Reevaluating the necessity of static shift correction in magnetotelluric inversion
Magnetotelluric (MT) is a significant electromagnetic exploration method. However, due to uneven distribution of surface charges and other factors, static shift often affects observed data, reducing the accuracy of inversion and interpretation. Correcting static shift through data processing remains...
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Frontiers Media S.A.
2025-02-01
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| Series: | Frontiers in Earth Science |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/feart.2025.1527004/full |
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| author | Jingzhong Zeng Jingzhong Zeng Xiaobin Chen Xiaobin Chen Peijie Wang Zhongyin Liu Zhongyin Liu Juntao Cai Juntao Cai |
| author_facet | Jingzhong Zeng Jingzhong Zeng Xiaobin Chen Xiaobin Chen Peijie Wang Zhongyin Liu Zhongyin Liu Juntao Cai Juntao Cai |
| author_sort | Jingzhong Zeng |
| collection | DOAJ |
| description | Magnetotelluric (MT) is a significant electromagnetic exploration method. However, due to uneven distribution of surface charges and other factors, static shift often affects observed data, reducing the accuracy of inversion and interpretation. Correcting static shift through data processing remains a challenging task. Based on the characteristic that static shift affects only apparent resistivity data without impacting phase data, this paper proposes an inversion strategy that avoids static shift correction. At sites affected by static shift, apparent resistivity data are excluded, and only phase data are used in the inversion. Synthetic and field data tests indicate that the reduced inclusion of apparent resistivity data has minimal impact on inversion results, and due to the exclusion of data influenced by static shift, the inversion accurately reflects deep anomalous structures. This demonstrates that by excluding apparent resistivity data and relying solely on phase data at static-shifted sites, accurate inversion results can be achieved without additional static shift correction. |
| format | Article |
| id | doaj-art-22d955d031004fb6a715040e9108c9aa |
| institution | Kabale University |
| issn | 2296-6463 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Earth Science |
| spelling | doaj-art-22d955d031004fb6a715040e9108c9aa2025-02-10T06:49:08ZengFrontiers Media S.A.Frontiers in Earth Science2296-64632025-02-011310.3389/feart.2025.15270041527004Reevaluating the necessity of static shift correction in magnetotelluric inversionJingzhong Zeng0Jingzhong Zeng1Xiaobin Chen2Xiaobin Chen3Peijie Wang4Zhongyin Liu5Zhongyin Liu6Juntao Cai7Juntao Cai8National Institute of Natural Hazards, Ministry of Emergency Management of China, Beijing, ChinaKey Laboratory of Compound and Chained Natural Hazards Dynamics, Ministry of Emergency Management of China, Beijing, ChinaNational Institute of Natural Hazards, Ministry of Emergency Management of China, Beijing, ChinaKey Laboratory of Compound and Chained Natural Hazards Dynamics, Ministry of Emergency Management of China, Beijing, ChinaDepartment of Earth and Space Sciences, Southern University of Science and Technology, Shenzhen, ChinaNational Institute of Natural Hazards, Ministry of Emergency Management of China, Beijing, ChinaKey Laboratory of Compound and Chained Natural Hazards Dynamics, Ministry of Emergency Management of China, Beijing, ChinaNational Institute of Natural Hazards, Ministry of Emergency Management of China, Beijing, ChinaKey Laboratory of Compound and Chained Natural Hazards Dynamics, Ministry of Emergency Management of China, Beijing, ChinaMagnetotelluric (MT) is a significant electromagnetic exploration method. However, due to uneven distribution of surface charges and other factors, static shift often affects observed data, reducing the accuracy of inversion and interpretation. Correcting static shift through data processing remains a challenging task. Based on the characteristic that static shift affects only apparent resistivity data without impacting phase data, this paper proposes an inversion strategy that avoids static shift correction. At sites affected by static shift, apparent resistivity data are excluded, and only phase data are used in the inversion. Synthetic and field data tests indicate that the reduced inclusion of apparent resistivity data has minimal impact on inversion results, and due to the exclusion of data influenced by static shift, the inversion accurately reflects deep anomalous structures. This demonstrates that by excluding apparent resistivity data and relying solely on phase data at static-shifted sites, accurate inversion results can be achieved without additional static shift correction.https://www.frontiersin.org/articles/10.3389/feart.2025.1527004/fullmagnetotelluricsinversionapparent resistivityimpedance phasestatic shift |
| spellingShingle | Jingzhong Zeng Jingzhong Zeng Xiaobin Chen Xiaobin Chen Peijie Wang Zhongyin Liu Zhongyin Liu Juntao Cai Juntao Cai Reevaluating the necessity of static shift correction in magnetotelluric inversion Frontiers in Earth Science magnetotellurics inversion apparent resistivity impedance phase static shift |
| title | Reevaluating the necessity of static shift correction in magnetotelluric inversion |
| title_full | Reevaluating the necessity of static shift correction in magnetotelluric inversion |
| title_fullStr | Reevaluating the necessity of static shift correction in magnetotelluric inversion |
| title_full_unstemmed | Reevaluating the necessity of static shift correction in magnetotelluric inversion |
| title_short | Reevaluating the necessity of static shift correction in magnetotelluric inversion |
| title_sort | reevaluating the necessity of static shift correction in magnetotelluric inversion |
| topic | magnetotellurics inversion apparent resistivity impedance phase static shift |
| url | https://www.frontiersin.org/articles/10.3389/feart.2025.1527004/full |
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