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

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

doi:https://doi.org/10.5194/angeo-43-271-2025

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

Supplement

https://doi.org/10.5194/angeo-43-271-2025-supplement

Data sets

International Monitor for Auroral Geomagnetic Effects (IMAGE) L. Juusola et al. https://space.fmi.fi/image

Datasets and code for "Multi-site transfer function approach for real-time modeling of the ground electric field induced by laterally-nonuniform ionospheric source" by Kruglyakov et al. (2023) M. Kruglyakov and E. Marshalko https://doi.org/10.5281/zenodo.8402165

GIC recordings in the Finnish natural gas pipeline A. Viljanen https://space.fmi.fi/gic

Model code and software

ApexPy K. M. Laundal et al. https://apexpy.readthedocs.io/en/latest/

PGIEM2G M. Kruglyakov https://gitlab.com/m.kruglyakov/PGIEM2G

Short summary

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.