Variations Transitoires Régulières de la Composante Horizontale du Champ Magnétique Terrestre en République Démocratique du Congo pour un Cycle Solaire
Publication Date : 03/10/2022
With respect to its geographical position, the Democratic Republic of the Congo or DRC is located south of magnetic equator, an area of great variation in the horizontal component of the earth magnetic field. .Our study attempts to figure out the implication of this phenomenon in DRC. Our analysis is limited to the solar cycle 1955-1965. It is based on 5 quiet magnetic each day as well as on the data from two observatories, Binza and Karavia. After data analysis, this study shows that the DRC is under the influence of Hall and Pedersen current called ionospheric current, which circulates in the earth's ionosphere with regard to the magnetic equator. These currents are responsible of some of the magnetic phenomena including thunderstorm and magnetic storm in neutral atmosphere. But also there are responsible of current induction into the crust, which generates large variations of the horizontal component of the earth magnetic field on ground. These effects occur between dawn and dusk with varying intensities during the day. From the above mentioned, it is important to take into account the variation in the intensity of the ionospheric current in general in order to better protect the magnetic network against the induction of the current in the crust but also to protect the terrestrial environment against solar radiation. Keywords: Horizontal component, ionospheric current, sunspot.
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