Results 11 to 20 of about 1,817,388 (196)

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 ...
Mark Moldwin, Jamesina Simpson, Prashanna Sharma Paneru   +2 more
exaly   +3 more sources

Geoelectric monitoring at the Boulder magnetic observatory [PDF]

Geoscientific Instrumentation, Methods and Data Systems, 2017
Despite its importance to a range of applied and fundamental studies, and obvious parallels to a robust network of magnetic-field observatories, long-term geoelectric field monitoring is rarely performed.
C. C. Blum, T. C. White, E. A. Sauter, D. C. Stewart, P. A. Bedrosian, J. J. Love   +5 more
doaj   +4 more sources

Geolectric field measurement, modelling and validation during geomagnetic storms in the UK [PDF]

Journal of Space Weather and Space Climate, 2021
Significant geoelectric fields are produced by the interaction of rapidly varying magnetic fields with the conductive Earth, particularly during intense geomagnetic activity.
Beggan Ciarán D., Richardson Gemma S., Baillie Orsi, Hübert Juliane, Thomson Alan W. P.   +4 more
doaj   +2 more sources

Forecasting Geomagnetically Induced Currents From Solar Wind and Geoelectric Field Data Using Deep Learning: Application in Fujian, China

Space Weather
We developed a multi‐module convolutional neural network combined with a multi‐head attention mechanism (MM‐CNN‐MHA) to forecast geomagnetically induced currents (GICs) at the Huangmeishan (HMS) 220‐kV substation in Fujian Province, China.
Xuejian Zhang, Gilbert Pi, Wenxin Kong, Zikun Zhou, Sheng Li, Zdeněk Němeček, Jana Šafránková, Ye Fan, Nian Yu   +8 more
doaj   +2 more sources

Geoelectric field response characteristics analysis of floor roadway surrounding rock fracture caused due to coal seam mining [PDF]

Scientific Reports, 2021
The fracture of rocks surrounding the floor roadway during the mining of the working face of a coal mine is a complicated spatiotemporal process due to the superimposed action of multiple stress fields on the surrounding rock mass.
Yuanchao Ou, Pingsong Zhang, Maoru Fu, Xiongwu Hu, Rongxin Wu, Chang Liu, Binyang Sun, Shiang Xu, Shenglin Li, Lei Tan   +9 more
doaj   +2 more sources

Analysis of Large Geomagnetically Induced Currents During the 7–8 September 2017 Storm: Geoelectric Field Mapping

Space Weather, 2023
High temporal and high spatial resolution geoelectric field models of two Mäntsälä, Finnish pipeline geomagnetically induced current (GIC) intervals that occurred within the 7–8 September 2017 geomagnetic storm have been made.
Anna Wawrzaszek, Agnieszka Gil, Renata Modzelewska, Bruce T. Tsurutani, Roman Wawrzaszek   +4 more
doaj   +2 more sources

Magnetotelluric Sampling and Geoelectric Hazard Estimation: Are National‐Scale Surveys Sufficient?

Space Weather, 2021
At present, the most reliable information for inferring storm‐time ground electric fields along electrical transmission lines comes from coarsely sampled, national‐scale magnetotelluric (MT) data sets, such as that provided by the EarthScope USArray ...
Benjamin S. Murphy, Greg M. Lucas, Jeffrey J. Love, Anna Kelbert, Paul A. Bedrosian, E. Joshua Rigler   +5 more
doaj   +2 more sources

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.
Risto Pirjola, David Boteler
exaly   +3 more sources

Historical data of geoelectric field observations in Japan [PDF]

Geoscience Data Journal, 2021
AbstractThe Kakioka Magnetic Observatory (KMO) of the Japan Meteorological Agency (JMA) made geoelectric field observations at Kakioka, Memambetsu and Kanoya from 1932, 1949 and 1948, respectively, until February 2021, when observations at all three sites were terminated.
Shingo Nagamachi, Shin Arita, Eiji Hirota   +2 more
openaire   +2 more sources

Comparison of the modelled geoelectric fields of the Carrington and Halloween storms

Journal of Space Weather and Space Climate
An extreme geomagnetic storm comparable to the Carrington event in 1859 could have a significant impact on modern infrastructure, such as power grids. A previously published simulation by Blake et al.
Viljanen Ari, Marshalko Elena, Juusola Liisa, Laitinen Tiera, Kauristie Kirsti   +4 more
doaj   +2 more sources