Geomagnetic field variations are measured continuously at the magnetic observatory of the University Coimbra since 1866. This project addresses one important application of geomagnetic field time series, the assessment of hazard associated with geomagnetically induced currents in high-voltage power lines. To this end, we gather the expertise of different fields of geophysics, engineering and mathematics in order to carry out all the required tasks: identification of different driving sources, calculation of a conductivity model for the Portuguese territory, definition of the electrical and geometrical characteristics of the power grid. In parallel, all field studies and instruments comparaisons will take place in order to accomplish the transfer of the COI station to a new site free of urban electromagnetic noise.
This study is funded by national funds through FCT (Foundation for Science and Technology, I.P.), under the project MAG-GIC: PTDC/CTA - GEO/31744/2017.
MAG-GIC presentation at EGU General Assembly 2020, Vienna | Austria | 3–8 May 2020
MAG-GIC presentation at 10th Spanish-Portuguese Assembly of Geodesy and Geophysics, Toledo | Spain | 26–29 May 2020