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Long Period Magnetotellurics (MT) using Geomagnetically Induced Currents in the Scottish Power Network

McKay, Allan; Pulkkinen, Antti; Thomson, Alan. 2007 Long Period Magnetotellurics (MT) using Geomagnetically Induced Currents in the Scottish Power Network. [Poster] In: XXIV IUGG General Assembly, Perugia, Italy, July 2007. (Unpublished)

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Abstract/Summary

Geomagnetically Induced Currents (GIC) which flow in technological systems such as power transmission grids, are a consequence of the geoelectric field induced at the surface of the Earth during geomagnetic storms. We use an electrical model of the power network, measured GIC data and geomagnetic data from Eskdalemuir observatory to estimate the MT parameters apparent resistivity and phase. The long period MT responses are generally smooth and stable over a period range which extends from about 200-40,000s. We invert the apparent resistivity and phase for a smooth 1D resistivity model using an Occam algorithm.

Item Type: Publication - Conference Item (Poster)
Programmes: BGS Programmes > Seismology and Geomagnetism
NORA Subject Terms: Earth Sciences
Date made live: 26 Oct 2012 08:56
URI: http://nora.nerc.ac.uk/id/eprint/20109

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