Results 71 to 80 of about 2,634 (220)

Optimizing Panning Operating Parameters for Alluvial Gold Processing: The Case of the Wakaso Panning Plant

Engineering Reports, Volume 7, Issue 11, November 2025.
The best configuration corresponding to the optimal rate of site handmade panning of gold gravel is obtain by using experimental plan and machine learning. The optimization of alluvial gold yield by genetic algorithms showed that the best configuration of 86.217% at a 10° slope and a 5 tr/min rotation speed.
Harouna Boukari, Luc Leroy Mambou Ngueyep, André Sini, Serges Augustin Ambani Ngueyap, Justine Temgoua, Moura Dalabra, Christian Fokam Bobda   +6 more
wiley   +1 more source

Electromagnetic disturbances induced by nuclear tests in North Korea

Terrestrial, Atmospheric and Oceanic Sciences, 2021
In this study, three magnetometer stations in China and four co-located magnetometers and geoelectric field detectors in Japan were primarily used for observing co-seismic signatures excited by nuclear explosions conducted in North Korea between 2006 ...
Xuemin Zhang, Yalu Wang, Yongxin Gao, Jing Liu   +3 more
doaj   +1 more source

Interdisciplinary study of ionospheric currents and associated geoelectric fields

, 2023
The 28th IUGG General Assembly (IUGG2023) (Berlin 2023)
Egbert, G., Alken, P., Kelbert, A., Lu, G., Maute, A., Rigler, J.   +5 more
openaire   +2 more sources

Self‐Potential Signal Associated With Hydrothermal System Disrupted by Extreme Raining Events; The Case Study of Formica Leo, Piton de la Fournaise, La Réunion Island

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 11, November 2025.
Abstract The scoria cones called Formica Leo located at the base of the Piton de la Fournaise terminal cone have been chosen for its significant positive Self‐Potential (SP) anomalies associated with hydrothermal uprising fluids to monitor SP signal and study its dynamics in relation with huge and extreme rainfall events.
Emilie Roulleau, Anthony Finizola, Nicolas Vinet, Romain Biennais, Mazhar Meralli Ballou, Amélie Poullot, Céline D'Angelo, Clément Grace, Emma Chaudron Vrignaud, Rachel Gusset, Killian Mussard, Jehoji Kuzamba Ethu, Elisa‐Lou Reati   +12 more
wiley   +1 more source

Multi‐Scale Intense Geoelectric and Geomagnetic Field Perturbations Observed After an Interplanetary Magnetic Field Turning

Space Weather
Intense geoelectric fields during geomagnetic storms generate geomagnetically induced currents in power grids and other infrastructure, necessitating an understanding of their causes, for example, through coordinated space and ground observations.
Xueling Shi, Michael D. Hartinger, Ying Zou, E. Joshua Rigler, James M. Weygand, Anna Kelbert, Greg M. Lucas, Joseph B. H. Baker, Vassilis Angelopoulos   +8 more
doaj   +1 more source

Assessment of the Impact of Geomagnetic Disturbances on Korean Electric Power Systems

Energies, 2018
Geomagnetic disturbances have the potential to impact the operation of electric power systems, and thus the assessment of their impacts is required as the first step for secure power system operations.
Byoung-Soo Joo, Jung-Wook Woo, Jeong-Hun Lee, Injoo Jeong, Jungmin Ha, Se-Hee Lee, Soobae Kim   +6 more
doaj   +1 more source

Modeling and Risk Assessment of Geomagnetically Induced Currents During Geomagnetic Storm in the 500 kV Power Grid of Guangxi, China

Space Weather, Volume 23, Issue 11, November 2025.
Abstract Geomagnetic storms can induce geomagnetically induced currents (GIC) in power systems, posing threats to grid security. In this study, a GIC calculation model for the 500 kV power grid in Guangxi, China, is developed based on one‐dimensional (1D) and various three‐dimensional (3D) magnetotelluric (MT) impedance data.
Xuejian Zhang, Gilbert Pi, Zdeněk Němeček, Jana Šafránková, Tianqi Wang, Wenxin Kong, Chang Wei, Nian Yu   +7 more
wiley   +1 more source

Developing a New Ground Electric Field Model for Geomagnetically Induced Currents in Britain Based on Long‐Period Magnetotelluric Data

Space Weather
Large variations in ground electric field in mid‐latitude countries like the UK during a geomagnetic storm drive so‐called geomagnetically induced current, a major geohazard to ground‐based technological infrastructure like electrical transformers at ...
J. Hübert, E. Eaton, C. D. Beggan, A. M. Montiel‐Álvarez, D. Kiyan, C. Hogg   +5 more
doaj   +1 more source

Forecasting GICs and Geoelectric Fields From Solar Wind Data Using LSTMs: Application in Austria

Space Weather, 2022
The forecasting of local GIC effects has largely relied on the forecasting of dB/dt as a proxy and, to date, little attention has been paid to directly forecasting the geoelectric field or GICs themselves.
R. L. Bailey, R. Leonhardt, C. Möstl, C. Beggan, M. A. Reiss, A. Bhaskar, A. J. Weiss   +6 more
doaj   +1 more source

Aquifers Selection Based on Geoelectric Method Data in the Framework of Drilling Wells [PDF]

, 2018
The selection of aquifers based on Geoelectric Method data in constructing drilling wells was discussed in the present study. The research was conducted at the International Hospital Project in Nyitdah Tabanan Bali.
Redana, I. W. (I), Simpen, I. N. (I), Umratul, I. (Ika)   +2 more
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