{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,11]],"date-time":"2026-01-11T14:36:48Z","timestamp":1768142208413,"version":"3.49.0"},"reference-count":44,"publisher":"MDPI AG","issue":"10","license":[{"start":{"date-parts":[[2022,5,11]],"date-time":"2022-05-11T00:00:00Z","timestamp":1652227200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"National Natural Science Foundation of China","award":["41630317"],"award-info":[{"award-number":["41630317"]}]},{"name":"National Natural Science Foundation of China","award":["U1812402"],"award-info":[{"award-number":["U1812402"]}]},{"name":"National Natural Science Foundation of China","award":["41904123"],"award-info":[{"award-number":["41904123"]}]},{"name":"National Natural Science Foundation of China","award":["U20A20105"],"award-info":[{"award-number":["U20A20105"]}]},{"name":"National Natural Science Foundation of China","award":["2018GXNSFBA138049"],"award-info":[{"award-number":["2018GXNSFBA138049"]}]},{"name":"National Natural Science Foundation of China","award":["2020GXNSFDA238021"],"award-info":[{"award-number":["2020GXNSFDA238021"]}]},{"name":"National Natural Science Foundation of China","award":["SMIL-2019-04"],"award-info":[{"award-number":["SMIL-2019-04"]}]},{"name":"Natural Science Foundation of Guangxi Province","award":["41630317"],"award-info":[{"award-number":["41630317"]}]},{"name":"Natural Science Foundation of Guangxi Province","award":["U1812402"],"award-info":[{"award-number":["U1812402"]}]},{"name":"Natural Science Foundation of Guangxi Province","award":["41904123"],"award-info":[{"award-number":["41904123"]}]},{"name":"Natural Science Foundation of Guangxi Province","award":["U20A20105"],"award-info":[{"award-number":["U20A20105"]}]},{"name":"Natural Science Foundation of Guangxi Province","award":["2018GXNSFBA138049"],"award-info":[{"award-number":["2018GXNSFBA138049"]}]},{"name":"Natural Science Foundation of Guangxi Province","award":["2020GXNSFDA238021"],"award-info":[{"award-number":["2020GXNSFDA238021"]}]},{"name":"Natural Science Foundation of Guangxi Province","award":["SMIL-2019-04"],"award-info":[{"award-number":["SMIL-2019-04"]}]},{"name":"Hubei Subsurface Multi-Scale Imaging Key Laboratory (China University of Geosciences)","award":["41630317"],"award-info":[{"award-number":["41630317"]}]},{"name":"Hubei Subsurface Multi-Scale Imaging Key Laboratory (China University of Geosciences)","award":["U1812402"],"award-info":[{"award-number":["U1812402"]}]},{"name":"Hubei Subsurface Multi-Scale Imaging Key Laboratory (China University of Geosciences)","award":["41904123"],"award-info":[{"award-number":["41904123"]}]},{"name":"Hubei Subsurface Multi-Scale Imaging Key Laboratory (China University of Geosciences)","award":["U20A20105"],"award-info":[{"award-number":["U20A20105"]}]},{"name":"Hubei Subsurface Multi-Scale Imaging Key Laboratory (China University of Geosciences)","award":["2018GXNSFBA138049"],"award-info":[{"award-number":["2018GXNSFBA138049"]}]},{"name":"Hubei Subsurface Multi-Scale Imaging Key Laboratory (China University of Geosciences)","award":["2020GXNSFDA238021"],"award-info":[{"award-number":["2020GXNSFDA238021"]}]},{"name":"Hubei Subsurface Multi-Scale Imaging Key Laboratory (China University of Geosciences)","award":["SMIL-2019-04"],"award-info":[{"award-number":["SMIL-2019-04"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Remote Sensing"],"abstract":"<jats:p>When interpreting magnetotelluric (MT) data, because of the inherent anisotropy of the earth, considering electrical anisotropy is crucial. Accordingly, using the edge-based finite element method, we calculated the responses of MT data for electrical isotropic and anisotropic models, and subsequently used the anisotropy index and polar plot to depict MT responses. High values of the anisotropy index were mainly yielded at the boundary domains of anomalous bodies for isotropy cases because the conductive differences among isotropic anomalous bodies or among anomalous bodies and background earth can be regarded as macro-anisotropy. However, they only appeared across anomalous bodies in the anisotropy cases. The anisotropy index can directly differentiate isotropy from anisotropy but exhibits difficulty in reflecting the azimuth of the principal conductivities. For the isotropy cases, polar plots are approximately circular and become curves with a big ratio of the major axis to minor axis, such as an 8-shaped curve for the anisotropic earth. Furthermore, the polar plot can reveal the directions of principal conductivities. However, distorted by anomalous bodies, polar plots with a large ratio of the major axis to minor axis occur in isotropic domains around the anomalous bodies, which may lead to the misinterpretation of these domains as anisotropic earth. Therefore, combining the anisotropy index with a polar plot facilitates the identification of the electrical anisotropy.<\/jats:p>","DOI":"10.3390\/rs14102328","type":"journal-article","created":{"date-parts":[[2022,5,12]],"date-time":"2022-05-12T23:08:36Z","timestamp":1652396916000},"page":"2328","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Investigating the Magnetotelluric Responses in Electrical Anisotropic Media"],"prefix":"10.3390","volume":"14","author":[{"given":"Tianya","family":"Luo","sequence":"first","affiliation":[{"name":"Guangxi Beibu Gulf Marine Research Center, Guangxi Academy of Sciences, Nanning 530007, China"},{"name":"Hubei Subsurface Multi-Scale Imaging Key Laboratory, Institute of Geophysics and Geomatics, China University of Geosciences, Wuhan 430074, China"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3623-8304","authenticated-orcid":false,"given":"Xiangyun","family":"Hu","sequence":"additional","affiliation":[{"name":"Hubei Subsurface Multi-Scale Imaging Key Laboratory, Institute of Geophysics and Geomatics, China University of Geosciences, Wuhan 430074, China"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8990-0093","authenticated-orcid":false,"given":"Longwei","family":"Chen","sequence":"additional","affiliation":[{"name":"College of Earth Sciences, Guilin University of Technology, Guilin 541006, China"}]},{"given":"Guilin","family":"Xu","sequence":"additional","affiliation":[{"name":"Key Laboratory of Environment Change and Resources Use in Beibu Gulf, Ministry of Education, Nanning Normal University, Nanning 530001, China"}]}],"member":"1968","published-online":{"date-parts":[[2022,5,11]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"139","DOI":"10.1016\/j.pepi.2010.07.007","article-title":"Dimensionality imprint of electrical anisotropy in magnetotelluric responses","volume":"182","author":"Queralt","year":"2010","journal-title":"Phys. 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