EGU25-17635, updated on 15 Mar 2025
https://doi.org/10.5194/egusphere-egu25-17635
EGU General Assembly 2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Poster | Wednesday, 30 Apr, 14:00–15:45 (CEST), Display time Wednesday, 30 Apr, 14:00–18:00
 
Hall X3, X3.103
Estimation of the high amplitudes of the geoelectric field
Alex Marcuello1,2, Raha Hafizi1,2, Anna Martí1,2, Juanjo Ledo3, Pilar Queralt1,2, and Perla Piña-Varas1,2
Alex Marcuello et al.
  • 1Universidad de Barcelona, Facultat de Ciencies de la Terra, Dept. Dinamica de la Terra i de l'Ocea, Barcelona, Spain (alex.marcuello@ub.edu)
  • 2Inst. Geomodels, Universidad de Barcelona, Barcelona, Spain
  • 3Universidad Complutense de Madrid, Facultad de Física, Depto. de Física de La Tierra y Astrofísica, Madrid, Spain

The geoelectric field depends on the electrical structure of the ground and the time variations of the geomagnetic field, which become more intense during geomagnetic storms. We present a procedure for identifying the areas of higher amplitude of the geoelectric field and determining the orientation of the geomagnetic field needed to produce these higher amplitudes. The technique involves decomposing the tensorial magnetotelluric responses in the frequency domain (e.g., impedance Z) and using the representation of complex vectors. We apply this method to identify these areas in the Iberian Peninsula, using the latest version of the Electrical Resistivity Model of the Iberian Lithosphere (ERMIL). This approach can help assess the potential effects of geomagnetically induced currents (GIC).

How to cite: Marcuello, A., Hafizi, R., Martí, A., Ledo, J., Queralt, P., and Piña-Varas, P.: Estimation of the high amplitudes of the geoelectric field, EGU General Assembly 2025, Vienna, Austria, 27 Apr–2 May 2025, EGU25-17635, https://doi.org/10.5194/egusphere-egu25-17635, 2025.