Geomatics, Natural Hazards and Risk, 2023 AbstractThis paper reports three methods of researching the geoelectric index (GEI) based on the ratio between the variation amplitude of geoelectric field on an index calculation day and that on a magnetically quiet day, and uses the three methods to process the observation data of 18 geoelectric stations in China in September 2017.
Junsong Sun +4 more
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Frequency Considerations in GIC Applications
Space Weather, 2021 Geomagnetically induced currents (GIC) are a phenomenon well known for its negative effects on the operations of power systems. To efficiently mitigate them requires different types of power system modeling, from GIC to alternating current harmonic ...
L. Trichtchenko
doaj +1 more source
Analysis of the features of the spatio-temporal distribution of geoelectric inhomogeneities in the Earth’s crust and seismic events [PDF]
EPJ Web of Conferences, 2021 The paper presents the results of experiments carried out at the regime points of magnetotelluric monitoring both on the territory of the Bishkek geodynamic test site (Northern Tien Shan) and on a series of monitoring profiles in various geological ...
Bataleva Elena
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A geomagnetic precursor to the 1979 Carlisle earthquake [PDF]
, 1982 A study of horizontal field transfer functions, in the period range 10-104 s, has been made for the 2 year period preceding the 1979 Carlisle earthquake (magnitude 5).
Beamish, David
core +1 more source
Applying inversion techniques to derive source currents and geoelectric fields for geomagnetically induced current calculations [PDF]
Annales Geophysicae, 2014 This research focuses on the inversion of geomagnetic variation field measurement to obtain source currents in the ionosphere. During a geomagnetic disturbance, the ionospheric currents create magnetic field variations that induce geoelectric fields ...
J. S. de Villiers, P. J. Cilliers
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Tectonic interpretation of electrical structures beneath the West African craton edge in eastern Senegal [PDF]
, 1988 Des mesures du champ magnétotellurique à travers le bassin côtier du Sénégal et la chaîne des Mauritanides ont permis l'élaboration de modèles de résistivité à deux dimensions. Les sections géoélectriques reflètent les changements latéraux de résistivité
Ritz, Michel, Robineau, Bernard
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Regression‐based forecast model of induced geoelectric field
Space Weather, 2017 AbstractThe electric field induced due to solar activity is the driver of geomagnetically induced currents (GIC) in grounded conductor networks such as power grids. We present a regression‐based (i.e., empirical) model for quantitatively predicting the upper envelope of induced E field components, using near‐Earth measurements of solar wind plasma and ...
S. I. Lotz, M. J. Heyns, P. J. Cilliers
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Geoelectric Field Evaluation During the September 2017 Geomagnetic Storm: MA.I.GIC. Model [PDF]
Space Weather, 2019 AbstractThe space environment near Earth is constantly subjected to changes in the solar wind flow generated at the Sun. Examples of this variability are the occurrence of powerful solar disturbances, such as coronal mass ejections (CMEs). The impact of CMEs on the Earth's magnetosphere perturbs the geomagnetic field causing the occurrence of ...
M. Piersanti +4 more
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Estimating Geomagnetically Induced Currents in Southern Brazil Using 3‐D Earth Resistivity Model
Space Weather, 2023 Geomagnetically induced currents (GICs) result from the interaction of the time variation of ground magnetic field during a geomagnetic disturbance with the Earth's deep electrical resistivity structure.
Karen V. Espinosa +4 more
doaj +1 more source
Geomagnetically Induced Currents in the Irish Power Network during Geomagnetic Storms
, 2016 Geomagnetically induced currents (GICs) are a well-known terrestrial space weather hazard. They occur in power transmission networks and are known to have adverse effects in both high and mid-latitude countries.
Alan G. Jones (1355523) +9 more
core +2 more sources