug Rosell Novel, Oriol Sasaki, Yutaka Siripunvaraporn, Weerachai Tarits, Pascal Vozar, Jan |
| author2_role |
author author author author author author author author author author author author author author author author author author author author author author author author author author author author author |
| dc.subject.none.fl_str_mv |
Geomagnetisme Prospecció magnetotel·lúrica Prospecció geofísica Geomagnetism Magnetotelluric prospecting Geophysical exploration |
| topic |
Geomagnetisme Prospecció magnetotel·lúrica Prospecció geofísica Geomagnetism Magnetotelluric prospecting Geophysical exploration |
| description |
Over the last half decade the need for, and importance of, three-dimensional (3-D) modelling of magnetotelluric (MT) data have increased dramatically and various 3-D forward and inversion codes are in use and some have become commonly available. Comparison of forward responses and inversion results is an important step for code testing and validation prior to 'production' use. The various codes use different mathematical approximations to the problem (finite differences, finite elements or integral equations), various orientations of the coordinate system, different sign conventions for the time dependence and various inversion strategies. Additionally, the obtained results are dependent on data analysis, selection and correction as well as on the chosen mesh, inversion parameters and regularization adopted, and therefore, a careful and knowledge-based use of the codes is essential. In 2008 and 2011, during two workshops at the Dublin Institute for Advanced Studies over 40 people from academia (scientists and students) and industry from around the world met to discuss 3-D MT inversion. These workshops brought together a mix of code writers as well as code users to assess the current status of 3-D modelling, to compare the results of different codes, and to discuss and think about future improvements and new aims in 3-D modelling. To test the numerical forward solutions, two 3-D models were designed to compare the responses obtained by different codes and/or users. Furthermore, inversion results of these two data sets and two additional data sets obtained from unknown models (secret models) were also compared. In this manuscript the test models and data sets are described (supplementary files are available) and comparisons of the results are shown. Details regarding the used data, forward and inversion parameters as well as computational power are summarized for each case, and the main discussion points of the workshops are reviewed. In general, the responses obtained from the various forward models are comfortingly very similar, and discrepancies are mainly related to the adopted mesh. For the inversions, the results show how the inversion outcome is affected by distortion and the choice of errors, as well as by the completeness of the data set. We hope that these compilations will become useful not only for those that were involved in the workshops, but for the entire MT community and also the broader geoscience community who may be interested in the resolution offered by MT. |
| publishDate |
2013 |
| dc.date.none.fl_str_mv |
2013 2020 2020 2020 |
| dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
| format |
article |
| status_str |
publishedVersion |
| dc.identifier.none.fl_str_mv |
https://hdl.handle.net/2445/161799 |
| url |
https://hdl.handle.net/2445/161799 |
| dc.language.none.fl_str_mv |
Inglés |
| language_invalid_str_mv |
Inglés |
| dc.relation.none.fl_str_mv |
Reproducció del document publicat a: https://doi.org/10.1093/gji/ggt066 Geophysical Journal International, 2013, vol. 193, num. 3, p. 1216-1238 https://doi.org/10.1093/gji/ggt066 |
| dc.rights.none.fl_str_mv |
(c) Miensopust, M.P. et al., 2013 info:eu-repo/semantics/openAccess |
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(c) Miensopust, M.P. et al., 2013 |
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openAccess |
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23 p. application/pdf |
| dc.publisher.none.fl_str_mv |
Royal Astronomical Society |
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Royal Astronomical Society |
| dc.source.none.fl_str_mv |
Articles publicats en revistes (Dinàmica de la Terra i l'Oceà) reponame:Recercat. Dipósit de la Recerca de Catalunya instname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) |
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Recercat. Dipósit de la Recerca de Catalunya |
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Recercat. Dipósit de la Recerca de Catalunya |
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