Annales Geophysicae
Annales Geophysicae
ANGEO
Articles | Volume 43, issue 1
Articles | Volume 43, issue 1
https://doi.org/10.5194/angeo-43-271-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/angeo-43-271-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 43, issue 1
Regular paper
 | 
27 May 2025
Regular paper |  | 27 May 2025

Estimation of the 3-D geoelectric field at the Earth's surface using spherical elementary current systems

Liisa Juusola, Heikki Vanhamäki, Elena Marshalko, Mikhail Kruglyakov, and Ari Viljanen

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Cited articles

Amm, O.: Ionospheric elementary current systems in spherical coordinates and their application, J. Geomagn. Geoelectr., 49, 947–955, https://doi.org/10.5636/jgg.49.947, 1997. a, b, c, d
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Brändlein, D., Lühr, H., and Ritter, O.: Direct penetration of the interplanetary electric field to low geomagnetic latitudes and its effect on magnetotelluric sounding, J. Geophys. Res., 117, A11314, https://doi.org/10.1029/2012JA018008, 2012. a, b
Cordell, D., Unsworth, M. J., Lee, B., Hanneson, C., Milling, D. K., and Mann, I. R.: Estimating the geoelectric field and electric power transmission line voltage during a geomagnetic storm in Alberta, Canada using measured magnetotelluric impedance data: The influence of three-dimensional electrical structures in the lithosphere, Space Weather, 19, e2021SW002803, https://doi.org/10.1029/2021SW002803, 2021. a
Dimmock, A. P., Rosenqvist, L., Hall, J.-O., Viljanen, A., Yordanova, E., Honkonen, I., André, M., and Sjöberg, E. C.: The GIC and geomagnetic response over Fennoscandia to the 7–8 September 2017 geomagnetic storm, Space Weather, 17, 989–1010, https://doi.org/10.1029/2018SW002132, 2019. a
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Interaction between the magnetic field of the rapidly varying electric currents in space and the conducting ground produces an electric field at the Earth's surface. This geoelectric field drives geomagnetically induced currents in technological conductor networks, which can affect the performance of critical ground infrastructure such as electric power transmission grids. We have developed a new method suitable for monitoring the geoelectric field based on ground magnetic field observations.
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