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Abstract

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.

NEWS:

  • Wednesday 5th February: talk from Diana Saturnino in 'Café com Física' (Department of Physics), at 14:00. Diana Saturnino, LPGNantes

    • Title: Measuring the ever-changing geomagnetic field

      • Abstract "The Earth's magnetic field is essential for life on our planet by protecting us from the harmful solar wind. It is a phenomenon resulting from the suporposition of several different sources, continously varying in space and time. Our understanding of its origin in the Earth's core and the reasons for its variations are still limited. From the first use of the compass to today's use in navigation, the geomagnetic field is also present in our daily lives. It is then an important task to observe and measure the ever-changing geomagnetic field the most accurately as possible. The different kinds of geomagnetic field measurements are going to be presented, from terrestial observations at ground observatories to the latest ESA satellite Swarm mission measurements. Comparison between them and their complementarity are also to be discussed.”
  • Friday 7th February: ‘hands-on’ activity at Observatório Geofísico e Astronómico, at 14:30: Diana Saturnino, LPGNantes

    • Title: Introduction to VirES for Swarm and available Swarm data products

      • Abstract: VirES for Swarm is an interactive data manipulation and retrieval interface for the ESA Swarm constellation mission products. It includes tools for studying various geomagnetic models by comparing them to the Swarm satellite measurements at given space weather and ionospheric conditions. It can be accessed by a web client and it also has a python client that can be used with a jupyter notebook. I will briefly present the VirEs environment as an opportunity to discuss the diverse world of Swarm data and derived products.
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