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Origination of G conditions in the ionospheric F region depending on solar and geomagnetic activity

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Abstract

The dependence of the origination of G conditions in the ionospheric F region on solar and geomagnetic activity has been determined based on numerical simulation of the ionosphere over points 50° N, 105° E and 70° N, 105° E for summer conditions at noon. It has been found that the threshold value of the Kp geomagnetic activity index (Kp S ), beginning from which a G condition can originate, is minimal for a low solar activity level at relatively high latitudes during the recovery phase of a geomagnetic storm. On average, Kp S increases with increasing solar activity, but G conditions can originate at high solar activity levels and be absent at moderate ones for certain Kp values, which was apparently predicted for the first time. These properties of the origination of G conditions do not contradict the known results of a G-condition statistical analysis performed based on the data from the global network of ionospheric stations.

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Authors and Affiliations

  1. Pushkov Institute of Terrestrial Magnetism, Ionosphere, and Radiowave Propagation, Russian Academy of Sciences, Troitsk, Moscow oblast, 142190, Russia

    M. G. Deminov

  2. Institute of Solar-Terrestrial Physics, Siberian Branch, Russian Academy of Sciences, P.O. Box 4026 (291), Irkutsk, 664033, Russia

    E. B. Romanova & A. V. Tashchilin

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  1. M. G. Deminov
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  2. E. B. Romanova
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  3. A. V. Tashchilin
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Correspondence to M. G. Deminov.

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Original Russian Text © M.G. Deminov, E.B. Romanova, A.V. Tashchilin, 2011, published in Geomagnetizm i Aeronomiya, 2011, Vol. 51, No. 5, pp. 683–689.

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Deminov, M.G., Romanova, E.B. & Tashchilin, A.V. Origination of G conditions in the ionospheric F region depending on solar and geomagnetic activity. Geomagn. Aeron. 51, 669–675 (2011). https://doi.org/10.1134/S0016793211050045

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