1887
Volume 73, Issue 6
  • E-ISSN: 1365-2478
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Abstract

ABSTRACT

Radiomagnetotellurics (RMTs) is an efficient frequency‐domain electromagnetic technique for mapping subsurface electrical resistivity, particularly suited for near‐surface investigations. This method utilizes commonly available civil and military radio transmitters, broadcasting between 10 kHz and 1 MHz, as sources to measure electric and magnetic field responses at the surface. Modern RMT receiver systems comprise five components (two electrical antennas and three magnetic coils), allowing for the estimation of the full impedance tensor and the tipper transfer function for the vertical magnetic field. In this study, RMT data were acquired to investigate the shallow structure of the Himalayan Frontal Thrust (HFT) fault in the Sub‐Himalayan region around Uttarakhand, India. Data were collected at 312 stations along eight profiles over an area of roughly 500 m × 70 m. The dense station distribution enables a 3D inversion of the dataset in the extended frequency range of up to 1 MHz. The observed data were processed using scalar as well as tensor estimations to obtain full impedances and tipper transfer function. We integrated scalar‐estimated data from zones with an approximately 2D conductivity distribution in the full‐tensor dataset. This approach ensured robust 3D modelling during the initial RMT inversion performed with the ModEM algorithm. To date, a joint 3D interpretation of RMT full impedance tensor and tipper transfer function has not yet been reported. Furthermore, the near‐surface manifestations of the HFT have not previously been explored by RMT. The derived 3D model from combined scalar, tensor and tipper data reveals a conductivity contrast zone that aligns well with the HFT fault outcrop and complementary geological information. The derived geo‐electrical structure recovers the local sediment thickness and shallow fault inclination.

© 2025 European Association of Geoscientists & Engineers. © 2025 The Author(s). Geophysical Prospecting published by John Wiley & Sons Ltd on behalf of European Association of Geoscientists & Engineers.
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2025-07-24
2026-02-13

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References

  1. Bastani, M., J.Hübert, T.Kalscheuer, L. B.Pedersen, A.Godio, and J.Bernard. 2012. “2D Joint Inversion of RMT and ERT Data Versus Individual 3D Inversion of Full Tensor RMT Data: An Example From Trecate Site in Italy.” Geophysics77, no. 4: WB233–WB243. https://doi.org/10.1190/GEO2011‐0525.1.
     [Google Scholar]
  2. Bastani, M., and L. B.Pedersen. 2001. “Estimation of Magnetotelluric Transfer Functions From Radio Transmitters.” Geophysics66, no. 4: 1038–1051. https://doi.org/10.1190/1.1487051.
     [Google Scholar]
  3. Bastani, M., A.Savvaidis, L. B.Pedersen, and T.Kalscheuer. 2011. “CSRMT Measurements in the Frequency Range of 1–250 kHz to Map a Normal Fault in the Volvi Basin, Greece.” Journal of Applied Geophysics75, no. 2: 180–195. https://doi.org/10.1016/J.JAPPGEO.2011.07.001.
     [Google Scholar]
  4. Cagniard, L.1953. “Basic Theory of the Magneto‐Telluric Method of Geophysical Prospecting.” Geophysics18, no. 3: 605–635. https://doi.org/10.1190/1.1437915.
     [Google Scholar]
  5. Candansayar, M. E., and B.Tezkan. 2008. “Two‐Dimensional Joint Inversion of Radiomagnetotelluric and Direct Current Resistivity Data.” Geophysical Prospecting56 no. 5: 737–749. https://doi.org/10.1111/J.1365‐2478.2008.00695.X.
     [Google Scholar]
  6. Cantwell, T.1960. “Detection and Analysis of Low Frequency Magnetotelluric Signals.” Doctoral diss., Massachusetts Institute of Technology.
  7. Devi, A., M.Israil, A.Singh, P. K.Gupta, P.Yogeshwar, and B.Tezkan. 2020. “Imaging of Groundwater Contamination Using 3D Joint Inversion of Electrical Resistivity Tomography and Radio Magnetotelluric Data: A Case Study From Northern India.” Near Surface Geophysics18, no. 3: 261–274. https://doi.org/10.1002/NSG.12092.
     [Google Scholar]
  8. Egbert, G. D., and J. R.Booker. 1986. “Robust Estimation of Geomagnetic Transfer Functions.” Geophysical Journal International87, no. 1: 173–194. https://doi.org/10.1111/J.1365‐246X.1986.TB04552.X.
