Results 181 to 190 of about 1,531 (194)

Geoelectric Field Response to Seepage in Sand and Clay Formations

Journal of Hydrologic Engineering, 2019
AbstractAn understanding of groundwater flow in soil and rocks is necessary for civil and environmental engineering. Real-time monitoring of groundwater flow is a relatively new research area.
Yong Liu, Chao Lü, Qiang Sun
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Geoelectric field modeling for GIC risk assessment in Germany

2023
The 28th IUGG General Assembly (IUGG2023) (Berlin 2023)
Pick, L., Grayver, A., Guimarães Carvalho, A., Berdermann, J.   +3 more
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Study of the geoelectric fields at Vostok, Antarctica

2002
In fair weather regions, a downward directed geoelectric field of ~ 100 ‚ÄövÑvÆ 200 Vm-1 can be measured at the surface of the Earth. At high latitudes, the interaction of the solar wind and interplanetary magnetic field with the Earth's magnetosphere and ionosphere imposes a variable dawn-to-dusk potential drop of 20 ‚ÄövÑvÆ 150 kV on the geoelectric ...
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Estimation of the high amplitudes of the geoelectric field

The geoelectric field depends on the electrical structure of the ground and the time variations of the geomagnetic field, which become more intense during geomagnetic storms. We present a procedure for identifying the areas of higher amplitude of the geoelectric field and determining the orientation of the geomagnetic field needed to produce these ...
Alex Marcuello, Raha Hafizi, Anna Martí, Juanjo Ledo, Pilar Queralt, Perla Piña-Varas   +5 more
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Polar Cap May Have A Geoelectric Field

Physics Today, 1969
During the period of high solar and geomagnetic activity in late May 1967 the Air Force satellite OV1-9 detected energetic proton fluxes coming up the magnetic field lines from the earth at high magnetic latitudes (λ⩾65–70 deg). Ludwig Katz and Paul L.
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Change of a geoelectrical section under effect of elastic fields

Proceedings, 1996
In the last years Russian scientists from Low-Volga institute of geology and geophysics (Saratov) made some experiments to study an influence of vibrating effect on electromagnetic soundings results. These works were perfumed to investigate a possibility to raise on this basis the geological efficiency of oil and gas deposits prospecting. On fig .1 the
B. S. Svetov, E. L. Ozerkov, V. V. Tikshaev, O. A. Ageeva   +3 more
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Estimation of geoelectric field for validating geomagnetic disturbance modeling

2013 IEEE Power and Energy Conference at Illinois (PECI), 2013
Geomagnetic induced currents (GICs) cause half cycle saturation of transformers and consequently increase the harmonic currents and reactive power in the grid. This paper focuses on the GIC modeling as an important geomagnetic disturbance (GMD) mitigation program.
M. Kazerooni, null Hao Zhu, K. Shetye, T. J. Overbye   +3 more
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The effect of mid-latitude electron precipitation on the geoelectric field

Journal of Atmospheric and Terrestrial Physics, 1988
A simple model is outlined to describe electron precipitation from the population of charged particles trapped in the earth's magnetic field; almost all of the precipitation is shown to occur in the region of the South Atlantic Anomaly. When the effect of a dawn-to-dusk electric field across the magnetosphere is included in the model, a diurnal ...
W.R. Sheldon, J.R. Benbrook, G.J. Byrne
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Experimental Geoelectric Investigation within the Gold Field in Ukraine

2nd EAGE St Petersburg International Conference and Exhibition on Geosciences, 2006
The results of experimental geoelectric investigation within the gold field in Ukraine are given. The obtained data show that developed express-technology of geoelectric research can be used for ore (and gold) fields prospecting.
M. Yakymchuk, I. Korchagin, S. Levashov, Y. Pyschaniy, A. Koval   +4 more
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Geoelectric Fields and Geomagnetically Induced Currents in the United Kingdom

2004
This thesis investigates geo-electric fields in the United Kingdom with particular regard to Geomagnetically Induced Currents (GIC) in the Scottish Power electricity transmission network (SPTN). The joint spectral characteristics of Scottish Power GIC and Eskdalemuir magnetic observatory data are analysed, and GIC are shown to be coherent with magnetic
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