Results 51 to 60 of about 1,111 (190)

Assessment of the geomagnetically induced currents impact on the power transformers cores of the Altai Republic 110 kV power grid [PDF]

E3S Web of Conferences
Based on the Baigazan magnetic station data located in Altai, geomagnetically induced currents (GIC) in primary windings of transformers in the southern part of the Altai Republic power system were calculated during a strong magnetic storm on April 24 ...
Uchaikin Evgeniy, Gvozdarev Alexey, Kudryavtsev Nikolay   +2 more
doaj   +1 more source

Geomagnetic Pulsations Driving Geomagnetically Induced Currents

Space Weather, 2021
Geomagnetically induced currents (GICs) are driven by the geoelectric field induced by fluctuations of Earth's magnetic field. Drivers of intense GICs are often associated with large impulsive events such as coronal mass ejections.
M. J. Heyns, S. I. Lotz, C. T. Gaunt
doaj   +1 more source

Modelling the effects of space weather at the Earth’s surface : a UK geoelectric field model [PDF]

, 2004
Geomagnetically Induced Currents (GIC), which can 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.
Clarke, Ellen, McKay, Allan, Reay, Sarah, Thomson, Alan   +3 more
core  

UHV AC/DC power grid geomagnetically induced currents harmonic characteristics analysis

International Journal of Electrical Power & Energy Systems
The power grid’s geomagnetically induced currents (GIC) during geomagnetic storms, are associated with a broad and abrupt harmonic impact, with the potential for grid paralysis and extensive power outages in severe scenarios.
Peng Li, Peihong Yang, Jianfeng Liu, Zilei Zhang, Xizhi Shi, Lianguang Liu   +5 more
doaj   +1 more source

Regional estimation of geomagnetically induced currents based on the local magnetic or electric field

Journal of Space Weather and Space Climate, 2015
Previous studies have demonstrated a close relationship between the time derivative of the horizontal geomagnetic field vector (dH/dt) and geomagnetically induced currents (GIC) at a nearby location in a power grid.
Viljanen Ari, Wintoft Peter, Wik Magnus
doaj   +1 more source

April 2000 geomagnetic storm: ionospheric drivers of large geomagnetically induced currents [PDF]

Annales Geophysicae, 2003
Geomagnetically induced currents (GIC) flowing in technological systems on the ground are a direct manifestation of space weather. Due to the proximity of very dynamic ionospheric current systems, GIC are of special interest at high latitudes ...
A. Pulkkinen, A. Thomson, E. Clarke, A. McKay   +3 more
doaj   +1 more source

Investigating Geomagnetic Disturbances in the Expansion Phase of Strong Substorms

Journal of Geophysical Research: Space Physics, Volume 130, Issue 12, December 2025.
Abstract This study contributes to improved space weather forecasting by investigating geomagnetic disturbances (GMDs) associated with rapid decreases in the SuperMAG Auroral Electrojet Lower (SML) index during strong substorms (SML < ${< } $ −500 nT) at high latitudes (64° ${}^{\circ}$–75° ${}^{\circ}$ MLAT).
Sanjay Kumar, Mark B. Moldwin, James M. Weygand, M. J. Engebretson   +3 more
wiley   +1 more source

Proximity Effects of Lateral Conductivity Variations on Geomagnetically Induced Electric Fields

IEEE Access, 2019
During a magnetic storm, the induced geoelectric field drives geomagnetically induced currents (GIC) in power transmission networks, railway systems, and pipelines, negatively affecting these systems.
Chunming Liu, Xuan Wang, Chenxiang Lin, Jingyu Song   +3 more
doaj   +1 more source

Influence of Tectonic and Geological Structure on GIC in Southern South Island, New Zealand

Space Weather, 2023
As part of a 5‐year project to assess the risk posed by geomagnetically induced currents (GIC) to the New Zealand electrical transmission network, long‐period magnetotelluric (MT) measurements have been made at 62 sites in southern South Island of New ...
M. Ingham, K. Pratscher, W. Heise, E. Bertrand, M. Kruglyakov, C. J. Rodger   +5 more
doaj   +1 more source

MHD Forecasting of Solar Wind With Coronal Mass Ejections

Space Weather, Volume 23, Issue 12, December 2025.
Abstract We present a model, implemented as an online service, for predicting the speed and density of solar wind in the inner heliosphere and near Earth. The model is based on a numerical magnetohydrodynamics code PLUTO. The inner boundary maps are continuously obtained from the National Centers for Environmental Prediction, where they are updated 1 ...
S. Arutyunyan, A. Kodukov, M. Subbotin, D. Pavlov   +3 more
wiley   +1 more source