Results 91 to 100 of about 1,531 (194)

LiveWire: Horizontal Geoelectric Field Prediction With 1‐hr Lead‐Time Using Multi‐Fidelity Boosted Neural Networks

Journal of Geophysical Research: Machine Learning and Computation
Geomagnetically Induced Currents (GICs) are electrical currents generated by rapid changes in the geomagnetic field during space weather events, posing risks to power grids and pipelines.
A. Hu, E. Camporeale, G. Lucas, T. Berger   +3 more
doaj   +1 more source

Spatial Resolution Requirements for FDTD Modeling of Geoelectric Fields

Journal of Geophysical Research: Space Physics
AbstractTo ensure the robustness of both civilian and military infrastructure, it is important to protect electric power grids, smart grids, and other electrotechnologies from known and possibly as‐of‐yet unknown space weather hazards. Space weather can generate intense geoelectric fields at the surface of the Earth, as well as large voltage gradients ...
Prashanna Sharma Paneru, Jamesina J. Simpson, Mark B. Moldwin   +2 more
openaire   +1 more source

Geophysical Frequency Domain Electromagnetic Field Simulation Using Physics-Informed Neural Network

Mathematics
Simulating electromagnetic (EM) fields can obtain the EM responses of geoelectric models at different times and spaces, which helps to explain the dynamic process of EM wave propagation underground.
Bochen Wang, Zhenwei Guo, Jianxin Liu, Yanyi Wang, Fansheng Xiong   +4 more
doaj   +1 more source

Estimating geoelectric fields for geoelectric hazard assessment: an examination of data and models within complex physiographic zones

, 2019
Includes bibliographical references.2019 Summer.During magnetic storms, time-varying geomagnetic fields induce geoelectric fields at the surface that produce geomagnetically induced currents (GICs) within power transmission systems.
Cuttler, Stephen W.
core  

Extreme value statistics applied to geoelectric activity in Europe ... a first look [PDF]

, 2013
The Nagycenk observatory now has more than 50 years of geoelectric (or telluric) field data. In this poster we apply the technique of extreme value statistics to these data to determine the 1 in 100 and 1 in 200 year peak values of the surface electric
Kelly, Gemma, Orsi Baillie, Alan Thomson Tamás Nagy, Dawson, Ewan, Nagy, Tamás, Ewan Dawson, Gemma Kelly, Thomson, Alan, Clarke, Ellen, Ellen Clarke, Wesztergom, Victor, Viktor Wesztergom, Baillie, Orsi   +12 more
core  

Mid‐Latitude Geoelectric Field Response in North China During the May 2024 Superstorm: Effects of Geological Heterogeneity

Space Weather
Geoelectric field disturbances during geomagnetic storms pose growing risks to mid‐latitude power systems, yet direct observations remain limited.
Fangyuan Ma, Hui Wang, Yonglin Tan, Yingdu Huang, Hongwei Xia, Darcy Cordell   +5 more
doaj   +1 more source

Poorly studied phenomena in geoelectrics

Записки Горного института, 2016
Undoubtedly, modern geoelectric technologies emerge in the result of the development of traditional approaches and techniques. However of more interest is the appearance of completely new technologies based on new effects and new models of interaction of
V. S. Mogilatov
doaj   +1 more source

Numerical Calculation of Geoelectric Fields That Affect Critical Infrastructure

International Journal of Geosciences, 2019
One of the modern applications of geomagnetism is determining the effect of geomagnetic disturbances on critical infrastructure such as power systems and pipelines. Assessing the geomagnetic hazard to such systems requires calculation of the geoelectric fields produced during geomagnetic disturbances.
David H. Boteler, Risto J. Pirjola
openaire   +2 more sources

Estimation of the 3-D geoelectric field at the Earth's surface using spherical elementary current systems [PDF]

The geoelectric field drives geomagnetically induced currents (GICs) in technological conductor networks, which can affect the performance of critical ground infrastructure such as electric power transmission grids.
Marshalko, Elena, Viljanen, Ari, Vanhamäki, Heikki, Juusola, Liisa, Kruglyakov, Mikhail   +4 more
core   +1 more source

Extended study of extreme geoelectric field event scenarios for geomagnetically induced current applications

Space Weather, 2013
Geomagnetically induced currents (GIC) flowing in man‐made ground technological systems are a direct manifestation of adverse space weather. Today, there is great concern over possible geomagnetically induced current effects on power transmission ...
Chigomezyo M. Ngwira, Antti Pulkkinen, Victoria Wilder, Geoffrey Crowley   +3 more
doaj   +1 more source