     [Google Scholar]
  9. Egbert, G. D., and A.Kelbert. 2012. “Computational Recipes for Electromagnetic Inverse Problems.” Geophysical Journal International189, no. 1: 251–267. https://doi.org/10.1111/J.1365‐246X.2011.05347.X/3/189‐1‐251.
     [Google Scholar]
  10. Fadavi Asghari, S., A.Shlykov, M.Smirnova, A.Saraev, P.Yogeshwar, and B.Tezkan. 2023. “Multidimensional Interpretation of Radiomagnetotellurics and Controlled‐Source Radiomagnetotellurics Data: A Validation Study.” Near Surface Geophysics21, no. 4: 300–313. https://doi.org/10.1002/nsg.12257.
     [Google Scholar]
  11. Farquharson, C. G., D. W.Oldenburg, E.Haber, and R.Shekhtman. 2002. “An Algorithm for the Three‐Dimensional Inversion of Magnetotelluric Data.” SEG Technical Program Expanded Abstracts2002: 649–652. https://doi.org/10.1190/1.1817336.
     [Google Scholar]
  12. Gamble, T. D., W. M.Goubau, and J.Clarke. 1979. “Magnetotellurics With a Remote Magnetic Reference.” Geophysics44: 53–68.
     [Google Scholar]
  13. Goldstein, M. A., and D. W.Strangway1975. “Audio‐Frequency Magnetotellurics With a Grounded Electric Dipole Source.” Geophysics40, no. 4: 669–683. https://doi.org/10.1190/1.1440558.
     [Google Scholar]
  14. Grayver, A. V.2015. “Parallel Three‐Dimensional Magnetotelluric Inversion Using Adaptive Finite‐Element Method. Part I: Theory and Synthetic Study.” Geophysical Journal International202, no. 1: 584–603. https://doi.org/10.1093/GJI/GGV165.
     [Google Scholar]
  15. Israil, M., D. K.Tyagi, P. K.Gupta, and S.Niwas. 2008. “Magnetotelluric Investigations for Imaging Electrical Structure of Garhwal Himalayan corridor, Uttarakhand, India.” Journal of Earth System Science117, no. 3: 189–200. https://doi.org/10.1007/S12040‐008‐0023‐0/METRICS.
     [Google Scholar]
  16. Kelbert, A., N.Meqbel, G. D.Egbert, and K.Tandon. 2014. “ModEM: A Modular System for Inversion of Electromagnetic Geophysical Data.” Computers & Geosciences66: 40–53. https://doi.org/10.1016/J.CAGEO.2014.01.010.
     [Google Scholar]
  17. Kumar, S., S. G.Wesnousky, R.Jayangondaperumal, T.Nakata, Y.Kumahara, and V.Singh. 2010. “Paleoseismological Evidence of Surface Faulting Along the Northeastern Himalayan front, India: Timing, Size, and Spatial Extent of Great Earthquakes.” Journal of Geophysical Research: Solid Earth115, no. B12. https://doi.org/10.1029/2009JB006789.
     [Google Scholar]
  18. Kumar, S., S. G.Wesnousky, T. K.Rockwell, R. W.Briggs, V. C.Thakur, and R.Jayangondaperumal. 2006. “Paleoseismic Evidence of Great Surface Rupture Earthquakes Along the Indian Himalaya.” Journal of Geophysical Research: Solid Earth111, no. B3: 3304. https://doi.org/10.1029/2004JB003309.
     [Google Scholar]
  19. Le Fort, P.1975. “Himalayas: The Collided Range. Present Knowledge of the Continental Arc.” American Journal of Science275: 1–44.
     [Google Scholar]
  20. Linde, N., and L. B.Pedersen. 2004. “Characterization of a Fractured Granite Using Radiomagnetotelluric (RMT) Data.” Geophysics69, no. 5: 1155–1165. https://doi.org/10.1190/1.1801933.
     [Google Scholar]
  21. Malehmir, A., M.Andersson, S.Mehta, et al. 2016. “Post‐Glacial Reactivation of the Bollnäs fault, central Sweden—A Multidisciplinary Geophysical Investigation.” Solid Earth7, no. 2: 509–527. https://doi.org/10.5194/SE‐7‐509‐2016.
     [Google Scholar]
  22. Meqbel, N. M., G. D.Egbert, P. E.Wannamaker, A.Kelbert, and A.Schultz. 2014. “Deep Electrical Resistivity Structure of the Northwestern U.S. Derived From 3‐D Inversion of USArray Magnetotelluric Data.” Earth and Planetary Science Letters402, no. C: 290–304. https://doi.org/10.1016/J.EPSL.2013.12.026.
