Solar-Terrestrial Physics Solar-Terrestrial Physics Solar-Terrestrial Physics 2500-0535 29448 10.12737/stp-52201905 14th China-Russia Space Weather Workshop. November 5–9, 2018, Haikou, China 14th China-Russia Space Weather Workshop. November 5–9, 2018, Haikou, China 14th China-Russia Space Weather Workshop. November 5–9, 2018, Haikou, China Studying 630 nm atomic oxygen emission sources during strong magnetic storms in the night mid-latitude ionosphere Studying 630 nm atomic oxygen emission sources during strong magnetic storms in the night mid-latitude ionosphere Леонович Людмила Анатольевна Leonovich Lyudmila Anatolyevna lal@iszf.irk.ru

кандидат физико-математических наук;

candidate of physical and mathematical sciences;

 Тащилин Анатолий Васильевич Tashchilin Anatoliy Vasilyevich avt@iszf.irk.ru

доктор физико-математических наук;

doctor of physical and mathematical sciences;

 Лунюшкин Сергей Брониславович Lunyushkin Sergey Bronislavovich lunyushkin@iszf.irk.ru Караваев Юрий Аполлонович Karavaev Yuriy Apollonovich ykar@iszf.irk.ru Пенских Юрий Владимирович Penskikh Yury Vladimirovich penskikh@iszf.irk.ru Институт солнечно-земной физики СО РАН Иркутск Россия Institute of Solar Terrestrial Physics SB RAS Irkutsk Russian Federation Институт солнечно-земной физики СО РАН Иркутск Россия Institute of Solar-Terrestrial Physics SB RAS Irkutsk Russian Federation Институт солнечно-земной физики СО РАН Иркутск Россия Institute of Solar Terrestrial Physics SB RAS Irkutsk Russian Federation Институт солнечно-земной физики СО РАН Иркутск Россия Institute of Solar Terrestrial Physics SB RAS Irkutsk Russian Federation Институт солнечно-земной физики СО РАН Иркутск Россия Institute of Solar Terrestrial Physics SB RAS Irkutsk Russian Federation 5 2 33 38 https://zh-szf.ru/en/nauka/article/29448/view

We analyze significant increases in 630 nm atomic oxygen night emissions during very strong geomagnetic storms, using optical measurements, theoretical modeling, and magnetogram inversion technique (MIT) data. It is shown that during strong magnetic storms when electron precipitation equatorial boundary at the night sector expands up to ~40°, the interaction of energetic electron flux with thermospheric components may cause extreme increases in the 630 nm emission intensity. Model calculations of the red line intensity show good agreement with observational data. Using the November 20, 2003 magnetic storm as an example, we have found that oxygen atom collisions with thermal Maxwell and superthermal electrons make a major contribution to the integral emission intensity. Thermospheric density variations during the magnetic storm significantly affect the red line generation.

We analyze significant increases in 630 nm atomic oxygen night emissions during very strong geomagnetic storms, using optical measurements, theoretical modeling, and magnetogram inversion technique (MIT) data. It is shown that during strong magnetic storms when electron precipitation equatorial boundary at the night sector expands up to ~40°, the interaction of energetic electron flux with thermospheric components may cause extreme increases in the 630 nm emission intensity. Model calculations of the red line intensity show good agreement with observational data. Using the November 20, 2003 magnetic storm as an example, we have found that oxygen atom collisions with thermal Maxwell and superthermal electrons make a major contribution to the integral emission intensity. Thermospheric density variations during the magnetic storm significantly affect the red line generation.

 modeling ionospheric disturbance airglow magnetic storm modeling ionospheric disturbance airglow magnetic storm

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