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TitleCalculation of induced electric field during a geomagnetic storm using recursive convolution
AuthorMarti, L; Rezaei-Zare, A; Boteler, DORCID logo
SourceIEEE Transactions on Power Delivery (Institute of Electrical and Electronics Engineers) vol. 29, issue 2, 2014 p. 802-807,
Alt SeriesEarth Sciences Sector, Contribution Series 20140020
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Mediapaper; digital; on-line
File formatpdf
Subjectsgeophysics; Health and Safety; electrical properties; geomagnetism; magnetic storms; magnetic field; magnetic field intensity; magnetic induction; conductivity; geoelectric variations; fast Fourier transform (FFT)
Illustrationsgraphs; tables; equations
ProgramPublic Safety Geoscience Northern Canada Geohazards Project
Released2014 04 01
AbstractThe relationship between the chnages in the earth's magnetic field and the induced geoelectric field during a geomagnetic disturbance is a frequency dependent transfer function that depends on earth resistivity at different depths. Traditionally this function is calculated in the frequency domain expressed as an impulse function in the time domain using FFT and convolved with dB/dt in the time domain to estimate the geoelectric field E. This paper proposes the approximation of the transfer function in the frequency domain using rational functions and to carry out the calculation of E from dB/dt using fast recursive convolution methods.
Summary(Plain Language Summary, not published)
Space weather refers to the dynamic conditions on the Sun and in the space environment, in particular, in the near-Earth environment, that can affect critical infrastructure. NRCan operates the Canadian Space Weather Forecast Centre and conducts research into space weather effects on power systems, pipelines, satellites, radio communications and GNSS positioning to help Canadian industry understand and mitigate the effects of space weather. This paper shows how recursive convoltion can be used to calculate the geo-electric fields that can be a hazard to power systems.

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