     [Google Scholar]
  23. Miglani, R., M.Shahrukh, M.Israil, P. K.Gupta, S. K.Varshney, and S.Elena. 2014. “Geoelectric Structure Estimated From Magnetotelluric Data From the Uttarakhand Himalaya, India.” Journal of Earth System Science123, no. 8: 1907–1918. https://doi.org/10.1007/S12040‐014‐0504‐2.
     [Google Scholar]
  24. Molnar, P.1990. “A Review of the Seismicity and the Rate of Active Underthrusting and Deformation at the Himalaya.” Journal of Himalayan Geology1, no. 2: 131–154.
     [Google Scholar]
  25. Newman, G. A., S.Recher, B.Tezkan, and F. M.Neubauer. 2003. “3D Inversion of a Scalar Radio Magnetotelluric Field Data Set.” Geophysics68, no. 3: 791–802. https://doi.org/10.1190/1.1581032.
     [Google Scholar]
  26. Pedersen, L. B.1982. “The Magnetotelluric Impedance Tensor—Its Random and Bias Errors.” Geophysical Prospecting30, no. 2: 188–210. https://doi.org/10.1111/j.1365‐2478.1982.tb01298.x.
     [Google Scholar]
  27. Pedersen, L. B., M.Bastani, and L.Dynesius. 2006. “Some Characteristics of the Electromagnetic Field From Radio Transmitters in Europe.” Geophysics71, no. 6: G279–G284. https://doi.org/10.1190/1.2349222.
     [Google Scholar]
  28. Raiverman, V., A.Mukerjea, M. K.Saproo, S. V.Kunte, and J.Ram. 1990. Geological Map of Himalayan Foothills Between Yamuna and Sarda Rivers. Keshava Deva Malaviya Institute of Petrolium Exploration, Oil and Natural Gas Corporation.
     [Google Scholar]
  29. Rajendran, C. P., B.John, and K.Rajendran. 2015. “Medieval Pulse of Great Earthquakes in the Central Himalaya: Viewing Past Activities on the Frontal Thrust.” Journal of Geophysical Research: Solid Earth120, no. 3: 1623–1641. https://doi.org/10.1002/2014JB011015.
     [Google Scholar]
  30. Saraev, A., A.Simakov, A.Shlykov, and B.Tezkan. 2017. “Controlled Source Radiomagnetotellurics: A Tool for Near Surface Investigations in Remote Regions.” Journal of Applied Geophysics146: 228–237. https://doi.org/10.1016/J.JAPPGEO.2017.09.017.
     [Google Scholar]
  31. Shlykov, A.2018. EMP: Electromagnetic Processor. https://www.csrmt.info.
  32. Smirnova, M., A.Shlykov, S.Fadavi Asghari, et al. 2023. “3D Controlled‐Source Electromagnetic Inversion in the Radio‐Frequency Band.” Geophysics88, no. 1: E1–E12. https://doi.org/10.1190/geo2021‐0626.1.
     [Google Scholar]
  33. Spies, B. R.1989. “Depth of Investigation in Electromagnetic Sounding Methods.” Geophysics54, no. 7: 872–888. https://doi.org/10.1190/1.1442716.
     [Google Scholar]
  34. Srivastava, V., M.Mukul, and J. B.Barnes. 2016. “Main Frontal Thrust Deformation and Topographic Growth of the Mohand Range, Northwest Himalaya.” Journal of Structural Geology93: 131–148. https://doi.org/10.1016/J.JSG.2016.10.009.
     [Google Scholar]
  35. Tezkan, B.1999. “A Review of Environmental Applications of Quasi‐Stationary Electromagnetic Techniques.” Surveys in Geophysics20, no. 3–4: 279–308. https://doi.org/10.1023/A:1006669218545.
     [Google Scholar]
  36. Tezkan, B.2009. “Radiomagnetotellurics.” In Groundwater Geophysics. Springer. https://doi.org/10.1007/978‐3‐540‐88405‐7_10.
     [Google Scholar]
  37. Widodo, and Tezkan, B.2015. “Analysis of the Shallow Structures of Active Fault Zones Using 3D Radiomagnetotelluric Data Set.” Procedia Earth and Planetary Science12: 68–76. https://doi.org/10.1016/J.PROEPS.2015.03.037.
     [Google Scholar]
  38. Tezkan, B., A.Hördt, and M.Gobashy. 2000. “Two‐Dimensional Radiomagnetotelluric Investigation of Industrial and Domestic Waste Sites in Germany.” Journal of Applied Geophysics44, no. 2–3: 237–256. https://doi.org/10.1016/S0926‐9851(99)00014‐2.
