Details of the Abstract
| Title of paper | Electric Fields Estimation from the Solar Storm of May 2024 Using an Updated Lithospheric Resistivity Model of the Iberian Peninsula |
| List of authors | Hafizi, R., Martí, A., Marcuello, A., Piña Varas. P., Queralt, P., Campanyà, J., Ledo, J., Alves Ribeiro, J. |
| Affiliation(s) |
Institut Geomodels, Dept. Dinàmica de la Terra i de l'Oceà , Universitat de Barcelona, Spain, Institut Geomodels, Dept. Dinàmica de la Terra i de l'Oceà , Universitat de Barcelona, Spain, Institut Geomodels, Dept. Dinàmica de la Terra i de l'Oceà , Universitat de Barcelona, Spain, Institut Geomodels, Dept. Dinàmica de la Terra i de l'Oceà , Universitat de Barcelona, Spain, Institut Geomodels, Dept. Dinàmica de la Terra i de l'Oceà , Universitat de Barcelona, Spain, Environmental Water, MKO, Ireland, Physics of the Earth and Astrophysics, Faculty of Physics, Universidad Complutense de Madrid, Spain, University of Coimbra, CITEUC, Department of Physics, Coimbra, Portugal |
| Summary |
During heightened solar activity, anomalous electric fields are induced within the Earth, generating Geomagnetically Induced Currents (GICs) that affect electrical distribution networks, even in moderate latitudes. The estimation of induced electric fields, which generate GICs, relies on a deep understanding of the region's lithospheric resistivity distribution. In our efforts to improve the electrical resistivity models of the Iberian Peninsula, we have recently gathered new long-period magnetotelluric (MT) data from areas where the previous models needed more information. We enhanced our existing prior model through three-dimensional inversion techniques including this new data, and addressed data gaps in previously underexplored areas. For the solar storm of May 2024, we modeled the induced electric fields using the model impedances (Z) and the measured geomagnetic fields (B). In regions where, direct measurements of B were not available, we employed the Spherical Elementary Currents Systems (SECS) method. This method allowed us to estimate B by extrapolating data from magnetic observatories to the targeted areas, a crucial step in assessing the magnitude and distribution of GICs across the region. The results of our induced electric field modeling have been incorporated into preliminary hazard maps, which help classify regions based on the intensity and direction of induced electric fields during severe solar events. These maps are valuable tools for evaluating and designing infrastructure to withstand this phenomenon's impacts. |
| Session Keyword | 5.0 Monitoring: of GICs, environmental, tectonic and geomorphological hazards |
| File upload |
5.0_electric_fields_estimatio_hafizi_04.pdf
5O02.pdf |