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Multi-site transfer function approach for real-time modeling of the ground electric field induced by laterally-nonuniform ionospheric source
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  • Mikhail Kruglyakov,
  • Elena Marshalko,
  • Alexey Kuvshinov,
  • Maxim Yu Smirnov,
  • Ari Viljanen
Mikhail Kruglyakov
University of Otago

Corresponding Author:m.kruglyakov@gmail.com

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Elena Marshalko
Finnish Meteorological Institute
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Alexey Kuvshinov
Institute of Geophysics
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Maxim Yu Smirnov
Luleå University of Technology
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Ari Viljanen
Finnish Meteorological Institute
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Abstract

We propose a novel approach to model the ground electric field (GEF) induced by laterally-nonuniform ionospheric sources in the real-time. The approach exploits the multi-site transfer function concept, continuous magnetic field measurements at multiple sites in the region of interest, and spatial modes describing the ionospheric source. We compared the modeled GEFs with those measured at two locations in Fennoscandia and observed good agreement between modeled and measured GEF. Besides, we compared GEF-based geomagnetically induced current (GIC) with that measured at the M\“ants\”al\”a natural gas pipeline recording point and again observed remarkable agreement between modeled and measured GIC.
07 Jul 2023Submitted to ESS Open Archive
08 Jul 2023Published in ESS Open Archive