Results 61 to 70 of about 1,111 (190)

Influence of spatial variations of the geoelectric field on geomagnetically induced currents

Journal of Space Weather and Space Climate, 2017
The geoelectric field driving geomagnetically induced currents (GIC) has complex spatial variations. It follows that different patterns of the field vectors in a given area having the same regional mean can produce very different GIC.
Viljanen Ari, Pirjola Risto
doaj   +1 more source

Simulating Geomagnetically Induced Currents (GICs) in the Irish Power Network

, 2015
Presentation given at ESPM 2014 in Trinity College Dublin.
Blake, Sean, Gallagher, Peter, McCauley, Joe, Jones, Alan, Hogg, Colin, Beggan, Ciaran, Thomson, Alan, Kelly, Gemma, Walsh, Sarah   +8 more
openaire   +1 more source

Development of an Electromagnetic‐Thermal Circuit Model for Single‐Phase Three‐Limb Transformers

High Voltage, Volume 10, Issue 6, Page 1545-1557, December 2025.
ABSTRACT Analysing the heat states of transformers under DC bias requires careful consideration of their own structural and material characteristics. Although the 3D finite element method (FEM) is a reliable way of simulating all the details of transformers, it may be time‐consuming or have encountered convergence difficulties due to the complex ...
Yidan Hu, Jiawen Yu, Zhaoyu Zhang, Xuanrui Zhang, Junhao Li, Roberto Ottoboni   +5 more
wiley   +1 more source

Long-period geomagnetic pulsations as an element of the space weather influence on technologocal systems

Solar-Terrestrial Physics
We analyze variations in geomagnetically induced currents (GIC) and pulsations of the geomagnetic field latitudinal By component in the frequency range 1–20 mHz.
Yagova N. V., Sakharov Y. A., Pilipenko V. A., Selivanov V. N.   +3 more
doaj   +1 more source

Methodology for simulation of geomagnetically induced currents in power systems

Journal of Space Weather and Space Climate, 2014
To assess the geomagnetic hazard to power systems it is useful to be able to simulate the geomagnetically induced currents (GIC) that are produced during major geomagnetic disturbances.
Boteler David
doaj   +1 more source

Space Weather and Power Grids - A Vulnerability Assessment [PDF]

, 2014
Strong geomagnetic disturbances resulting from solar activity can have a major impact on ground-based infrastructures, such as power grids, pipelines and railway systems.
KRAUSMANN Elisabeth, PICCINELLI ROBERTA
core   +1 more source

FHD: An Extended Disturbance Storm‐Time Index Based on Fitted Functions of Horizontal Geomagnetic Field Variation

Journal of Geophysical Research: Space Physics, Volume 130, Issue 11, November 2025.
Abstract The significant decrease in the global horizontal geomagnetic field is a key indicator of global magnetic storms and serves as the fundamental basis for deriving traditional disturbance storm‐time indices in space weather monitoring. The disturbance intensity varies across regions and with magnetic local time, highlighting the need for more ...
Zhaobo He, Liguo Jiao, Gaochuan Liu, Xiaoyu Shen, Jiyao Tu, Weinan Wang, Kunjie Sun   +6 more
wiley   +1 more source

Characterisation of grain orientated electrical steels under high DC biased conditions [PDF]

, 2016
Power transformers are designed to operate under pure AC excitation, however they may be subjected to superimposed DC voltages and consequential offset currents, for example from geomagnetically induced currents, GICs, arising from solar activity.
Anderson, Philip Ian, Harrison, Christopher   +1 more
core   +1 more source

Omega Bands as a Source of Large dB/dt in the Dawn Sector

Journal of Geophysical Research: Space Physics, Volume 130, Issue 11, November 2025.
Abstract Omega band activity has the potential to cause geomagnetically induced currents as they can cause large values of dB/dt $\mathrm{d}B/\mathrm{d}t$. We have undertaken a multi‐instrument study of an omega event which occurred from 13 to 14 November 2012, during a period of southward IMF. Measurements from the European Incoherent SCATter (EISCAT)
R. M. Hodnett, S. E. Milan, S. Nozawa, T. Raita, J. W. Gjerloev, S. K. Vines, L. J. Paxton   +6 more
wiley   +1 more source

Calculation of GIC in the North Island of New Zealand Using MT Data and Thin‐Sheet Modeling

Space Weather, 2020
Geomagnetically induced currents (GICs) in the North Island New Zealand power transmission network during two large magnetic storms are calculated from both magnetotelluric (MT) data and a thin‐sheet conductance model of New Zealand previously used to ...
K. Mukhtar, M. Ingham, C. J. Rodger, D. H. Mac Manus, T. Divett, W. Heise, E. Bertrand, M. Dalzell, T. Petersen   +8 more
doaj   +1 more source