     [Google Scholar]
  39. Tezkan, B., I.Muttaqien, and A.Saraev. 2019. “Mapping of Buried Faults Using the 2D Modelling of Far‐Field Controlled Source Radiomagnetotelluric Data.” Pure and Applied Geophysics176, no. 2: 751–766. https://doi.org/10.1007/S00024‐018‐1980‐0.
     [Google Scholar]
  40. Tezkan, B., and A.Saraev. 2008. “A New Broadband Radiomagnetotelluric Instrument: Applications to near Surface Investigations.” Near Surface Geophysics6, no. 4: 245–252. https://doi.org/10.3997/1873‐0604.2008019.
     [Google Scholar]
  41. Thakur, V. C.2013. “Active Tectonics of Himalayan Frontal Fault System.” International Journal of Earth Sciences102, no. 7: 1791–1810. https://doi.org/10.1007/S00531‐013‐0891‐7.
     [Google Scholar]
  42. Thakur, V. C., and A. K.Pandey. 2004. “Active Deformation of Himalayan Frontal Thrust and Piedmont Zone South of Dehradun in Respect of Seismotectonics of Garhwal Himalaya.” Himalayan Geology25, no. 1: 23–31.
     [Google Scholar]
  43. Tietze, K., and O.Ritter. 2013. “Three‐Dimensional Magnetotelluric Inversion in Practice‐the Electrical Conductivity Structure of the San Andreas Fault in Central California.” Geophysical Journal International195, no. 1: 130–147. https://doi.org/10.1093/GJI/GGT234.
     [Google Scholar]
  44. Turberg, P., I.Müller, and F.Flury. 1994. “Hydrogeological Investigation of Porous Environments by Radio Magnetotelluric‐Resistivity (RMT‐R 12–240 kHz).” Journal of Applied Geophysics31, no. 1–4: 133–143. https://doi.org/10.1016/0926‐9851(94)90052‐3.
     [Google Scholar]
  45. Unsworth, M. J., A. G.Jones, W.Wei, et al. 2005. “Crustal Rheology of the Himalaya and Southern Tibet Inferred From Magnetotelluric Data.” Nature438, no. 7064: 78–81. https://doi.org/10.1038/nature04154.
     [Google Scholar]
  46. Valdiya, K. S.1973. “Tectonic Framework of India: A Review and Interpretation of Recent Structural and Tectonic Studies.” Geophysical Research Bulletin1179–114.
     [Google Scholar]
  47. Verma, G. S.1974. “Structure of the Foot‐Hills of the Himalayas.” Pure and Applied Geophysics Pageoph112, no. 1: 18–26. https://doi.org/10.1007/BF00875913/METRICS.
     [Google Scholar]
  48. Vozoff, K.1972. “The Magnetotelluric Method in the Exploration of Sedimentary Basins.” Geophysics37, no. 1: 98–141. https://doi.org/10.1190/1.1440255.
     [Google Scholar]
  49. Wesnousky, S. G., S.Kumar, R.Mohindra, and V. C.Thakur. 1999. “Uplift and Convergence Along the Himalayan Frontal Thrust of India.” Tectonics18, no. 6: 967–976. https://doi.org/10.1029/1999TC900026.
     [Google Scholar]
  50. Yeats, R. S., and V. C.Thakur. 2008. “Active Faulting South of the Himalayan Front: Establishing a New Plate Boundary.” Tectonophysics453, no. 1–4: 63–73. https://doi.org/10.1016/j.tecto.2007.06.017.
     [Google Scholar]
  51. Yogeshwar, P., B.Tezkan, M.Israil, and M. E.Candansayar. 2012. “Groundwater Contamination in the Roorkee Area, India: 2D Joint Inversion of Radiomagnetotelluric and Direct Current Resistivity Data.” Journal of Applied Geophysics76: 127–135. https://doi.org/10.1016/j.jappgeo.2011.11.001.
     [Google Scholar]
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3D Inversion of Radiomagnetotelluric Data From the Sub‐Himalayan Fault Zone, India—Combining Scalar, Tensor and Tipper Transfer Functions
Geophysical Prospecting 73, e70058 (2025); https://doi.org/10.1111/1365-2478.70058
/content/journals/10.1111/1365-2478.70058
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  • Article Type: Research Article
Keyword(s): 3D inversion; electromagnetics; Himalaya; radiomagnetotellurics; tensor processing; tipper

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