Model estimation of the OI 630 nm emission intensity during the strong geomagnetic storm on November 20, 2003
A.V. Tashchilin, L.A. Leonovich
Institute of Solar-Terrestrial Physics of the Siberian Branch of the RAS, 664033, Irkutsk, 126a, Lermontova str
Keywords: ионосферное возмущение, свечение верхней атмосферы, геомагнитные бури, ionospheric disturbance, airglow, geomagnetic storm
Abstract
Based on the energetic electron precipitation data, obtained using the magnetogram inversion technique (MIT), there were performed model estimates of variations in the night mid-latitude ionosphere parameters for Irkutsk (52(N, 105(E) during the very strong geomagnetic storm on November 20-23, 2003 ( K р = 9, D stmax = 472 nT). The derived fluxes of precipitating electrons are able to produce the night electron density with ne ( 3 ( 106 cm(3 and electron temperature Te ( 4500 K, which can provide the observed magnitude increase in the red line emission due to excitation of atomic oxygen 1 D level, mainly in collisions of molecular oxygen ions with thermal electrons.
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