Results 81 to 90 of about 1,119 (190)

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

Geomagnetically Induced Current Modeling in New Zealand: Extreme Storm Analysis Using Multiple Disturbance Scenarios and Industry Provided Hazard Magnitudes

Space Weather, 2022
Geomagnetically induced currents (GICs) are induced in electrical power transmission networks during geomagnetic disturbances. Understanding the magnitude and duration of the GIC expected during worst‐case extreme storm scenarios is vital to estimate ...
D. H. Mac Manus, C. J. Rodger, M. Dalzell, A. Renton, G. S. Richardson, T. Petersen, M. A. Clilverd   +6 more
doaj   +1 more source

Geomagnetic observatories: monitoring the Earth’s magnetic and space weather environment [PDF]

, 2014
Geomagnetism research provides insight into the Earth’s properties and processes, from the core out to space. For this reason continuous geomagnetic field observations have been carried out in the UK for more than 170 years. Geomagnetism also has diverse
Thomson, Alan W.P.
core   +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

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

Progress in space weather modeling in an operational environment [PDF]

, 2013
YesThis paper aims at providing an overview of latest advances in space weather modeling in an operational environment in Europe, including both the introduction of new models and improvements to existing codes and algorithms that address the broad range
Aguado, Ahmed, Andonov, Aran, Araujo-Pradere, Araujo-Pradere, Arge, Balch, Barra, Belehaki, Belehaki, Belehaki, Belehaki, Belehaki, Belehaki, Belehaki, Bergeot, Bruinsma, Bruyninx, Cid, Colak, Colak, Colak, Corney, Degtyarev, Degtyarev, Dow, Egorova, Feltens, Fuller-Rowell, Higgins, Hochegger, Hoque, Hoque, Houminer, Jacchia, Jakowski, Jakowski, Jakowski, Koutroumbas, Kutiev, Kutiev, Kutiev, Kutiev, Kutiev, Kutiev, Kutiev, Lathuillere, Lei, Leitinger, Lilensten, Makarova, Mares, Messerotti, Mikhailov, Mikhailov, Muhtarov, Nava, Núñez, Pietrella, Pizzo, Potapov, Pulkkinen, Radicella, Reitz, Saiz, Stanislawska, Tinsley, Tonev, Tonev, Tsagouri, Tsagouri, Tsagouri, Tsagouri, Tsagouri, Vainio, Velinov, Velinov, Velinov, Velinov, Velinov, Velinov, Velinov, Velinov, Velinov, Verbeeck, Viljanen, Viljanen, Watermann, Watermann, Wing, Wintoft, Wrenn, Wrenn, Wu, Zolesi, Zolesi, Ünal   +97 more
core   +5 more sources

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

Geomagnetically induced current modelling in New Zealand: Multiple disturbance scenario analysis using industry-provided GIC hazard thresholds

, 2023
The 28th IUGG General Assembly (IUGG2023) (Berlin 2023)
Mac Manus, D., Rodger, C., Dalzell, M., Renton, A., Richardson, G., Petersen, T., Clilverd, M.   +6 more
openaire   +2 more sources

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

Topology Control Analysis Mitigations for Geomagnetically Induced Currents [PDF]

, 2016
Geomagnetic disturbances (GMD) are caused by corona mass ejections (CMEs) from the sun. These solar CMEs cause changes in the earths magnetic field, which in turn produce non-uniform electric fields.
Padilla, Jamie
core