Details of the abstract
|Title of paper||Calculating geoelectric fields using a lithospheric resistivity model of the Iberian Peninsula|
|List of authors||Hafizi, R., Martí, A., Piña-Varas, P., Mitjanas, G., Campanyà, J., Marcuello, A., Ledo, J., Queralt, P.|
|Affiliation(s)||Universitat de Barcelona (Spain), Universitat de Barcelona (Spain), Universitat de Barcelona (Spain), Universitat de Barcelona (Spain), South East Technological University (Ireland), Universitat de Barcelona (Spain), Universidad Complutense de Madrid (Spain), Universitat de Barcelona (Spain)|
As part of the IBERGIC-CAST (Modelling and forecasting of Geomagnetically Induced Currents in Spain) multidisciplinary project, funded by the Spanish Research Agency, we aim at improving the geoelectrical resistivity models of the lithosphere below the Iberian Peninsula, and use them to create the geoelectric field hazard maps for different geomagnetic storm scenarios. |
In this work we present the modelling of the geoelectric fields using Magnetotelluric transfer functions computed from measured time series, and calculated from the most recent resistivity model of the Iberian lithosphere. Three-dimensional inversion of Magnetotelluric data and forward modeling give us the required impedances for geoelectric calculations for
the Iberian Peninsula. The interstation function analysis also provides information about the difference of the electrical underground structure between the sites. For the geomagnetic field, we used data from geomagnetic observatories and hypothetical scenarios. Nearest site and Spherical Elementary Currents Systems (SECS) were considered to interpolate geomagnetic fields from magnetic observatories to the sites of interest. The results are analyzed in views of the underlying geology and the coast.
|Session Keyword||3.0 Exploration, Monitoring and Hazards|