Response of 557.7 and 630-nm atomic oxygen emissions to sharp variations in solar wind parameters
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The paper presents the study of the 557.7 and 630-nm atomic oxygen emission responses to sharp variations in solar wind parameters caused by shock waves. The optical and geomagnetic data for Eastern Siberia, as well as data on parameters of the interplanetary magnetic field and solar wind, were used for the analysis. An increase in the emission intensity was observed at sharp variations in the speed and density of solar wind plasma in certain cases, whereas the responses were absent in other cases. It is shown that the presence or absence of the responses in the intensity of the emissions does not relate to the disturbance amplitude of the solar wind parameters. It is suggested that the increase in the emission intensity can be caused by electron precipitations from a magnetic trap during interaction between shock waves propagating in the solar wind and the magnetosphere.
Keywordsionospheric disturbance airglow geomagnetic storm
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