Topic
Solar eclipse
About: Solar eclipse is a research topic. Over the lifetime, 2737 publications have been published within this topic receiving 22625 citations.
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TL;DR: In this paper, a mathematical model based on the classical Ashour-Chapman model is considered to show that the decrease (up to 40%) of the ionospheric total electron content in the region of the totality belt leads finally to geomagnetic disturbances quantitatively dependent on the position of both the quasi-circular spot of the Ionospheric conductivity decrease and given geOMagnetic observatory location.
Abstract: [1] The solar eclipse on 11 August 1999 was quite unique due to its totality belt coverage of the territory of central Europe where the facilities for the geophysical monitoring are most dense. Ionospheric and geomagnetic observations during the eclipse allowed us to study the eclipse-induced effects more precisely. A mathematical model based on the classical Ashour-Chapman model is considered to show that the decrease (up to 40%) of the ionospheric total electron content in the region of the totality belt leads finally to geomagnetic disturbances quantitatively dependent on the position of both the quasi-circular spot of the ionospheric conductivity decrease and given geomagnetic observatory location. The model is generalized for the anisotropic ionosphere. The theoretical estimates are compared with observational data from European geomagnetic observatories: Furstenfeldbruck, Nagycenk, Tihany, and Hurbanovo, the last one being nearby the totality belt.
14 citations
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14 citations
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TL;DR: In this article, les resultats de la photometrie de la couronne solaire, obtenus durant l'eclipse solaire totale du 31 juillet 1981, are presented.
Abstract: Resultats de la photometrie de la couronne solaire, obtenus durant l'eclipse solaire totale du 31 juillet 1981, ainsi qu'une analyse morphologique
14 citations
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TL;DR: In this article, the authors have shown that the axis of symmetry of the "helmet" type streamers is tilted towards the solar equator and deviations from a radial direction in the western hemisphere are greater than those in the eastern one (21°/8°).
14 citations
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TL;DR: In this paper, the authors used the eddy correlation technique to compute the surface boundary layer parameters of the atmosphere during the annular solar eclipse over a tropical coastal station, occurred during the noon hours.
14 citations