Results 31 to 40 of about 231 (130)

Comparison of Geoelectric Fields Computed by the Complex Image, Magnetotelluric, and Finite‐Difference Time‐Domain Methods

Space Weather
It is important to be able to accurately predict geoelectric field behavior so that potential space weather hazards to large grounded infrastructure, such as electric power grids, smart grids, oil and gas pipelines, and railway systems, can be better ...
Prashanna S. Paneru, Darcy Cordell, Jamesina J. Simpson, Mark B. Moldwin   +3 more
doaj   +1 more source

Modeling Geomagnetic Interference on Railway Signaling Track Circuits

Space Weather, 2021
Misoperation of railway signaling during geomagnetic disturbances has occurred in a number of countries. Railway signals are activated by track circuits that detect the presence of a train in a particular rail section, but geomagnetically induced ...
D. H. Boteler
doaj   +1 more source

Geophysical investigation of the Santa Marta impact structure—Piauí State, Brazil

Meteoritics &Planetary Science, EarlyView.
Abstract The Santa Marta impact structure in northeastern Brazil, recognized as a partially preserved complex crater, was investigated through an integrated geophysical study employing magnetotelluric (MT) and gravity methods. Our research provides constraints on the crater's subsurface architecture.
Elienara Vasconcelos, João De Oliveira, Marcos Vasconcelos, Martyn Unsworth, Andrea Santos‐Matos, Florivaldo Sena   +5 more
wiley   +1 more source

Localized Threats: How Ground Conductivity Shapes the Geoelectric Response

Space Weather
Geomagnetic storms can induce strong geoelectric fields in the ground. These fields drive geomagnetically induced currents in technological conductor systems, such as power grids.
M. Kellinsalmi, E. Marshalko, L. Juusola, A. Viljanen   +3 more
doaj   +1 more source

Monitoring of the geomagnetic and geoelectric field in two regions of Greece for the detection of earthquake precursors

Annals of Geophysics, 1997
Two magnetotelluric stations have been installed in the South-Eastern Thessaly basin (Central Greece), which have recorded the geomagnetic and geoelectric fields since 1993.
E. E. Papadimitriou, B. C. Papazachos, G. Tsokas, J. Zlotnicki, G. Vargemezis   +4 more
doaj   +1 more source

Multiphysics Monitoring of Capillary, Electrical, and Elastic Responses During Drainage and Imbibition at Reservoir Conditions

Water Resources Research, Volume 62, Issue 7, July 2026.
Abstract Capillary pressure‐saturation relationships are crucial for geo‐energy recovery, and increasingly, for environmental applications. However, for reservoir‐relevant pressure and temperature conditions, only limited data sets are available from special core analysis in laboratory (SCAL) studies.
Juliane Kummerow, Erik Spangenberg, Ronny Giese   +2 more
wiley   +1 more source

Study on the background characteristics of electric fields constrained by cross-sphere observations

Earth, Planets and Space
The interactions among Earth’s spheres constitute both the starting point and ultimate goal of Earth system science research. An in-depth investigation into these interactions is essential for advancing the interdisciplinary integration and collaborative
MuPing Yang, XueMin Zhang, XuHui Shen, Yu Yuan, Tao Chen, JinLei Li, XinYan Ouyang, TongXia Li   +7 more
doaj   +1 more source

An Approximate Time‐Domain Solution for Recharge Propagation Through Thick Unsaturated Zones

Hydrological Processes, Volume 40, Issue 6, June 2026.
This study presents a time‐domain analytical solution for modelling groundwater recharge through thick unsaturated zones, applied to the Urucuia aquifer in Brazil. The model was calibrated using observed well data, capturing the attenuation of seasonal groundwater level fluctuations with depth.
Caio Leão, Joelson da Conceição Batista, Harald Klammler   +2 more
wiley   +1 more source

Review of geomagnetically induced currents

地球与行星物理论评, 2022
Geomagnetic disturbances caused by solar activities induce geoelectric fields on the earth's surface, which generate geomagnetically induced currents (GICs) in electrically conducting systems.
Wanye Bu, Huiqian Zhang, Qinghua Huang
doaj   +1 more source

The United States Magnetotelluric Array and the National Impedance Map

Reviews of Geophysics, Volume 64, Issue 2, June 2026.
Abstract The United States Magnetotelluric Array (USMTArray) data set, collected in the years 2006–2024, consists of more than 1,700 long‐period magnetotelluric stations covering the entirety of the contiguous United States on a quasi‐regular 70 km grid.
Anna Kelbert, Paul A. Bedrosian, Adam Schultz, Gary D. Egbert, Louise Pellerin, Jeffrey J. Love, Andrew Frassetto, Benjamin S. Murphy   +7 more
wiley   +1 more source