Results 51 to 60 of about 2,646 (221)

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

Relationship between Interplanetary Conditions and Changes in the Geomagnetic Field to Understand the Causes of Geomagnetically Induced Currents [PDF]

, 2018
Geomagnetically Induced Currents (GICs) are electrical currents induced in ground-level conductive networks, like power lines and pipelines, which can cause costly damage to infrastructure.
Maillet, Cameron P
core   +1 more source

Intense Ground Magnetic Perturbations During the 2024 May and October Geomagnetic Storms

Journal of Geophysical Research: Space Physics, Volume 131, Issue 3, March 2026.
Abstract The May and October 2024 geomagnetic storms represent two of the most intense space weather events of Solar Cycle 25. While differing in global intensity, both storms produced extreme ionospheric disturbances, including equatorward auroral expansion to mid‐latitudes and rapid geomagnetic variations (dH/dt $\text{dH}/\text{dt}$).
P. De Michelis, E. Consolini, F. Giannattasio, G. Consolini   +3 more
wiley   +1 more source

Broadband Dielectric Analysis of Clays: Impact of Cation Exchange Capacity, Water Content, and Porosity

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 3, March 2026.
Abstract Clay‐rich soils and sediments are key components of near‐surface systems, influencing water retention, ion exchange, and structural stability. Their complex dielectric response under moist conditions arises from surface–ion electrostatics and diffuse double layers that govern transport and retention processes. This study explores the broadband
Felix Schmidt, Norman Wagner, Ines Mulder, Katja Emmerich, Thierry Bore, Jan Bumberger   +5 more
wiley   +1 more source

Study on the change characteristics of regional geoelectric fields

Journal of Earth System Science, 2019
In this study, we illustrate the temporal variations of the geoelectric field and geomagnetic field by data from eight geoelectric field stations and four geomagnetic field stations in Mainland China in 2011. The maximum entropy spectral estimation method (MEM) was used to process the data in our study. The results show that: (i) it is obvious seasonal
Y Y Fan, Z H An, J J Wang, J Liu
openaire   +2 more sources

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

Introduction to tensorial resistivity probability tomography

, 2005
The probability tomography approach developed for the scalar resistivity method is here extended to the 2D tensorial apparent resistivity acquisition mode.
Mauriello, Paolo, Patella, Domenico
core   +1 more source

A comparison of methods for estimating the geoelectric field [PDF]

Space Weather, 2017
AbstractThe geoelectric field is the primary input used for estimation of geomagnetically induced currents (GICs) in conducting systems. We compare three methods for estimating the geoelectric field given the measured geomagnetic field at four locations in the U.S.
openaire   +1 more source

Observations of Tidal Induced Responses in Self‐Potential Data in a UK Beach Sand Aquifer: Implications for Monitoring Seawater Intrusion

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 3, March 2026.
Abstract Affordable and effective early warning of saline intrusion into aquifers is a key challenge affecting coastal water supplies. This paper reports on self‐potential (SP) monitoring close to a mobile saline‐fresh water interface over a 3‐month period.
T. S. L. Rowan, A. P. Butler, M. C. McDonnell, J. F. Águila, R. Flynn, G. A. Hamill, S. Donohue, M. D. Jackson   +7 more
wiley   +1 more source

High Voltage DC Active Current Injection to Simulate Geomagnetically Induced Currents in New Zealand

Space Weather, Volume 24, Issue 3, March 2026.
Abstract This study investigates the effects of geomagnetically induced currents (GIC) on New Zealand's electrical infrastructure via an intentional ground injection of direct current (DC) from a high voltage DC converter station. GIC manifests as quasi‐DC currents within power systems, potentially causing transformer saturation, increased reactive ...
Soren Subritzky, Andrew Lapthorn, Stewart Hardie, Paul Agger, Mike Dalzell, Mark A. Clilverd, Neil Cobbett, Ciaran Beggan, Juliane Hübert, Eliot Eaton, James B. Brundell, Craig J. Rodger   +11 more
wiley   +1 more source