Session CD8 - Measuring and modelling geoelectric fields for GIC studies

Juliane Huebert (British Geological Survey, UK), Joana Alves Ribeiro (University of Coimbra, Portugal), Ciaran Beggan (British Geological Survey, UK), Ellen Clarke, onsite (British Geological Survey, UK)

Large geoelectric fields are induced by variations of the geomagnetic field over a range of periods from seconds to minutes particularly during severe space weather events. Accurate representation of the geoelectric field is vital for correctly estimating Geomagnetically Induced Currents (GICs) in grounded technologies. The geoelectric field can be measured directly using magnetotelluric methods for example or inferred using large-scale conductivity properties of the subsurface. At present, there is a general lack of high-quality data and models specifically for space weather applications. In this session, methods for measuring and modelling the geoelectric field are examined, including new 1D/3D models of conductivity, data collection methodology or resources. We also solicit talks on improvements in real-time modelling of the geoelectric field over wide areas and new techniques for using space weather forecasts to estimate extreme geoelectric values.

Poster Viewing
Thursday October 27, 08:30 - 13:30, Poster Area

Wednesday October 26, 14:15 - 15:15, Earth Hall

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Talks : Time schedule

Wednesday October 26, 14:15 - 15:15, Earth Hall
14:153-D modelling of the geoelectric field and geomagnetically induced currents in Fennoscandia with laterally nonuniform inducing sourcesMarshalko, E et al.Oral
14:30European-wide geo-electric field and geomagnetically induced current modelling developmentsRichardson, G et al.Oral
14:45The assessment of GICs based on time-domain transfer functionsKruglyakov, M et al.Oral
15:00Nowcasting Geoelectric Fields in Ireland using Magnetotelluric Transfer FunctionsMalone-leigh, J et al.Oral


1Geomagnetically induced currents in the German power gridPick, L et al.Poster
2Expected Geomagnetically Induced Currents in the Spanish islands power transmission gridsTorta, J et al.Poster
3Extreme values and return levels of modelled geoelectric fields at the UK observatoriesBeggan, C et al.Poster
4The UK’s long-period magnetotelluric field campaign for improved ground electric field modellingEaton, E et al.Poster