Results 61 to 70 of about 7,095,631 (100)

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

Implications of heterogeneous embankment conditions for geoelectrical investigations on dams: A case study at Mactaquac Dam, Canada

Near Surface Geophysics, Volume 24, Issue 4, Page 303-324, August 2026.
Abstract Electrical resistivity tomography (ERT) has been shown to be effective for surveying and monitoring dams, due to the method's sensitivity to moisture content and relevant physical properties (e.g., porosity). Automated ERT systems, capable of time‐lapse monitoring, can be used to detect variations in ground conditions.
John S. Ball, Karl E. Butler, Jonathan E. Chambers, Paul B. Wilkinson, Andrew Binley   +4 more
wiley   +1 more source

Discussion on the sea–land telluric current vector and its continuity during a geomagnetic storm based on coastal stations in China and Canada

Geomatics, Natural Hazards & Risk, 2019
The sea-land telluric current vector and its continuity during two geomagnetic storms are discussed using observation data of 13 geoelectric field stations within 100 km of the coastline in China and 5 similar stations in Canada.
Xin Zhang, Qing Ye, Gaochuan Liu
doaj   +1 more source

3D effects of seawater on electrical resistivity tomography near shorelines—Challenges and possible solutions inferred from synthetic and field data

Near Surface Geophysics, Volume 24, Issue 4, Page 364-391, August 2026.
Abstract Electrical resistivity tomography (ERT) is one of the most widely used geophysical techniques for hydrogeological questions, such as investigating the groundwater transition zone between land and sea. The interpretation of 2D coast‐parallel ERT profiles is challenging because most of the electrical current flows through the highly conductive ...
Simon Levin Fischer, Ercan Erkul, Jasper Justus Lutz Hoffmann, Şerif Barış, Ertan Pekşen, İsmail Kaplanvural, Wolfgang Rabbel   +6 more
wiley   +1 more source

Kamafugite Magma Pathways and Lava‐Flow Paleotopography From Three‐Dimensional Audiomagnetotelluric Imaging Constrained by Borehole Data

Earth and Space Science, Volume 13, Issue 8, August 2026.
Abstract An audiomagnetotelluric (AMT) survey was conducted within the Alto Paranaíba Igneous Province, southeastern Brazil, to delineate shallow occurrences of kamafugite, a rare ultrapotassic volcanic rock worldwide. A dense grid of AMT stations was deployed, allowing the construction of a high‐resolution 3D electrical resistivity model ...
Lucca M. Franco, Emanuele F. La Terra, Liliane P. Panetto, Adevilson O. Alves, Miguel A. Tupinambá, Sergio L. Fontes, Emin U. Ulugergerli   +6 more
wiley   +1 more source

The Effect of Tidal Geoelectric Fields on GIC and PSP in Buried Pipelines

IEEE Access, 2019
Compared with the investigation of geomagnetically induced currents (GIC) in power grids, there is less study about the effect of geomagnetic disturbance (GMD) on buried oil and gas pipelines in mid-low latitude areas, which includes GIC and pipe-to-soil
Lianguang Liu, Zebang Yu, Xuan Wang, Wenlin Liu   +3 more
doaj   +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

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

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   +1 more source

Design and Performance Verification of a Non-Contact Geoelectric Field Sensor Based on a Three-Layer Composite Structure

Sensors
Geoelectric field observations play a vital role in geophysical exploration, geological disaster early warning, and underground resource detection.
Shaohong Wang, Da Lei, Qihui Zhen
doaj   +1 more source