Speaker
Description
Large geomagnetic field variations during geomagnetic storms induce geoelectric currents in the ground which flow through ground-based technology, such as power grids and pipelines. In recent years BGS have been working on improving measurements and models to help quantify the risk of space weather.
We have upgraded our long-term geoelectric field monitoring equipment at the 3 UK observatories, which have now been providing data for over a decade. We have also collected long-period magnetotelluric measurements at 53 new sites, which have been used to improve our geoelectric field models. Additional variometer sites have also been installed to improve the coverage of geomagnetic field measurements across the UK.
With these new data we have been able to upgrade our models and understanding of geomagnetically induced currents (GIC) in the power grid, identifying areas with increased GIC hazard. We have also been able to update our models of pipe-to-soil potential (PSP) in the high-pressure gas transmission system, improving our understanding of the potential for enhanced corrosion and possible safety implications of increased PSP during space weather events.
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